JS如何获取URL中的Query参数

目录JS获取URL的Query参数需求描述实现一实现二JS获取URL上的指定参数总结JS获取URL的Query参数需求描述获取URL中的Query参数，例如：https://www.examp...

目录

JS获取URL的Query参数

需求描述

获取 URL 中的 Query 参数，例如：

https://www.example.com/test.html?a=param1&b=param2

代码片段

实现一

使用URLSearchParams对象，兼容性见Can I use

const urlString = 'https://www.example.com/test.html?a=param1&b=param2';
const urlObj = new URL(urlString);
const [a, b] = urlObj.searchParams.values();

实现二

function parseSearchParams(searchParamsString){
    return searchParamsString.split('&').reduce((searchParams, curKV)=>{
        const [k, v] = curKV.split('=').map(decodeURIComponent);
        searchParams[k] = v;

        return searchParams;
    }, {});
}

JS获取URL上的指定参数

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[paramNphpame]];
}
// 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);

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。