js页面取request值

// 假设URL是 http://example.com/?name=John&age=30
const params = new URLSearchParams(window.location.search);
const name = params.get('name'); // "John"
const age = params.get('age');   // "30"

function getQueryParam(param) {
    const queryString = window.location.search.substring(1);
    const paramsArray = queryString.split('&');
    for (let i = 0; i < paramsArray.length; i++) {
        const keyValue = paramsArray[i].split('=');
        if (keyValue[0] === param) {
            return decodeURIComponent(keyValue[1]);
        }
    }
    return null;
}

const name = getQueryParam('name'); // "John"
const age = getQueryParam('age');   // "30"

const express = require('express');
const bodyParser = require('body-parser');
const app = express();

app.use(bodyParser.urlencoded({ extended: true }));

app.post('/submit-form', (req, res) => {
    const formData = req.body;
    // 处理表单数据...
    res.send(formData); // 将数据发送回客户端
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

fetch('/submit-form', {
    method: 'POST',
    headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: new URLSearchParams({ name: 'John', age: 30 })
})
.then(response => response.json())
.then(data => {
    console.log(data); // { name: "John", age: "30" }
});