loop1: for (let i = 0; i < 4; i++) {
  loop2: for (let j = 0; j < 3; j++) {
    console.log('before')
    if (i === 1) {
      // when i equal to 1, jump out the loop2 immediately
      continue loop1
      // or can do break loop1
    }
    console.log(`i=${i}, j=${j}`)
  }
}

foo: {
  console.log('face');
  break foo;
  console.log('this will not be executed');
}
console.log('swap');

// this will log:

// "face"
// "swap"