js修改url中某个指定的参数的值

版权声明： https://blog.csdn.net/qq_35193093/article/details/87697770

function changeURLArg(url,arg,arg_val){
    var pattern=arg+'=([^&]*)';
    var replaceText=arg+'='+arg_val;
    if(url.match(pattern)){
        var tmp='/('+ arg+'=)([^&]*)/gi';
        tmp=url.replace(eval(tmp),replaceText);
        return tmp;
    }else{
        if(url.match('[\?]')){
            return url+'&'+replaceText;
        }else{
            return url+'?'+replaceText;
        }
    }
    return url+'\n'+arg+'\n'+arg_val;
}

changeURLArg('http://www.haha.com/test.html?class_id=3&id=2','stu_id',4);

http://www.haha.com/test.html?stu_id=4&id=2