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I used a Number Object Method in JS which is isInteger(num). This function returns "true" if num is an Integer and vice versa. I want to understand how this function works but can't figure it out. So, I want to ask:

  1. What is the implementation of isInteger() function in JS? (the logic)

  2. Is there any reference website to see the implementation of other build-in methods in JS?

Andy
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Hoang Minh
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    Implementations are hardly interesting, [the standard](https://tc39.es/ecma262/multipage/numbers-and-dates.html#sec-number.isinteger) might be ..? – Teemu Sep 19 '22 at 10:46
  • `isInteger` might not be implemented in JS. – Bergi Sep 19 '22 at 11:04

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