标签:rom js async instant sync date after div style out
function resolveAfter2Seconds() { console.log(‘starting slow promise at:‘+ new Date().getSeconds()) return new Promise(resolve => { setTimeout(() => { resolve(‘slow‘) console.log(‘slow promise is done at:‘+ new Date().getSeconds()) }, 2000 ) }) } function resolveAfter1Second() { console.log(‘starting fast promise at:‘+ new Date().getSeconds()) return new Promise(resolve => { setTimeout(() => { resolve(‘fast‘) console.log(‘fast promise is done at:‘+ new Date().getSeconds()) }, 1000 ) }) } const concurrentStart = async function(){ console.log(‘==CONCURRENT START WITH await == at:‘+ new Date().getSeconds()) const slow = resolveAfter2Seconds() const fast = resolveAfter1Second() // Executon gets here almostinstantly console.log(await slow + ‘ at: ‘+new Date().getSeconds()) console.log(await fast + ‘ at: ‘+new Date().getSeconds()) } concurrentStart()
//
starting slow promise at:33
starting fast promise at:33
fast promise is done at:34
slow promise is done at:35
slow at: 35
fast at: 35
标签:rom js async instant sync date after div style out
原文地址:https://www.cnblogs.com/anch/p/12200416.html