JavaScript_Html5_LocalStorage项目demo

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~~

    原文作者:明明lucky
    原文地址: https://segmentfault.com/a/1190000007716437
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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