Convert jquery to dom object

jQuery is an excellent JavaScript library for quickly writing interactive websites. However, in some cases you may need to convert jQuery objects into DOM objects so that you can transform and manipulate them using pure JavaScript.

In this article, we will discuss how to convert jQuery objects into DOM objects.

1. What is a jQuery object?

Before we begin, let’s quickly review jQuery objects. jQuery objects are objects created by the jQuery library that allow you to easily select and manipulate elements in an HTML document using CSS selectors.

When you use a CSS selector to select one or more elements, jQuery returns a jQuery object. You can use this object to call various methods such as .addClass(), .on(), etc. These methods allow you to make changes to elements, add event listeners, and perform other DOM operations.

2. The difference between jQuery objects and DOM objects

Now, let us take a look at the difference between jQuery objects and DOM objects. The DOM object is the document object model provided natively by the browser, which represents elements in an HTML document, XML document, or XHTML document. The DOM provides a programming interface that allows JavaScript and other programming languages ​​to access and modify the content and structure of a document.

In JavaScript, you can select DOM elements using methods such as document.getElementById() or document.querySelector(). These methods return a DOM object that you can manipulate using native JavaScript methods and properties.

The main difference between jQuery objects and DOM objects is that jQuery objects are a set of DOM objects nested in an array. These DOM objects can be manipulated using the methods and properties of jQuery objects. In contrast, DOM objects cannot use the methods and properties of jQuery objects.

3. Convert jQuery objects to DOM objects

Now that you understand the difference between jQuery objects and DOM objects, let’s discuss how to convert jQuery objects to DOM objects.

A jQuery object can be created by simply wrapping it in a jQuery constructor, as shown below:

var $element = $(‘#myElement’);

To convert a jQuery object into a DOM object, you can use one of the following methods .

1. Using [index]

You can use the [index] property of a jQuery object to access a single DOM element. For a jQuery object with only one element, you can use [0] or [1] (and so on) to access the first or second element. For jQuery objects with multiple elements, you can use [index] (where index is a zero-based number) to access a specific element.

// 获取第一个元素
var element = $element[0]; 

// 获取第二个元素
var element = $element[1]; 

// 获取特定元素
var element = $element[2];

Using this method, you can access basic DOM elements and manipulate them using native JavaScript.

2.Use .get(index)

jQuery also provides a method called get that allows you to access individual DOM elements within a jQuery object. When you call the .get(index) method, it returns the DOM element at the specified position. As with using the [index] attribute, you can specify a zero-based number to access a specific element.

// 获取第一个元素
var element = $element.get(0);

// 获取第二个元素
var element = $element.get(1);

// 获取特定元素
var element = $element.get(2);

This approach is very similar to using the [index] property, but it has the advantage that it will return when you request more than the number of elements in the jQuery object undefined (not null).

3.Use .toArray()

Finally, you can use the .toArray() method to convert a jQuery object into a DOM array. When you call .toArray() it returns an array of all DOM elements in the current jQuery object.

var elementsArray = $element.toArray();

Using this approach, you can now call native JavaScript methods and properties on DOM arrays.

4. Summary

In this article, we discussed the difference between jQuery objects and DOM objects, and introduced three methods to convert jQuery objects into DOM objects. These methods include using the [index] attribute, the .get(index) method, and the .toArray() method.

No matter which method you choose, converting jQuery objects into DOM objects is fairly simple and very useful. This allows you to easily manipulate DOM elements in pure JavaScript using native JavaScript methods and properties.

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