window.location.search.substr(1)
其中window.location.search返回的是?及?后的字符串
substr
分割字符串,substr(1)
即返回从第1个字符开始的字符串
location.href.slice(window.location.href.indexOf("?")+1)
//或者
location.search.slice(1)
var params = new URLSearchParams(window.location.search.substr(1));
//方法1:has(),返回布尔值,传入参数的键
//举例:
var str1 = "id=123&psw=456"
var params = new URLSearchParams(str1);
params.has("id")//返回true
params.has("item")//返回false
//方法1:get(),传入参数的键,返回参数的值
//举例
var str2 = "id=123&psw=456"
var params = new URLSearchParams(str2);
var id = params.get("id")//id为123
var psw = params.get("psw ")//psw 为456