js新增/修改/删除url地址参数名称

功能需求：当前url链接通过js实现动态新增/修改/删除来改变当前的参数。

1、新增url参数方法

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; 
        } 
    }
}
//调用方法
var url = window.location.href; 
var link = changeURLArg(url, "tags", '中国'); 
window.location.href = link

2、修改url参数方法

function replaceParamVal(paramName,replaceWith) {
    var oUrl = this.location.href.toString();
    var re=eval('/('+ paramName+'=)([^&]*)/gi');
    var nUrl = oUrl.replace(re,paramName+'='+replaceWith);
    this.location = nUrl;
	window.location.href=nUrl
}

3、删除url参数方法

function funcUrlDel(name){
    var loca = window.location;
    var baseUrl = loca.origin + loca.pathname + "?";
    var query = loca.search.substr(1);
    if (query.indexOf(name)>-1) {
        var obj = {}
        var arr = query.split("&");
        for (var i = 0; i < arr.length; i++) {
            arr[i] = arr[i].split("=");
            obj[arr[i][0]] = arr[i][1];
        };
        delete obj[name];
        var url = baseUrl + JSON.stringify(obj).replace(/[\"\{\}]/g,"").replace(/\:/g,"=").replace(/\,/g,"&");
        return url
    };
}