标签:match interval add mod substr call factor prototype 格式
本文参考原文-http://bjbsair.com/2020-03-25/tech-info/6338/
常用JS方法封装方法预告:
使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
无参 computeTime(f)
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
有参 computeTime(f) 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
/**
* 函数防抖 (只执行最后一次点击)
*/
Debounce = (fn, t) => {
let delay = t || 500;
let timer;
return function () {
let args = arguments;
if(timer){
clearTimeout(timer);
}
timer = setTimeout(() => {
timer = null;
fn.apply(this, args);
}, delay);
}
};
/*
* 函数节流
*/
Throttle = (fn, t) => {
let last;
let timer;
let interval = t || 500;
return function () {
let args = arguments;
let now = +new Date();
if (last && now - last < interval) {
clearTimeout(timer);
timer = setTimeout(() => {
last = now;
fn.apply(this, args);
}, interval);
} else {
last = now;
fn.apply(this, args);
}
}
};
复制代码
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
需要在HTML文件中运行
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
/**
* num为你想要进行填充的数字
* length为你想要的数字长度
*/
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
/**
* base64 base64
* filename 转换后的文件名
*/
base64ToFile = (base64, filename )=> {
let arr = base64.split(‘,‘)
let mime = arr[0].match(/难过.*?);/)[1]
let suffix = mime.split(‘/‘)[1] // 图片后缀
let bstr = atob(arr[1])
let n = bstr.length
let u8arr = new Uint8Array(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n)
}
return new File([u8arr], `${filename}.${suffix}`, { type: mime })
}
复制代码
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
/**
* file 图片文件
* 返回图片的Base64数据
*/
fileToBase64 = file => {
let reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = function (e) {
return e.target.result
};
}
复制代码
/**
* name为地址栏传递过来的字段名
*/
getQueryString = name => {
let reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
let r = window.location.search.substr(1).match(reg);
if (r != null) return unescape(r[2]); return null;
}
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
/**
* obj 需要处理的对象
*/
objToArrObj = obj => {
let arr = []
for(let i in obj){
arr.push({[i]:obj[i]})
}
return arr
}
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
```本文参考原文-http://bjbsair.com/2020-03-25/tech-info/6338/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
![手把手教你常用JS方法封装(一) [ 大杂烩 ]](http://p3.pstatp.com/large/dfic-imagehandler/a3548031-8354-4d74-a3c5-dd39f97e2390)
持续更新中...
========
常用JS方法封装方法预告:
* 项目常用JS方法封装(二) [ 时间处理 ]
* 项目常用JS方法封装(三) [ 字符串相关处理 ]
* 项目常用JS方法封装(四) [ 数组相关处理 ]
* * *
**使用方法非常简单,只需放到你的 utils.js 工具文件中,直接 export const 加上我的封装方法,在别的文件中使用{方法1,方法2,方法3...}引用后就可以直接使用了!**
001.输入一个值,返回其数据类型
=================
type = para => {
return Object.prototype.toString.call(para).slice(8,-1)
}
复制代码
002.阶乘
======
factorial = num => {
let count = 1;
for (let i = 1; i <= num; i++) {
count *= i;
}
return count;
}
复制代码
003.两个数之间累乘
===========
multBetride = (x, y) => {
let count;
if (x < y) {
count = x;
for (let i = x + 1; i <= y; i++) {
count *= i;
}
return count;
} else {
count = y;
for (let i = y + 1; i <= x; i++) {
count *= i;
}
return count;
}
}
复制代码
004.累加
======
()里面可以放N个实参
function cumsum() {
let sum = 0;
for (let i = 0; i < arguments.length; i++) {
sum += arguments[i];
}
return sum;
}
复制代码
005.计时器(计算代码块(函数)执行时间)
======================
**无参 computeTime(f)**
computeTime = code => {
let startTime = new Date().getTime();
code();
let endTime = new Date().getTime();
let time = endTime - startTime;
return time;
