思路
给定一段 url 地址,取出后面的参数转换成参数对象,然后再通过 key 找到对应的 value
方法一
let url = 'https://xxxx.com?a=1&b=2&c=&d'
function fn(url, key) {
let arr = url.substr(url.indexOf('?')+1).split('&')
let newObj = arr.reduce((obj, item)=>{
obj[item.split('=')[0]] = item.split('=')[1]
return obj
}, {})
return newObj[key]
}
console.log(fn(url, 'd')) // undefined
方法二
let url = 'https://xxxx.com?a=1&b=2&c=zs&d=李';
function p_urlParse(url, key) {
let obj = {};
let reg = /[?&][^?&]+=[^?&]+/g;
let arr = url.match(reg);
if (arr) {
arr.forEach((item) => {
let tempArr = item.substring(1).split('=');
let key = decodeURIComponent(tempArr[0]);
let val = decodeURIComponent(tempArr[1]);
obj[key] = val;
})
}
return obj[key];
};
console.log(p_urlParse(url, 'c')) // 'zs'