es8 - async await - 4.js

es8 - async await - 4.js

function promise() {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            console.log('1. First thing setting up second thing');
            resolve();
        }, 1000)
    })
    .then(() => {
        return new Promise((resolve, reject) => {
            setTimeout(() => {
                console.log('2. Second thing setting up third thing');
                resolve();
            }, 1000)
        })
    })
    .then(() => {
        return new Promise((resolve, reject) => {
            setTimeout(() => {
                console.log('3. Third thing setting up fourth thing');
                resolve();
            }, 1000)
        })
    })
    .then(() => {
        return new Promise((resolve, reject) => {
            setTimeout(() => {
                console.log('4. Fourth thing setting up fifth thing');
                resolve();
            }, 1000)
        })
    })
    .then(() => {
        return new Promise((resolve, reject) => {
            setTimeout(() => {
                console.log('5. Fifth thing');
                resolve();
            }, 1000)
        })
    })
    .catch(error => {
        console.log(`It's all a big mistake.`);
    })
    .finally(() => {
        console.log('End');
    })
}
promise();