function getAllUrlParams(url) { ???// get query string from url (optional) or window ???var queryString = url ? url.split('?')[1] : window.location.search.slice(1); ???// we'll store the parameters here ???var obj = {}; ???// if query string exists ???if (queryString) { ???????// stuff after # is not part of query string, so get rid of it ???????queryString = queryString.split('#')[0]; ???????// split our query string into its component parts ???????var arr = queryString.split('&'); ???????for (var i = 0; i < arr.length; i++) { ???????????// separate the keys and the values ???????????var a = arr[i].split('='); ???????????// in case params look like: list[]=thing1&list[]=thing2 ???????????var paramNum = undefined; ???????????var paramName = a[0].replace(/\[\d*\]/, function (v) { ???????????????paramNum = v.slice(1, -1); ???????????????return ''; ???????????}); ???????????// set parameter value (use 'true' if empty) ???????????var paramValue = typeof (a[1]) === 'undefined' ? true : a[1]; ???????????// if parameter name already exists ???????????if (obj[paramName]) { ???????????????// convert value to array (if still string) ???????????????if (typeof obj[paramName] === 'string') { ???????????????????obj[paramName] = [obj[paramName]]; ???????????????} ???????????????// if no array index number specified... ???????????????if (typeof paramNum === 'undefined') { ???????????????????// put the value on the end of the array ???????????????????obj[paramName].push(paramValue); ???????????????} ???????????????// if array index number specified... ???????????????else { ???????????????????// put the value at that index number ???????????????????obj[paramName][paramNum] = paramValue; ???????????????} ???????????} ???????????// if param name doesn't exist yet, set it ???????????else { ???????????????obj[paramName] = paramValue; ???????????} ???????} ???} ???return obj;};var x = getAllUrlParams('http://127.0.0.1:5000/app/index.html?code=KXMvRUkC92WaJ6n3vELMU3iK2128879&state=').code;console.log(x);js获取url上的指定参数
原文地址：https://www.cnblogs.com/datiangou/p/10206259.html