标签：如何 mouseover btn inner 支持 length sel 比较 ==
产品说，我们做一个转盘活动吧，需要轮播中奖信息。 当然这需求完全没有问题。
产品说，你听我说完。
没问题吧。
额， 等等，没多大问题。 那个谁，这个任务教你啦。
然后，我的同事开始搜罗实现方案，很多都是匀速走的。
同事甚至和产品讨论要不要换成跑马灯，嘻嘻， 开玩笑。
说个笑话，csdn上有不少的这样代码，但是下载要积分，我可以说，日了*狗么！。
一个下午天气晴，有凉风，心情还好。 于是花了一点时间思考了一种方案。
关于移动端动画，无非是纯js控制，js Animation API(兼容不理想)， css动画，canvas, webgl以及杂交方案。 关于本需求，前两种应该比较适合，成本低，容易实现。
纯js实现控制比较传统的方案，要启用定时器setTimeout/setInterval/requestAnimation等等，我很烦这。
采用css3 + js杂交方案，有戏靠谱。 既然有三个阶段，那么我就把你拆成三段动画， 随你去配置，随你去high。 当然你也可以用一段动画，通过设置来控制距离。
整体的思路
改进
const contents = [
"队列1：春天 - first",
"队列1：夏天",
"队列1：秋天",
"队列1：冬天",
"队列1：夏夏湉",
"队列1：求七天",
"队列1：Who are You - last"
];
const contents2 = [
"队列2：这是怎么回事 - first",
"队列2：谁是最可赖的人",
"队列2：壮士一去不复返",
"队列2：谁来拯救你",
"队列2：家福乐团购有没有 - last"
]
const el = document.querySelector("#box");
let upSlide = new UpSlide({
el
});
upSlide.start(contents);
document.getElementById('btnChange').addEventListener("click", () => {
upSlide.start(contents);
})
document.getElementById('btnChange2').addEventListener("click", () => {
upSlide.start(contents2);
})等等这个有点用， 源码呢
上滑跑马灯源码
再贴出源码，这样文章长一点
const DEFAULT_OPTION = {
inTime: 1000,
pauseTime: 1500,
outTime: 1000,
className: "upslide-item",
animationClass: "upslide-item-animation",
animationInClass: "slideup-animation-in",
animationPauseClass: "slideup-animation-pause",
animationOutClass: "slideup-animation-out",
pauseOnFocus: false
};
const DELETING_CLASS_NAME = "__deleting__";
function clearSiblings(el) {
const parent = el.parentElement;
// 移除前面节点
while (el.previousElementSibling) {
parent.removeChild(el.previousElementSibling);
}
// 移除后面的节点
while (el.nextElementSibling) {
parent.removeChild(el.nextElementSibling);
}
}
class UpSlide {
constructor(options) {
this.el = options.el;
this.options = Object.assign({}, DEFAULT_OPTION, options);
this.changeStatus = 0;
this.currentContents = null;
const { inTime, pauseTime, outTime } = this.options;
this.totalTime = inTime + pauseTime + outTime;
this.inPausePercent = (inTime + pauseTime) / this.totalTime;
this.animationstartEvent = this.animationstartEvent.bind(this);
this.animationendEvent = this.animationendEvent.bind(this);
this.mouseenterEvent = this.mouseenterEvent.bind(this);
this.mouseleaveEvent = this.mouseleaveEvent.bind(this);
this.init();
}
createItems(datas, baseDelay = 0) {
const { className, animationInClass, animationClass, inTime } = this.options;
const { totalTime, inPausePercent } = this;
const fragment = document.createDocumentFragment();
datas.forEach((c, i) => {
const newEl = document.createElement("div");
newEl.dataset.isLast = i === datas.length - 1 ? 1 : 0;
newEl.innerText = c;
newEl.className = className + " " + animationClass;
newEl.style.animationName = animationInClass;
newEl.style.animationDelay = baseDelay + i * totalTime * inPausePercent + "ms";
newEl.style.animationDuration = inTime + "ms";
fragment.appendChild(newEl);
});
return fragment;
}
animationstartEvent(e) {
const { totalTime, inPausePercent } = this;
const { animationInClass } = this.options;
// 开启新的轮回
if (e.animationName === animationInClass && e.target.dataset.isLast == 1) {
this.innerStart(this.currentContents, totalTime * inPausePercent);
}
}
animationendEvent(e) {
const {
animationInClass,
animationPauseClass,
animationOutClass,
className,
animationClass,
pauseTime,
outTime
} = this.options;
const { changeStatus } = this;
const el = e.target;
const parent = el.parentElement;
const animationName = e.animationName;
switch (animationName) {
case animationInClass:
el.style.animationName = animationPauseClass;
el.style.animationDuration = pauseTime + "ms";
el.style.animationDelay = "0ms";
break;
case animationPauseClass:
el.style.animationName = animationOutClass;
el.style.animationDuration = outTime + "ms";
el.style.animationDelay = "0ms";
// 切换
if (changeStatus === 1) {
clearSiblings(el);
// 标记
el.classList.add(DELETING_CLASS_NAME);
// 切换
this.innerStart(this.currentContents, 0);
this.changeStatus = 0;
}
break;
case animationOutClass:
e.target.classList.remove(animationClass);
e.target.style.animationDelay = "";
if (el.classList.contains(DELETING_CLASS_NAME)) {
parent.removeChild(el);
}
// 轮回结束-清除节点
if (e.target.dataset.isLast == 1) {
const parent = e.target.parentElement;
const delItems = parent.querySelectorAll(
`.${className}:not(.${animationClass})`
);
if (delItems.length > 0) {
for (let i = delItems.length - 1; i >= 0; i--) {
parent.removeChild(delItems[i]);
}
}
}
break;
default:
break;
}
}
mouseenterEvent() {
const { className } = this.options;
this.el.querySelectorAll("." + className).forEach(el => {
el.style.animationPlayState = "paused";
});
}
mouseleaveEvent() {
const { className } = this.options;
this.el.querySelectorAll("." + className).forEach(el => {
el.style.animationPlayState = "running";
});
}
init() {
const { el } = this;
el.addEventListener("animationstart", this.animationstartEvent);
el.addEventListener("animationend", this.animationendEvent);
const { pauseOnFocus } = this.options;
if (pauseOnFocus === true) {
el.addEventListener("mouseenter", this.mouseenterEvent);
el.addEventListener("mouseleave", this.mouseleaveEvent);
}
}
innerStart(content, delay = 0) {
this.currentContents = content;
const c = this.createItems(content, delay);
this.el.appendChild(c);
}
start(content, delay = 0) {
if (this.currentContents != null) {
this.changeStatus = 1;
this.currentContents = content;
return;
}
this.innerStart(content, delay);
}
destroy() {
this.el.removeEventListener("animationstart", this.animationstartEvent);
this.el.removeEventListener("animationend", this.animationendEvent);
const { pauseOnFocus } = this.options;
if (pauseOnFocus === true) {
el.removeEventListener("mouseenter", this.mouseoverEvent);
el.removeEventListener("mouseleave", this.mouseleaveEvent);
}
this.el.innerHTML = null;
this.el = null;
this.options = null;
}
}
标签：如何 mouseover btn inner 支持 length sel 比较 ==
原文地址：https://www.cnblogs.com/cloud-/p/11402598.html
