javascript set delay

1var delayInMilliseconds = 1000; //1 second
2
3setTimeout(function() {
4  //your code to be executed after 1 second
5}, delayInMilliseconds);
6

1await new Promise(resolve => setTimeout(resolve, 1000));

1    async function delay(delayInms) {
2      return new Promise(resolve  => {
3        setTimeout(() => {
4          resolve(2);
5        }, delayInms);
6      });
7    }
8    async function sample() {
9      console.log('a');
10      console.log('waiting...')
11      let delayres = await delay(3000);
12      console.log('b');
13    }
14    sample();