?// 添加参数&key=value 直接输出url ?function insertParam(key, value){ key = encodeURI(key); value = encodeURI(value); var kvp = document.location.search.substr(1).split('&'); var i=kvp.length; var x; while(i--) ?{ x = kvp[i].split('='); if (x[0]==key) { x[1] = value; kvp[i] = x.join('='); break; } } if(i<0) {kvp[kvp.length] = [key,value].join('=');} document.location.search = kvp.join('&'); }//直接把参数添加到尾部function addParameterToURL(param){ _url = location.href; _url += (_url.split('?')[1]? '&':'?') + param; return _url;}// 判断& ? 在后面选择性添加var addUrlParam = function(search, key, val){ var newParam = key + '=' + val, params = '?' + newParam; if (search) { params = search.replace(new RegExp('[?&]' + key + '[^&]*'), '$1' + newParam); if (params === search) { params += '&' + newParam; } } return params;};var yl_url=document.location.host + addUrlParam(document.location.search, 'foo', 'bar');url后面添加参数,注意&?的添加方式
原文地址：https://www.cnblogs.com/fangdongdemao/p/url.html