项目中localStorage实用
项目中h5本地存储的一个小实用,本意使用cookie,但发现chrome调试被禁用,便用了localStorage.
此需求是一贴吧搜索页,在新用户第一次点击搜索框时为搜索页面,老用户点击搜索框时带有搜索记录,实现方法为在点击搜索按钮时便为用户创建一个本地存储localStorage user-data,判断当页面中含有user-data时便将搜索框的val追加进user-data中,以“|”隔开,若user-data不存在便创建user-data。
var storage=window.localStorage;
if(storage.getItem("user-data")){
var str=storage.getItem("user-data");
storage.setItem("user-data",str+‘|‘+$(‘#keyword‘).val());
}else{
storage.setItem("user-data",$(‘#keyword‘).val());
}
当页面加载时若本地localStorage中含有user-data,则获取此数据,返回为字符串,用split方法以“|”为判断条件将此字符串切割为数组,并循环创建,导入页面编辑器中,即:
if($(‘.search-con‘) && !findKey(‘keyWords‘)){
var html="";
if(window.localStorage && localStorage.getItem("user-data")){
var data=localStorage.getItem("user-data").split(‘|‘);
for(var i=data.length-1;i>=0;i--){
html+="<div class=‘user-his‘>"+data[i]+"</div>"
}
$(‘.user-clear‘).show();
}else{
html=‘<i class="iconfont icon-wenbensousuo"></i><br><span>未搜索任何信息</span>‘
}
$(‘.search-con‘).html(html);
}
其中findKey()方法为判断路径中是否含有搜索关键字keyWords,需求是当含有搜索关键字时显示为搜索结果,无需关注。
function findKey(name){
var str=window.location.href;
return str.indexOf(name)==-1?false:true;
}
点击清除搜索记录时清除user-data,即:
localStorage.removeItem("user-data");
点击搜索时将搜索框val拼入路径,页面刷新获取后台数据,减少ajax请求,search.html为相对路径,即是当前文件名即可:
window.location.href=‘search.html?keyWords=‘+encodeURI($(‘#keyword‘).val());
实现此需求只需后端一个页面即可(我们后端为asp.net),贴出完整测试代码:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="Cache-Control" content="no-cache">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0">
<meta content="black" name="apple-mobile-web-app-status-bar-style">
<meta content="yes" name="apple-mobile-web-app-capable">
<link href="http://img.pccoo.cn/wap/webapp/font/iconfont.css" rel="stylesheet">
<script type="text/javascript" src="http://img.pccoo.cn/wap/js2/jquery.js?v1.0"></script>
<title>论坛搜索</title>
<style>
/*2016-12-1 wm*/
*{padding:0;margin:0;}
li{list-style: none}
input{outline: none}
.s-content{background:#fff;padding:10px;position:relative;height:30px;border-bottom:1px solid #e5e5e5;}
.sear-wrap{display:-webkit-box;display:flex;width:80%;padding:5px; border-radius:20px;background:#f0f0f0;position:absolute;top:20%;left:10px;z-index:9;}
.sear-wrap input[type=text] { display:block;-webkit-box-flex:1;flex:1;height:24px;line-height:24px;color:#666;border:none;background:none;text-indent:10px;}
.s-content .tishi{position:absolute;right:10px;top:16px;color:#09f;font-size: 14px}
.search-con{width: 100%;background: #fff;text-align: center;}
.search-con i{margin-top:100px;font-size: 80px;background: #f0f0f0;border-radius: 50%;width: 160px;height: 160px;display: inline-block;line-height: 160px;color:#ddd;}
.search-con span{margin-top:10px;color:#ccc;display: inline-block;}
.search-con .user-his{width: 100%;height: 40px;color:#333;line-height: 40px;text-align:left;padding-left:10px;font-size: 16px;border-bottom:1px solid #eee;}
.user-clear{width: 90px;height: 30px;border-radius: 10px;font-size:14px;color:#09f;border:1px solid #09f;margin:20px auto;line-height: 30px;padding:0 10px;display: none}
#span_search{width:30px;text-align: center;}
#span_search i{color:#ccc;}
#span_search i.icon-guanbi1{color:#ccc;}
.srhword {position: absolute;top: 100px;border-radius: 0 0 3px 3px;width: 95%;z-index: 20;background: #fff;overflow-y: auto;_display: none;padding:10px 10px 40px;}
.srhword li{padding:0px 0 10px;border-bottom:1px solid #eee;}
.srhword .end-title{color:#999;margin:10px 0;font-size: 16px;border:none;}
.srhword span{color:red;}
.srhword .p1{color:#333;font-size: 16px;line-height: 26px;word-break: break-all;text-overflow: ellipsis;display: -webkit-box;-webkit-box-orient: vertical; -webkit-line-clamp: 2;overflow: hidden; }
.srhword .p2{color:#ccc;font-size: 12px;margin-top:10px;position:relative;}
.srhword .p2 i{font-size: 12px;margin-right:10px;}
.srhword .p2 em{position:absolute;right:10px;}
.load-more{position:absolute;bottom:0;left:0;line-height: 40px;text-align: center;width: 100%;background: #f0f0f0;}
.load-more img{vertical-align: middle;}
header dl dd.right-search{position:absolute;top:0;right:80px;}
header dl dd.right-search i{font-size: 37px;color:#fff;}
</style>
</head>
<body>
<section class="s-content">
