jquery object creation method

In jQuery, we can create objects in many ways. This article will introduce some of the most common methods.

1. $(selector)

The most common way to create a jQuery object is through a selector. For example:

$(document)
$("#myDiv")
$("ul li")

These selectors will return the matched elements and then convert them into jQuery objects.

2. $(html)

We can also use html strings to create a jQuery object. For example:

$("<div>hello world</div>")
$("<ul><li>1</li><li>2</li><li>3</li></ul>")

This will create a jQuery object containing the given HTML element.

3. $(element)

We can directly pass the DOM element to the jQuery function to create a jQuery object. For example:

var domElement = document.getElementById("myDiv");
var jqElement = $(domElement);

This will return a jQuery object containing the specified DOM element.

4. $(callback)

If we need to execute some code when the document ready event is triggered, we can pass a callback function to the jQuery function:

$(function() {
  // some code to be executed on document ready
});

This will execute the given code after the page has fully loaded.

5. $(window)

We can also create a jQuery object to represent the browser window:

$(window)

This object can be used to register some Browser window related event handlers.

6. $(document)

Finally there is a common method, which is to create a jQuery object to represent the entire document:

$(document)

This object is usually Used to register event handlers or access other elements in the document.

Summary

In jQuery, we can use a variety of methods to create objects. Construct jQuery objects from selectors, HTML strings, DOM elements, callback functions, browser windows, and entire documents. These methods allow us to operate page elements and handle events more conveniently.

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