实现网站自动监听更新

实现网站自动监听更新

新建 auto-update.js

let lastSrcs; // 上一次获取到的script地址

const scriptReg = /\<script.*src=["'](?<src>[^"']+)/gm;

/**
 * 获取最新页面中的script链接
 */
async function extractNewScripts() {
    const html = await fetch('/?_timestamp=' + Date.now()).then((resp) =>
        resp.text()
    );
    scriptReg.lastIndex = 0;
    let result = [];
    let match;
    while ((match = scriptReg.exec(html))) {
        result.push(match.groups.src);
    }
    return result;
}

async function needUpdate() {
    const newScripts = await extractNewScripts();
    if (!lastSrcs) {
        lastSrcs = newScripts;
        return false;
    }
    let result = false;
    if (lastSrcs.length !== newScripts.length) {
        result = true;
    }
    for (let i = 0; i < lastSrcs.length; i++) {
        if (lastSrcs[i] !== newScripts[i]) {
            result = true;
            break;
        }
    }
    lastSrcs = newScripts;
    return result;
}

const DURATION = 2000;

function autoRefresh() {
    setTimeout(async () => {
        const willUpdate = await needUpdate();
        if (willUpdate) {
            const result = confirm('页面有更新，点击确定刷新页面');
            if (result) {
                location.reload();
            }
        }
        autoRefresh();
    }, DURATION);
}

autoRefresh();

在 main.js 中引入即可

import {createApp} from 'vue'
import './style.css'
import App from './App.vue'
import './utils/auto-update.js'

createApp(App).mount('#app')