promise의 이해1

promise의 이해1

func1()

.then(func2)

.then(func3)

.then(func4)

.then(func5)

.then(func6)

.then(func7);

function func1(){

return new Promise((resolve, reject)=>{

console.log('func1실행');

setTimeout(resolve, 2000)

})

}

function func2(){

return new Promise((resolve, reject)=>{

console.log('func2실행');

setTimeout(resolve, 2000)

})

}

function func3(){

return new Promise((resolve, reject)=>{

console.log('func3실행');

setTimeout(resolve, 2000)

})

}

function func4(){

console.log('func4실행');

}

function func5(){

console.log('func5실행');

}

function func6(){

return new Promise((resolve, reject)=>{

console.log('func6-1실행');

//setTimeout(resolve, 2000);

func6_1().then(()=>{

resolve();

})

})

}

function func7(){

console.log('func7실행');

}

function func6_1(){

return new Promise((resolve, reject)=>{

setTimeout(()=>{

console.log('func6_1실행');

resolve();

}, 2000)

})

}