JavaScript 獲取地址欄指定參數

假如當前地址欄鏈接爲：https://test.com/?type=students&page=3

//獲取參數方法1
function UrlSearch()
{
    var name,value;
    var str=location.href; //取得整個地址欄
    var num=str.indexOf("?");
    str=str.substr(num+1); //取得所有參數   stringvar.substr(start [, length ]

    var arr=str.split("&"); //各個參數放到數組裏
    for(var i=0;i < arr.length;i++){
        num=arr[i].indexOf("=");
        if(num>0){
            name=arr[i].substring(0,num);
            value=arr[i].substr(num+1);
            this[name]=value;
        }
    }
}

var UrlSearch=new UrlSearch();   //實例化
alert(UrlSearch.type);   //students
alert(UrlSearch.page);   //3
alert(UrlSearch.studentid);   //undefined

//獲取參數方法2
function getParameter(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if (r != null) {
        return decodeURI(r[2])
    }
    return null
}

alert(getParameter('type'));   //students
alert(getParameter('page'));   //3
alert(getParameter('studentid'));   //null

原文鏈接：https://tiicle.com/items/340/javascript-to-get-the-address-bar-specified-parameters