获取url地址？后面传递的参数

let url="http://www.zidingyi.com/index.html?lx=2&name=sr&val=aaa";
拿到以下结果
/*

• {
• lx="2",
• name="sr",
• val="aaa"
• }
  */

第一种方式

// 1.获取问好后面的值
let  askIndex=url.indexOf("?")
console.log(askIndex) //?的索引
let askText=url.substr(askIndex+1)
console.log(askText) //获取到值 lx=2&name=sr&val=aaa

//2 将lx=2&name=sr&val=aaa用数组拆分

let splitText = askText.split("&")
console.log(splitText) //=>["lx=2", "name=sr", "val=aaa"]

//3 将["lx=2", "name=sr", "val=aaa"]用：分隔
let result={}
splitText.forEach((item,index)=>{
    let n = item.split("=")
    let key =n[0];
    let value =n[1];
    result[key]=value;
});
console.log(result) //=> {lx: "2", name: "sr", val: "aaa"}

第二种方式基于正则封装

let url="http://www.zidingyi.com/index.html?lx=2&name=sr&val=aaa#rrr";
function queryURLParams(url) {
    let result={}
        reg1=/([^?=&#]+)=([^?=&#]+)/g,
        reg2=/#([^?=&#]+)/g;
    url.replace(reg1,(n,x,y)=>result[x]=y);
    url.replace(reg2,(n,x)=>result['HASH']=x);
    return result
}
let paramsObj=queryURLParams(url)
console.log(paramsObj)  //=>{lx: "2", name: "sr", val: "aaa", HASH: "rrr"}