}
复制代码
**有参 computeTime(f)** 使用方法:computeTime(f,参数1,参数2......)
computeTime = f => {
let startTime = new Date().getTime();
let p = [];
for (let i = 1; i < arguments.length; i++) {
p.push(arguments[i])
}
f.apply(null, p)
let endTime = new Date().getTime();
let Time = endTime - startTime;
return Time;
}
复制代码
006.数字超过9显示省略号
==============
num_filter = val =>{
val = val?val-0:0;
if (val > 9 ) {
return "…"
}else{
return val;
}
}
复制代码
007.数字超过99显示99+
===============
ninenum_filter = val =>{
val = val?val-0:0;
if (val > 99 ) {
return "99+"
}else{
return val;
}
}
复制代码
008.银行卡号分割
==========
bank_filter = val =>{
val += ‘‘;
val = val.replace(/(\s)/g,‘‘).replace(/(\d{4})/g,‘$1 ‘).replace(/\s*$/,‘‘);
return val;
}
复制代码
009.防抖与节流
=========
/**
复制代码
010.深拷贝
=======
deepClone = source => {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source.hasOwnProperty(keys)) {
if (source[keys] && typeof source[keys] === ‘object‘) { // 如果值是对象,就递归一下
targetObj[keys] = source[keys].constructor === Array ? [] : {};
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是,就直接赋值
targetObj[keys] = source[keys];
}
}
}
return targetObj;
}
let str1 = {
arr: [1, 2, 3],
obj: {
key: ‘value‘
},
fn: function () {
return 1;
}
};
let str3 = deepClone(str1);
console.log(str3 === str1); // false
console.log(str3.obj === str1.obj); // false
console.log(str3.fn === str1.fn); // true
复制代码
011.获取视口尺寸
==========
**需要在HTML文件中运行**
function getViewportOffset() {
if (window.innerWidth) {
return {
w: window.innerWidth,
h: window.innerHeight
}
} else {
// ie8及其以下
if (document.compatMode === "BackCompat") {
// 怪异模式
return {
w: document.body.clientWidth,
h: document.body.clientHeight
}
} else {
// 标准模式
return {
w: document.documentElement.clientWidth,
h: document.documentElement.clientHeight
}
}
}
}
复制代码
012.数字前补零
=========
/**
//迭代方式实现
padding1=(num, length)=> {
for(let len = (num + "").length; len < length; len = num.length) {
num = "0" + num;
}
return num;
}
//递归方式实现
padding2=(num, length) =>{
if((num + "").length >= length) {
return num;
}
return padding2("0" + num, length)
}
//转为小数
padding3=(num, length)=> {
let decimal = num / Math.pow(10, length);
//toFixed指定保留几位小数
decimal = decimal.toFixed(length) + "";
return decimal.substr(decimal.indexOf(".")+1);
}
//填充截取法
padding4=(num, length)=> {
//这里用slice和substr均可
return (Array(length).join("0") + num).slice(-length);
}
//填充截取法
padding5=(num, length)=> {
let len = (num + "").length;
let diff = length+1 - len;
if(diff > 0) {
return Array(diff).join("0") + num;
}
return num;
}
复制代码
013.格式转换:base64转file
====================
/**
${filename}.${suffix}
, { type: mime })
014.格式转换:base64转blob
====================
base64ToBlob = base64 => {
let arr = base64.split(‘,‘),
mime = arr[0].match(/??.*?);/)[1],
bstr = atob(arr[1]),
n = bstr.length,
u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
};
复制代码
015.格式转换:blob转file
==================
blobToFile = (blob, fileName) => {
blob.lastModifiedDate = new Date();
blob.name = fileName;
return blob;
};
复制代码
016.格式转换:file转base64
====================
/**
017.获取地址栏传递过来的参数
================
/**
// 测试
// http://localhost:3306/admin?id=111&name=xxx
// console.log(getQueryString(‘id‘)); // 111
// console.log(getQueryString(‘name‘)); // xxx
复制代码
018.对象处理为数组对象
=============
/**
// 测试数据
let obj = {20180410: 5, 20180411: 13, 20180412: 26, 20180413: 16}
console.log(objToArrObj(obj));
/*
[
{ 20180410: 5 },
{ 20180411: 13 },
{ 20180412: 26 },
{ 20180413: 16 }
]
*/
step by step教你常用JS方法封装(一) [ 大杂烩 ]
标签:match interval add mod substr call factor prototype 格式
原文地址:https://www.cnblogs.com/lihanlin/p/12571875.html