Why does $() works in Google?

Question

I have not included jQuery file on my HTML page, but still $() works in google chrome console and it is acting as a selector, why? However, functions of jQuery are not working, but I want to know that why $() is working on google chrome console?

Answer 1

Chrome devtools define set of useful shortcuts to query DOM. Those include $ and $$. From the docs:

$(selector) returns the reference to the first DOM element with the specified CSS selector. This function is an alias for the document.querySelector() function.

Similarly, $$(selector) is the alias to document.querySelectorAll(selector) method.

So it has nothing to do with jQuery and they will only work in developer console.