<form action="" method="get">
<div class="sear-wrap">
<input type="text" class="inp_srh" name="keyword" id="keyword" placeholder="请输入帖子关键词" maxlength="20">
<span id="span_search"><i class="iconfont icon-search1"></i></span>
</div>
<span class="tishi">搜索</span>
</form>
</section>
<section class="search-con">
<!-- <i class="iconfont icon-search1"></i>
<br>
<span>未搜索任何信息</span> -->
<!-- <div class="user-his">范冰冰</div> -->
</section>
<div class="user-clear">清除搜索记录</div>
<!-- <div class="load-more">加载更多</div> -->
<script>
//判断页面地址中是否含有key
if(findKey("keyWords")){
$(document).find(‘.search-con‘).attr(‘class‘,‘srhword‘).removeClass(‘search-con‘);
var key=window.location.search;
$(‘.srhword‘).html(‘<li class="end-title">关于<span> "汽车" </span>的搜索结果</li> <!-- <li class="end-title">未找到关于<span> "汽车" </span>的相关信息</li> --> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村,</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村,</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村,</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村,</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村,</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村悄悄的进村悄悄的进村悄悄的进村悄悄的进村,悄悄的进村,悄悄的进村,</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> <li> <p class="p1">悄悄的进村,<span>汽车</span>悄悄的进村,悄悄的进村</p> <p class="p2"><i class="iconfont icon-touxiang"> 抹脸花看</i><i class="iconfont icon-xiaoxi2"> 23</i> 2分钟前</p> </li> ‘)
$(‘.srhword‘).append(‘<div class="load-more">加载更多</div>‘);
// match(/aaa(\S*)/)[1]
key=key.match(/=(\S*)/)[1];
$.ajax({
url:‘‘,
type:‘get‘,
autoChange: true,
data: { ‘key‘: key},
success:function(data){
},
error:function(){}
})
}
//判断网页地址中是否包含key
function findKey(name){
var str=window.location.href;
return str.indexOf(name)==-1?false:true;
}
//点击清除清空输入框内容
$(‘#span_search‘).on(‘click‘,function(){
if($(‘#span_search‘).find("i").hasClass("icon-guanbi1")){
$("#keyword").val("");
$(‘#span_search i‘).removeClass(‘icon-guanbi1‘).addClass(‘icon-search1‘);
}
})
//输入内容时显示清除按钮
$(‘#keyword‘).keyup(function(){
$(‘#span_search i‘).removeClass(‘icon-search1‘).addClass(‘icon-guanbi1‘);
})
//判断如果有本地数据缓存生成列表
if($(‘.search-con‘) && !findKey(‘keyWords‘)){
var html="";
if(window.localStorage && localStorage.getItem("user-data")){
var data=localStorage.getItem("user-data").split(‘|‘);
for(var i=data.length-1;i>=0;i--){
html+="<div class=‘user-his‘>"+data[i]+"</div>"
}
$(‘.user-clear‘).show();
}else{
html=‘<i class="iconfont icon-wenbensousuo"></i><br><span>未搜索任何信息</span>‘
}
$(‘.search-con‘).html(html);
}
//点击搜索记录刷新页面
$(‘.search-con‘).find(‘div‘).on(‘click‘,function(){
window.location.href=‘search.html?keyWords=‘+encodeURI($(this).text());
})
//点击搜索按钮将搜索内容存入本地
$(‘.tishi‘).on(‘click‘,function(){
if(window.localStorage && $(‘#keyword‘).val()!=""){
var storage=window.localStorage;
if(storage.getItem("user-data")){
var str=storage.getItem("user-data");
storage.setItem("user-data",str+‘|‘+$(‘#keyword‘).val());
}else{
storage.setItem("user-data",$(‘#keyword‘).val());
}
}
// var reg=/\?(.*?)\=/g;
// 将搜索内容传入url刷新页面
if($(‘#keyword‘).val()!=""){
window.location.href=‘search.html?keyWords=‘+encodeURI($(‘#keyword‘).val());
}
})
//点击清除本地存储
$(‘.user-clear‘).on(‘click‘,function(){
localStorage.removeItem("user-data");
$(‘.search-con‘).remove("div");
$(this).hide();
window.location.href=window.location.href;
})
//滑动加载下一页
if($(‘.load-more‘) && $(‘.load-more‘).offset().top<$(window).height()){
$(‘.srhword‘).find(‘.load-more‘).html(‘没有更多内容了。。‘)
}
$(window).scroll(function(){
if($(document).scrollTop()+$(window).height()>=$(‘.load-more‘).offset().top){
var flag=true,
pageIndex=0;
if(!flag)return;
flag=!flag;
pageIndex++;
$(‘.srhword‘).find(‘.load-more‘).html("<img src=‘http://img.pccoo.cn/wap/images/load.gif‘ />正在加载,请稍后…")
$.ajax({
url:‘‘,
type:‘get‘,
autoChange: true,
data: { ‘key‘: key,‘pageIndex‘:pageIndex},
success:function(data){
if(data){
$(‘.srhword‘).find(‘.load-more‘).before(data);
$(‘.srhword‘).find(‘.load-more‘).html(‘滑动加载更多‘)
}else{
$(‘.srhword‘).find(‘.load-more‘).html(‘没有更多内容了。。‘)
}
flag=!flag;
},
error:function(){}
})
}
})
</script>
</body>
</html>
直接复制到本地便可测试,调试状态为移动端效果更佳,如果路径中含有keyWords则为测试数据,将.html后面的数据删除即是搜索页面。
若有疑问或错误,请多多交流,谢谢~~