# 簡介 模擬其他編程語言實現 sleep 函數。它能讓程序掛起一段時間，然后再執行下面的邏輯。 <br> <br> # 實現 ~~~ function sleep (time) { return new Promise(resolve => { setTimeout(resolve, time) }) } ~~~ <br> <br> # 調用 ## es6 ~~~ console.log('Do some thing, ' + new Date()); sleep(3000).then(() => { console.log('Do other things, ' + new Date()); }) ~~~ <br> ## es7 ~~~ (async () => { console.log('Do some thing, ' + new Date()) await sleep(3000) console.log('Do other things, ' + new Date()) })() ~~~