Time out

[nishika]

The code the outside library showed.
What thin points could make the author time zero?

setTimeout(function () {
    //todo something
}, 0);

[kalena]

This may be necessary if the code is to be asynchronous.

For example

   console.log("1");
   console.log("2");
   console.log("3");

will, as expected: 1 2 3

However, when appended setTimeout It'll work. 1 3 2

console.log("1");
setTimeout(function() {
    console.log("2");
}, 0);
console.log("3"); // > 1 3 2

This is because the function is postponed until the next turn. event loop♪