Is there focus event in jquery?
jquery has focus events. When an element gains focus, a focus event occurs; in jquery, you can use the focus() method to trigger the focus event, or specify an event processing function to be run when a focus event occurs, using the syntax "$(selector).focus(function)". When an element loses focus, a blur event occurs; jquery can use the blur() method to trigger a blur event, or specify an event handler to run when a blur event occurs.
The operating environment of this tutorial: windows7 system, jquery3.6.1 version, Dell G3 computer.
The focus is the area of concern, that is, the position where the cursor is currently activated. The small vertical line flashing in the page screen indicates that a certain control on the web page is selected and can be operated. Click the mouse to get the cursor, and the Tab key can switch focus according to the set Tabindex.
For example, if a text box gets the focus, the characters you type on the keyboard will directly enter the text box; or if a drop-down list box gets the focus, if you press the down arrow on the keyboard, it will A list will be made. The program also has events that occur when focus is gained (gotfocus()), events that occur when focus is lost (lostfocus()), and a method to set focus for the control (setfocus()). Making good use of focus can make your program appear very user-friendly.
jquery gets focus event
When an element gets focus, the focus event occurs.
When an element is selected by mouse click or positioned by tab key, the element will gain focus.
The focus() method triggers the focus event, or specifies a function to run when the focus event occurs.
Syntax
//触发 focus 事件 $(selector).focus() //将函数绑定到 focus 事件 $(selector).focus(function)
function: Optional. Specifies the function to be run when the focus event occurs.
Example: focus() method gets focus
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script ></script>
<script>
$(document).ready(function(){
$("input").focus(function(){
$("input").css("background-color","#FFFFCC");
});
});
</script>
</head>
<body>
输入你的名字: <input type="text">
</body>
</html>
jquery loses focus event
The blur event occurs when an element loses focus.
blur() method triggers the blur event, or specifies a function to run when the blur event occurs.
Tips: This method is often used together with the focus() method.
Grammar
//为被选元素触发 blur 事件： $(selector).blur() //添加函数到 blur 事件： $(selector).blur(function)
Example: blur() method loses focus
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script src="js/jquery-3.6.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("input").focus(function() {
$("input").css("background-color", "#FFFFCC");
});
$("input").blur(function() {
$("input").css("background-color", "#D6D6FF");
});
});
</script>
</head>
<body>
用户名: <input type="text" />
<p>请在上面的输入域中点击，使其获得焦点，然后在输入域外面点击，使其失去焦点。</p>
</body>
</html>
[Recommended learning:jQuery video tutorial、webfront-end video】
The above is the detailed content of Is there focus event in jquery?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Detailed explanation of jQuery reference methods: Quick start guide
Feb 27, 2024 pm 06:45 PM
Detailed explanation of jQuery reference method: Quick start guide jQuery is a popular JavaScript library that is widely used in website development. It simplifies JavaScript programming and provides developers with rich functions and features. This article will introduce jQuery's reference method in detail and provide specific code examples to help readers get started quickly. Introducing jQuery First, we need to introduce the jQuery library into the HTML file. It can be introduced through a CDN link or downloaded
How to use PUT request method in jQuery?
Feb 28, 2024 pm 03:12 PM
How to use PUT request method in jQuery? In jQuery, the method of sending a PUT request is similar to sending other types of requests, but you need to pay attention to some details and parameter settings. PUT requests are typically used to update resources, such as updating data in a database or updating files on the server. The following is a specific code example using the PUT request method in jQuery. First, make sure you include the jQuery library file, then you can send a PUT request via: $.ajax({u
How to remove the height attribute of an element with jQuery?
Feb 28, 2024 am 08:39 AM
How to remove the height attribute of an element with jQuery? In front-end development, we often encounter the need to manipulate the height attributes of elements. Sometimes, we may need to dynamically change the height of an element, and sometimes we need to remove the height attribute of an element. This article will introduce how to use jQuery to remove the height attribute of an element and provide specific code examples. Before using jQuery to operate the height attribute, we first need to understand the height attribute in CSS. The height attribute is used to set the height of an element
jQuery Tips: Quickly modify the text of all a tags on the page
Feb 28, 2024 pm 09:06 PM
Title: jQuery Tips: Quickly modify the text of all a tags on the page In web development, we often need to modify and operate elements on the page. When using jQuery, sometimes you need to modify the text content of all a tags in the page at once, which can save time and energy. The following will introduce how to use jQuery to quickly modify the text of all a tags on the page, and give specific code examples. First, we need to introduce the jQuery library file and ensure that the following code is introduced into the page: <
Use jQuery to modify the text content of all a tags
Feb 28, 2024 pm 05:42 PM
Title: Use jQuery to modify the text content of all a tags. jQuery is a popular JavaScript library that is widely used to handle DOM operations. In web development, we often encounter the need to modify the text content of the link tag (a tag) on the page. This article will explain how to use jQuery to achieve this goal, and provide specific code examples. First, we need to introduce the jQuery library into the page. Add the following code in the HTML file:
Understand the role and application scenarios of eq in jQuery
Feb 28, 2024 pm 01:15 PM
jQuery is a popular JavaScript library that is widely used to handle DOM manipulation and event handling in web pages. In jQuery, the eq() method is used to select elements at a specified index position. The specific usage and application scenarios are as follows. In jQuery, the eq() method selects the element at a specified index position. Index positions start counting from 0, i.e. the index of the first element is 0, the index of the second element is 1, and so on. The syntax of the eq() method is as follows: $("s
How to tell if a jQuery element has a specific attribute?
Feb 29, 2024 am 09:03 AM
How to tell if a jQuery element has a specific attribute? When using jQuery to operate DOM elements, you often encounter situations where you need to determine whether an element has a specific attribute. In this case, we can easily implement this function with the help of the methods provided by jQuery. The following will introduce two commonly used methods to determine whether a jQuery element has specific attributes, and attach specific code examples. Method 1: Use the attr() method and typeof operator // to determine whether the element has a specific attribute
Introduction to how to add new rows to a table using jQuery
Feb 29, 2024 am 08:12 AM
jQuery is a popular JavaScript library widely used in web development. During web development, it is often necessary to dynamically add new rows to tables through JavaScript. This article will introduce how to use jQuery to add new rows to a table, and provide specific code examples. First, we need to introduce the jQuery library into the HTML page. The jQuery library can be introduced in the tag through the following code:
