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URLSearchParams 浏览器兼容性可以参考 MDN（https://developer.mozilla.org…）使用方法如下：
var paramsString = “q=URLUtils.searchParams&topic=api”;
var searchParams = new URLSearchParams(paramsString);
//Iterate the search parameters.
for (let p of searchParams) {
console.log(p);
}
searchParams.has(“topic”) === true; // true
searchParams.get(“topic”) === “api”; // true
searchParams.getAll(“topic”); // [“api”]
searchParams.get(“foo”) === null; // true
searchParams.append(“topic”, “webdev”);
searchParams.toString(); // “q=URLUtils.searchParams&topic=api&topic=webdev”
searchParams.set(“topic”, “More webdev”);
searchParams.toString(); // “q=URLUtils.searchParams&topic=More+webdev”
searchParams.delete(“topic”);
searchParams.toString(); // “q=URLUtils.searchParams”
JavaScript 原生实现
function getParameterByName(name, url) {
if (!url) url = window.location.href;
name = name.replace(/[\[\]]/g, ‘\\$&’);
var regex = new RegExp(‘[?&]’ + name + ‘(=([^&#]*)|&|#|$)’),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return ”;
return decodeURIComponent(results[2].replace(/\+/g, ‘ ‘));
}
// 使用方法
// 如果查询参数为?foo=chuangke&bar=&baz
var foo = getParameterByName(‘foo’); // “chuangke”
var bar = getParameterByName(‘bar’); // “” (present with empty value)
var baz = getParameterByName(‘baz’); // “” (present with no value)
var qux = getParameterByName(‘qux’); // null
