阿里编程题：实现一个方法，拆解URL参数中queryString

[sisterAn]

入参格式参考：

const url = 'http://sample.com/?a=1&b=2&c=xx&d=#hash';

出参格式参考：

const result = { a: '1', b: '2', c: 'xx', d: '' };
// 拆解URL参数中queryString，返回一个 key - value 形式的 object

[xiaopingbuxiao]

const queryString = (str)=>{
    const obj = {}
    str.replace(/([^?&=]+)=([^&]+)/g, (_, k, v) => (obj[k] = v))
    return obj
}

[JerryWen1994]

function getParams(u: URL) {
  const s = new URLSearchParams(u.search)
  const obj = {}
  s.forEach((v, k) => (obj[k] = v))
  return obj
}

const url = 'http://sample.com/?a=1&b=2&c=xx&d=2#hash';
getParams(new URL(url))

[Planck-Ho]

function getQuery (queryStr) {
    const [, query] = queryStr.split('?')
    if (query) {
        return query.split('&').reduce((pre, cur) => {
            const [key, val] = cur.split('=')
            pre[key] = decodeURIComponent(val)
            return pre
        }, {})
    }
    return {}
}

[7777sea]

const parse = (url) => {
    const l = new URL(url).searchParams;
    const _params = {};
    l.forEach((v,k) => _params[k] = v);
    return _params
} 

[GitYms]

思路

字符串分割拿到参数相关的字符串，再做类型转换

code

const dismantle = (url) => {
     const aimUrl = url.split('?').pop().split('#').shift().split('&');
     const res = {};
     aimUrl.forEach(item => {
          const [key, val] = item.split('=');
          res[key] = val;
     });
     return res;
}

[onlyil]

const parse = (url) => {
    const l = new URL(url).searchParams;
    const _params = {};
    l.forEach((k,v) => _params[k] = v);
   return _params
} 

key 和 val 貌似反了～ @7777sea

[7777sea]

const parse = (url) => {
    const l = new URL(url).searchParams;
    const _params = {};
    l.forEach((k,v) => _params[k] = v);
   return _params
} 

key 和 val 貌似反了～ @7777sea

已经修改～

[guopeng1129972]

const url = 'http://sample.com/?a=1&b=2&c=xx&d=2#hash';

const queryString = (url) => {
let urlStrList = url.split("/?")[1].split('#')[0].split('&')
let urlData={};
for (let [index, urlStr] of urlStrList.entries()) {
let itemList = urlStr.split('=')
urlData[itemList[0]] = decodeURIComponent(itemList[1])
}
return urlData
}
console.log(queryString(url))

@sisterAn 哈喽，
我有个问题，你那个输出的例子为什么要d: '' ？
&d=2#hash
d不应该是2吗？
还有#hash是啥意思？是因为这个d就要取成空了吗？

[hix41]

const queryString = (url) =>
  [...new URL(url).searchParams].reduce((acc, cur) => {
    acc[cur[0]] = cur[1];
    return acc;
  }, {});

[xllpiupiu]

/**
 * url= url = 'http://sample.com/?a=1&b=2&c=xx&d=2#hash';
 */
//使用URL构造函数 使得url具有searchParams属性
const url = 'http://sample.com/?a=1&b=2&c=xx&d=2#hash';
function getUrlParams(url) {
    const urlParams = new URL(url)
    const params = urlParams.searchParams
    console.log('params: ', params);
    const obj = {}
    //使用forEach map只能循环数组吗？？？
    params.forEach((item,index)=>obj[index] = item)
    return obj
}
console.log(getUrlParams(url))
//使用普通的split map循环
function getUrlParams2(url) {
    const indexStart = url.indexOf('?')
    const indexEnd = url.indexOf('#')
    const params = url.slice(indexStart+1,indexEnd)
    let obj = {}
    params.split('&').map(item=>{
        const objParams = item.split('=')
        obj[objParams[0]] = objParams[1]
    })
    return obj
}
console.log(getUrlParams2(url))