Basic JQuery and basic jquery tutorials

Basic JQuery and basic jquery tutorials
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Convert a DOM object to a jQuery object

For a DOM object, you only need to wrap the DOM object with $ () to obtain a jQuery object. That is, $ (DOM object)

Convert a jQuery object to a DOM object

Two conversion methods are used to convert a jQuery object to a DOM object: [index] And. get (index );
(1) The jQuery object is an array object. You can use the [index] method to obtain the corresponding DOM object.
(2) jQuery provides the. get (index) method to obtain the corresponding DOM object.

JQuery basic Selector

$ {"# Id"} is equivalent to document. getElementById ("id ");
$ {"TagName"} is equivalent to document. getElementsByTagName ("tagName ");
Selector1, selector2, selectorN usage: $ ("div, span, p. myClass") return value set Element