获取url参数的几种方式

// 方法一：function getLocationValue1(propName){    var qs = location.search;    // 去掉问号    qs = qs.substring(1);    // 定义数组保存每个name-value对    var name_value_Array = qs.split('&');    // 分别存储名字和值    var nameArray = [],        valueArray = [];    for (var i = 0; i < name_value_Array.length; i++) {        // 将name_value_Array的每个项的名字和值压栈到相应的数组        // 取到rsv_spt=1 这样的数组 ['rsv_spt','1']        var temp = name_value_Array[i].split('=');        nameArray.push(temp[0]);        valueArray.push(temp[1]);    }    // 获取到传入参数名字的对应的值    for (var i = 0; i < nameArray.length; i++) {        if (nameArray[i] === propName) {            return valueArray[i];        }    }    return 0;}console.log(getLocationValue1('wd'));// https://www.baidu.com/s?wd=mac关闭屏幕&rsv_spt=1&rsv_iqid=0xc640c36e00018822&issp=1&f=3&rsv_bp=0&rsv_idx=2&ie=utf-8&tn=baiduhome_pg&rsv_enter=1&rsv_sug3=11&rsv_sug1=10&rsv_sug2=0&prefixsug=mac%25E5%2585%25B3%25E9%2597%25AD&rsp=2&inputT=5090&rsv_sug4=5745//方法二:    function getLocationValue2(propName){        // 防止出错        var qs = (location.search.length? location.search.substring(1) : ''),            obj = {}, //放args            arr = qs.length ? qs.split('&') : []; //放键值对,若qs长度为0则arr为[]            for (var i = 0; i < arr.length; i++){                var name = decodeURIComponent(arr[i].split('=')[0]), //解码                    value = decodeURIComponent(arr[i].split('=')[1]);                    obj[name] = value;            }            if (obj[propName]) {                return obj[propName];            } else {                return 0;            }    }console.log(getLocationValue2('wd'));