javascript - Why do we use the dollar window and document method for binding? -

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this question has answer here:

why use this?

(function( $, window, document, undefined ) { ....... })(( jquery, window, document );)

i think $ converted jquery, ok! why window, document?

and also, can use own selector method this?

var mydiv = $('#mydiv');     (function( $, window, document, mydiv, undefined ) {     .......     })(( jquery, window, document, mydiv );)

to make locally scoped reference window , document. provides performance benefit.


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