The question I'm talking about is this one:
It has the most up-votes and people seem to understand it. Someone has put in an edit which adds the following text to it:
The statement `document.getElementById("given-id")` returns `null` if an element with `given-id` doesn't exist, and `null` is falsy meaning that it translates to false when evaluated in an if-statement. ([other falsy values]) : https://developer.mozilla.org/en-US/docs/Glossary/Falsy
Should I reject this? Should the user have written a new answer instead of editing an existing one?