unknown Javascript syntax meaning

Question

I'm not sure about the meaning of this expression :

var Ajax = Ajax || {};

I think its create a new object if not exists, but I 'm not sure

Possible duplicate of [Javascript Question Mark & Double Pipes](https://stackoverflow.com/questions/26636653/javascript-question-mark-double-pipes) — Baris Demiray, Jun 08 '18 at 09:37
Possible duplicate of [JavaScript OR (||) variable assignment explanation](https://stackoverflow.com/questions/2100758/javascript-or-variable-assignment-explanation) — rick, Jun 08 '18 at 09:37
You are correct, it creates a new Ajax object if it does not yet exist. — Lain, Jun 08 '18 at 09:37

score 0 · Accepted Answer · edited Jun 08 '18 at 11:25

0

It assigns {} to Ajax if Ajax doesn't yet exist, else it Ajax keeps its value.

edited Jun 08 '18 at 11:25

Ivan

answered Jun 08 '18 at 10:09

theCoder

1 Answers1