JavaScript implements a sleep() delay function

Achieve effect

Implement a sleep()delay function, for example, it sleep(2000)means to wait for 2000milliseconds before performing the operation in the function.

Implementation process

Use Promise:

const sleep = (time) => {
    
    
    return new Promise(resolve => setTimeout(resolve, time));
}

verification

console.log(1);

sleep(2000).then(() => {
    
    
    console.log(2);
});

console.log(3);