我使用了一个名为query-string的外部包来解析url参数，如下所示。

import React, {Component} from 'react'
import { parse } from 'query-string';

resetPass() {
    const {password} = this.state;
    this.setState({fetching: true, error: undefined});
    const query = parse(location.search);
    return fetch(settings.urls.update_password, {
        method: 'POST',
        headers: {'Content-Type': 'application/json', 'Authorization': query.token},
        mode: 'cors',
        body: JSON.stringify({password})
    })
        .then(response=>response.json())
        .then(json=>{
            if (json.error)
                throw Error(json.error.message || 'Unknown fetch error');
            this.setState({fetching: false, error: undefined, changePassword: true});
        })
        .catch(error=>this.setState({fetching: false, error: error.message}));
}

http://localhost:8000/#/signin?id=12345

import React from "react";
import { useLocation } from "react-router-dom";

const MyComponent = () => {
  const search = useLocation().search;
const id=new URLSearchParams(search).get("id");
console.log(id);//12345
}

React路由器v3

使用React Router v3，你可以从this.props.location.search (?qs1=naisarg&qs2=parmar)获取查询字符串。例如，使用let params = queryString.parse(this.props.location.search)，将给出{qs1: 'naisarg'， qs2: 'parmar'}

React路由器v4

在React Router v4中，this.props.location.query不再存在。您需要使用this.props.location.search，并自己或使用现有的包(如query-string)解析查询参数。

例子

下面是一个使用React Router v4和query-string库的最小示例。

import { withRouter } from 'react-router-dom';
import queryString from 'query-string';
    
class ActivateAccount extends Component{
    someFunction(){
        let params = queryString.parse(this.props.location.search)
        ...
    }
    ...
}
export default withRouter(ActivateAccount);

理性的

React Router团队移除query属性的理由是:

There are a number of popular packages that do query string parsing/stringifying slightly differently, and each of these differences might be the "correct" way for some users and "incorrect" for others. If React Router picked the "right" one, it would only be right for some people. Then, it would need to add a way for other users to substitute in their preferred query parsing package. There is no internal use of the search string by React Router that requires it to parse the key-value pairs, so it doesn't have a need to pick which one of these should be "right". [...] The approach being taken for 4.0 is to strip out all the "batteries included" kind of features and get back to just basic routing. If you need query string parsing or async loading or Redux integration or something else very specific, then you can add that in with a library specifically for your use case. Less cruft is packed in that you don't need and you can customize things to your specific preferences and needs.

你可以在GitHub上找到完整的讨论。

据我所知，有三种方法可以做到。

1.使用正则表达式获取查询字符串。

2.您可以使用浏览器api。 图片当前的url是这样的:

http://www.google.com.au?token=123

我们只想得到123;

第一个

 const query = new URLSearchParams(this.props.location.search);

Then

const token = query.get('token')
console.log(token)//123

使用第三个名为“query-string”的库。 首先安装它 NPM I查询字符串 然后导入到当前的javascript文件中: 导入query-string

下一步是在当前url中获取'token'，请执行以下操作:

const value=queryString.parse(this.props.location.search);
const token=value.token;
console.log('token',token)//123

2019年2月25日更新

4. 如果当前url如下所示:

http://www.google.com.au?app=home&act=article&aid=160990

我们定义一个函数来获取参数:

function getQueryVariable(variable)
{
        var query = window.location.search.substring(1);
        console.log(query)//"app=article&act=news_content&aid=160990"
        var vars = query.split("&");
        console.log(vars) //[ 'app=article', 'act=news_content', 'aid=160990' ]
        for (var i=0;i<vars.length;i++) {
                    var pair = vars[i].split("=");
                    console.log(pair)//[ 'app', 'article' ][ 'act', 'news_content' ][ 'aid', '160990' ] 
        if(pair[0] == variable){return pair[1];}
         }
         return(false);
}

我们可以通过以下方式获得“援助”:

getQueryVariable('aid') //160990

let data = new FormData();
data.append('file', values.file);

实际上，没有必要使用第三方库。我们可以用纯JavaScript。

考虑以下URL:

https://example.com?yourParamName=yourParamValue

现在我们得到:

const url = new URL(window.location.href);
const yourParamName = url.searchParams.get('yourParamName');

简而言之

const yourParamName = new URL(window.location.href).searchParams.get('yourParamName')

另一个智能解决方案(推荐)

const params = new URLSearchParams(window.location.search);
const yourParamName = params.get('yourParamName');

简而言之

const yourParamName = new URLSearchParams(window.location.search).get('yourParamName')

注意:

对于有多个值的参数，使用“getAll”而不是“get”

https：//example.com？yourParamName[]=yourParamValue1&yourParamName[]=yourParamValue2

const yourParamName = new URLSearchParams(window.location.search).getAll('yourParamName[]')

结果如下:

["yourParamValue1", "yourParamValue2"]