What are the methods in jquery

jQuery is a very popular JavaScript library and is widely used in front-end development. In order to better understand and use jQuery, we need to understand its methods.

1. Selector

One of the most important features of jQuery is the selector. It can obtain HTML, CSS, DOM elements, etc. through different methods and parameters, making it easy to operate and process. The following are some common selector methods:

• $(‘#id’): Selects the element with the specified id.
• $(‘.class’): Select elements of the specified class.
• $(‘element’): Select the element with the specified tag name.
• $(‘:checked’): Select the selected element.
• $(‘:visible’): Select visible elements.
• $(‘:hidden’): Select hidden elements.

2. Events

jQuery also provides a large number of event methods, commonly used ones include click, mouseover, mouseout, keydown, etc. Here are some common event methods:

• click(): element click event.
• hover(): Move in and move out events.
• keydown(): Keyboard press event.
• mouseenter(): mouse enters element event.
• mouseleave(): mouse leaves element event.

3. Operation

jQuery can conveniently operate HTML, CSS and DOM elements. The following are some common operation methods:

• html() : Get or set the HTML content of the element.
• text(): Gets or sets the text content of the element.
• attr(): Get or set the attribute value of the element.
• css(): Get or set the CSS attribute value of the element.
• addClass(): Add a class to the element.
• removeClass(): Remove class from the element.

4. Effects

jQuery also provides some effect methods, such as fadeIn, fadeOut, slideUp, slideDown, etc., to make the page richer and more interesting. The following are some common effect methods:

• fadeIn(): Fade in effect.
• fadeOut(): Fade out effect.
• slideUp(): Slide up effect.
• slideDown(): Slide down effect.
• animate(): animation effect.

5.ajax

jQuery’s AJAX function is also very powerful and can be used to load data and update page content asynchronously. The following are some common ajax methods:

• $.ajax(): Initiate an asynchronous request.
• $.get(): Send a GET request.
• $.post(): Send a POST request.
• $.getJSON(): Get JSON data.

6. Tool methods

jQuery also provides some practical tool methods, such as $.each, $.trim, etc. The following are some common tool methods:

• $.each(): Traverse the array or object.
• $.extend(): Extend object.
• $.trim(): Remove spaces at both ends of the string.
• $.inArray(): Array search element.

Summary

The above are some common methods in jQuery. Of course, jQuery has many other methods and functions, which need to be slowly understood and mastered in actual use. Mastering the jQuery method can greatly improve the efficiency and quality of front-end development, and also allows us to develop websites and applications that meet user needs faster.

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