How jQuery Works | jQuery Learning Center
Sat May 29 2021 00:24:06 GMT+0000 (Coordinated Universal Time)
Saved by @ejiwen
run code as soon as the document is ready to be manipulated.The jQuery library exposes its methods and properties via two properties of the window object called jQuery and $.
https://learn.jquery.com/about-jquery/how-jquery-works/
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