worker

https://www.ruanyifeng.com/blog/2018/07/web-worker.html

用法

mywork.js

setInterval(() => {
    // 不随浏览器切换页签或页签最小化，影响计时准确性
    console.log('worker time', new Date().toLocaleTimeString())
}, 1000);

<script>
    var worker = new Worker('mywork.js');

    setInterval(() => {
        console.log('html time', new Date().toLocaleTimeString())
    }, 1000);
</script>

worker通信

postmassage