Why does alert(); run before console.log();

Question

How My Question is Different From Others

I am using ES6 syntax. The other questions I looked at uses ES5 syntax.

The Question

Answer 1

Check test below, which will return from function on 999 cycle of for loop before window.alert function fires. In my case I did not see window.alert. This is because actually alert runs after loop of console.log's functions.

// Test function
const test = (br) => {
  for (let i = 0; i < 1000; i++) {
    console.log(i);
    // If br true and cycle #999 - return before
    // loop end and window.alert exec
    if(br && i === 999) return;
  }
  window.alert('Hello World!');
};

// Test
test(true);