来看两道题目
题目1：
async function async1() {
console.log('async1 start');
await async2();
console.log('async1 end');
}
async function async2() {
console.log('async2');
}
console.log('script start');
setTimeout(function() {
console.log('setTimeout');
}, 0)
async1();
new Promise(function(resolve) {
console.log('promise1');
resolve();
}).then(function() {
console.log('promise2');
})
console.log('script end');
题目详解参见
https://www.qdfuns.com/article/18271/88153fb28368c185faf062b88ed62e5a.html?tdsourcetag=s_pcqq_aiomsg
题目二：
console.log('1');
setTimeout(function() {
console.log('2');
new Promise(function(resolve) {
console.log('3');
resolve();
}).then(function() {
console.log('4');
})
})
new Promise(function(resolve) {
console.log('5');
resolve();
}).then(function() {
console.log('6');
})
setTimeout(function() {
console.log('7');
})
setTimeout(function() {
console.log('8');
new Promise(function(resolve) {
console.log('9');
resolve();
}).then(function() {
console.log('10');
})
})
new Promise(function(resolve) {
console.log('11');
resolve();
}).then(function() {
console.log('12');
})
console.log('13');
题目Event Loop原理详解
https://www.cnblogs.com/hity-tt/p/6733062.html
