javascript
const { writeFile, mkdir, existsSync } = require('fs')
// 动态生成版本号
const createVersion = () => {
// mkdir('./dist', { recursive: true }, (err) => {
//检测dist目录是否存在
if (existsSync('./dist')) {
writeFile(`./dist/version.json`, `{"version":"${Date.now()}"}`, (err) => {
if (err) {
console.log('写入version.json失败')
console.log(err)
} else {
console.log('写入version.json成功')
}
})
} else {
setTimeout(createVersion, 1000)
}
// })
}
setTimeout(createVersion, 10000)
以下两种方式都需要在vue.config.js里加上上面这段代码
第一种
javascript
// auto-update.js
/*
* @Description: 自动更新
*/
import Vue from 'vue'
import Modal from './updateModal.vue'
let currentVersion // 当前版本
let hidden = false // 页面是否隐藏
let setTimeoutId
// 获取版本号
const getVersion = async () => {
return fetch(process.env.VUE_APP_BASE_URL + 'version.json?timestep=' + Date.now()).then(res => res.json())
}
// 检查更新
const checkUpdate = async () => {
const version = (await getVersion()).version
if (Number(version) > Number(currentVersion)) {
const result = confirm('发现新版本,点击确定更新')
if (result) {
location.reload() // 刷新当前页
}
}
}
// 自动更新
const autoUpdate = async () => {
setTimeoutId = setTimeout(async () => {
console.log(setTimeoutId, '这是个检查自动更新的定时器')
// 页面隐藏了就不检查更新
if (!hidden) {
checkUpdate()
}
autoUpdate()
}, 10 * 1000)
}
// 停止检测更新
const stop = () => {
if (setTimeoutId) {
clearTimeout(setTimeoutId)
setTimeoutId = ''
}
}
// 开始检查更新
const start = async () => {
currentVersion = (await getVersion()).version
autoUpdate()
// 监听页面是否隐藏
document.addEventListener('visibilitychange', () => {
console.log(document.hidden, '能监听到啥')
hidden = document.hidden
if (hidden) {
stop()
} else {
checkUpdate()
autoUpdate()
}
})
}
export default { start }
第二种
javascript
// update.worker.js, 我放在了public下
let currentVersion // 当前版本
let hidden = false // 页面是否隐藏
let setIntervalId
// 获取版本号
const getVersion = async () => {
// return fetch('http://localhost:8080/version.json?timestep=' + Date.now()).then(res => res.json())
// const url = window.location.origin // 无法读取window
return fetch('https://xxxx.com/version.json?timestep=' + Date.now()).then(res => res.json(), { cache: 'no-store' })
}
// 检查更新
const checkUpdate = async () => {
let isUpdate = false
const version = (await getVersion()).version
if (Number(version) > Number(currentVersion)) {
console.log('发现新版本,点击确定更新--update.worker.js')
return (isUpdate = true)
} else {
return (isUpdate = false)
}
}
// 停止检测更新
const stop = () => {
if (setIntervalId) {
clearInterval(setIntervalId)
setIntervalId = ''
}
}
self.onmessage = async event => {
var data = event.data
currentVersion = (await getVersion()).version
if (data.pageVisibility) {
stop()
return
}
setIntervalId = setInterval(async () => {
const isUpdate = await checkUpdate()
if (isUpdate) {
stop()
self.postMessage({
isUpdate: true
})
}
}, 5 * 1000)
console.log(data, '子线程worker.js')
}
随便一个全局文件里使用下面代码
javascript
var worker = new Worker('http://localhost:8080/update.worker.js')
const url = window.location.origin
var worker = new Worker(url + 'update.worker.js')
// var worker = new Worker('/update.worker.js')
let data = { pageVisibility: false }
worker.postMessage(data)
worker.onmessage = function(event) {
console.log(event.data, 'worker主线程1')
if (event.data?.isUpdate) {
// const result = confirm('发现新版本,点击确定更新')
// if (result) {
// // location.reload(true) // 刷新当前页
// // window.location.reload(true)
// window.location.replace(window.location.href)
// }
Notification({
title: '页面更新提示',
message: '网页内容有更新,请按shift+F5刷新页面',
duration: 0,
type: 'success',
onClose: () => {}
})
worker.terminate()
}
}
worker.onerror = function(event) {
console.log(event)
// console.error(event.filename + ':' + event.message)
//如果发生错误,立即终止代码
worker.terminate()
}
// 监听页面是否隐藏
document.addEventListener('visibilitychange', () => {
console.log(document.hidden, '能监听到啥-html')
let hidden = document.hidden
data.pageVisibility = hidden
})