执行流程： 宏任务和微任务（一个宏任务配多个微任务）：每次执行微任务队列会全部执行完并清空 console.log(‘main‘ ) process.nextTick( () = { console.log( ‘process.nextTick1‘ ) }) setTimeout(()
执行流程：
宏任务和微任务（一个宏任务配多个微任务）：每次执行微任务队列会全部执行完并清空
console.log(‘main‘)
process.nextTick( () => { console.log(‘process.nextTick1‘) }) setTimeout(() => { console.log(‘setTimeout‘) process.nextTick(() => { console.log(‘process.nextTick2‘) }) }, 0) new Promise((resolve, reject) => { console.log(‘promise‘) resolve() }).then(() => { console.log(‘promise then‘) }) console.log(‘main2‘)
执行结果
main
promise
main2
process.nextTick1
promise then
setTimeout
process.nextTick2
图示：
