SOURCE

async function func1(){
    console.log('func1 start')
    await func2()
    console.log('func1 end')
}
async function func2(){
    console.log('func2')
}
console.log('script start')
setTimeout(function(){
 console.log('timeout')
}, 0)

func1()

new Promise(function(resolve){
    console.log('promise1')
    resolve()
}).then(function(){
    console.log('promise1 then')
})

console.log('script end')

setTimeout(function(){
    console.log('out1')
    new Promise((resolve)=>{
        console.log('promise1')
        resolve()})
        .then(()=>console.log('1'))
}, 0)

setTimeout(function(){
    console.log('out2')
    new Promise((resolve)=>{
        console.log('promise2')
        resolve()})
    .then(()=>console.log('2'))} 
,0)