Table of Contents
Definition and usage
Syntax
定义和用法
语法
Home Web Front-end JS Tutorial jQuery events: comparison between bind method and blur() method

jQuery events: comparison between bind method and blur() method

Jun 26, 2017 pm 02:10 PM
bind blur jquery event method

1.bind method

Definition and usage

bind() method adds one or more to the selected elements Event handling procedures, and functions that run when an event occurs.

Since jq version 1.7, the on() method is the preferred method to add event handlers to the selected element


Syntax

$(selector).bind(event,data,function,map)
Copy after login
Required. Specifies one or more events to be added to the element. Optional. Specifies additional data to be passed to the function. Required. Specifies a function to run when an event occurs. Specifies event mapping (

例1、给

标签添加一个单击事件

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>给<p>标签添加一个单击事件</title>
<script src=" 
</script>
<script>
$(document).ready(function(){
  $("p").bind("click",function(){
    alert("这个段落被点击了。");
  });
});
</script></head><body><p>点我!</p></body></html>
Copy after login


例2、向元素添加多个事件。(添加多个事件)

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>
向元素添加多个事件
</title>
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("p").bind("mouseover mouseout",function(){
    $("p").toggleClass("intro");
  });
});
</script>
<style type="text/css">
.intro
{
font-size:150%;
color:red;
}
</style>
</head>
<body>
<p>将鼠标移动到该段落上。</p>
</body>
</html>
Copy after login

注意:toggleClass() 方法对添加和移除被选元素的一个或多个类进行切换。如果不存在指定的类则添加类,如果已设置则删除之。

例3、使用事件映射来向被选元素添加一些事件/函数(使用事件映射)

<!DOCTYPE
 html>
<html>
<head>
<meta charset="utf-8"> 
<title>
使用事件映射来向被选元素添加一些事件/函数
</title>
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").bind({
    click:function(){$("p").slideToggle();},
    mouseover:function(){$("body").css("background-color","#E9E9E4");},  
    mouseout:function(){$("body").css("background-color","#FFFFFF");}  
  });
});
</script>
</head>
<body>
<p>这是一个段落。</p>
<button>点我!</button>
</body>
</html>
Copy after login


例4、向一个自定义命名的事件处理程序传递数据。(向函数传递数据)

<!DOCTYPE
 html>
<html>
<head>
<meta charset="utf-8"> 
<title>
向一个自定义命名的事件处理程序传递数据
</title>
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
function handlerName(e) 
{
alert(e.data.msg);
}
$(document).ready(function(){
$("p").bind("click", {msg: "你刚点击了!"}, handlerName)
});
</script>
</head>
<body>
<p>点我!</p>
</body>
</html>
Copy after login

2、blur()方法

定义和用法

当元素失去焦点时发生 blur 事件。

blur() 方法触发 blur 事件,或规定当发生 blur 事件时运行的函数。

提示:该方法常与 focus() 方法一起使用。


语法

为被选元素触发 blur 事件:

$(selector).blur()
Copy after login

添加函数到 blur 事件:

$(selector).blur(function)
Copy after login
ParametersDescription
##event
Separate multiple event values ​​by spaces. Must be a valid event.
data
function
map{event:function, event:function, ...}), Contains one or more events to be added to the element, and a function to run when the event occurs.
参数描述
function可选。规定当 blur 事件发生时运行的函数。


例1、添加函数到blur事件,当input字段失去焦点时发生blur事件

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>
添加函数到blur事件
</title>
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("input").blur(function(){
    alert("输入框失去了焦点");
  });
});
</script>
</head>
<body>
Copy after login

在输入框写些东西,然后点击输入框外,让其失去焦点。




例2、填写表单时需要实现如下效果

<!DOCTYPE html PUBLIC "-//W3C//DTDHTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type"content="text/html; charset=UTF-8">
<title>鼠标点击后无文字,挪开鼠标后有文字</title>
<script language="JavaScript"src="../jQuery/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
     $(function(){
         /*进入焦点时触发*/
         $("#account").focus(function(){
              varoldValue = $(this).val();
              if(oldValue == this.defaultValue){
                  $(this).val("");
              }
         });  
         /*失去焦点时触发*/
         $("#account").blur(function(){
              alert("12");
              varoldValue = $(this).val();
              if(oldValue == ""){
                   $(this).val(this.defaultValue);
              }
         });
     });
</script>
</head>
<body>
帐号:<input id="account"name="account" type="text" value="请输入帐号">
</body>
</html>
Copy after login


The above is the detailed content of jQuery events: comparison between bind method and blur() method. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to delete WeChat friends? How to delete WeChat friends How to delete WeChat friends? How to delete WeChat friends Mar 04, 2024 am 11:10 AM

WeChat is one of the mainstream chat tools. We can meet new friends, contact old friends and maintain the friendship between friends through WeChat. Just as there is no such thing as a banquet that never ends, disagreements will inevitably occur when people get along with each other. When a person extremely affects your mood, or you find that your views are inconsistent when you get along, and you can no longer communicate, then we may need to delete WeChat friends. How to delete WeChat friends? The first step to delete WeChat friends: tap [Address Book] on the main WeChat interface; the second step: click on the friend you want to delete and enter [Details]; the third step: click [...] in the upper right corner; Step 4: Click [Delete] below; Step 5: After understanding the page prompts, click [Delete Contact]; Warm

How to write a novel in the Tomato Free Novel app. Share the tutorial on how to write a novel in Tomato Novel. How to write a novel in the Tomato Free Novel app. Share the tutorial on how to write a novel in Tomato Novel. Mar 28, 2024 pm 12:50 PM

Tomato Novel is a very popular novel reading software. We often have new novels and comics to read in Tomato Novel. Every novel and comic is very interesting. Many friends also want to write novels. Earn pocket money and edit the content of the novel you want to write into text. So how do we write the novel in it? My friends don’t know, so let’s go to this site together. Let’s take some time to look at an introduction to how to write a novel. Share the Tomato novel tutorial on how to write a novel. 1. First open the Tomato free novel app on your mobile phone and click on Personal Center - Writer Center. 2. Jump to the Tomato Writer Assistant page - click on Create a new book at the end of the novel.

How to enter bios on Colorful motherboard? Teach you two methods How to enter bios on Colorful motherboard? Teach you two methods Mar 13, 2024 pm 06:01 PM

Colorful motherboards enjoy high popularity and market share in the Chinese domestic market, but some users of Colorful motherboards still don’t know how to enter the bios for settings? In response to this situation, the editor has specially brought you two methods to enter the colorful motherboard bios. Come and try it! Method 1: Use the U disk startup shortcut key to directly enter the U disk installation system. The shortcut key for the Colorful motherboard to start the U disk with one click is ESC or F11. First, use Black Shark Installation Master to create a Black Shark U disk boot disk, and then turn on the computer. When you see the startup screen, continuously press the ESC or F11 key on the keyboard to enter a window for sequential selection of startup items. Move the cursor to the place where "USB" is displayed, and then

How to recover deleted contacts on WeChat (simple tutorial tells you how to recover deleted contacts) How to recover deleted contacts on WeChat (simple tutorial tells you how to recover deleted contacts) May 01, 2024 pm 12:01 PM

Unfortunately, people often delete certain contacts accidentally for some reasons. WeChat is a widely used social software. To help users solve this problem, this article will introduce how to retrieve deleted contacts in a simple way. 1. Understand the WeChat contact deletion mechanism. This provides us with the possibility to retrieve deleted contacts. The contact deletion mechanism in WeChat removes them from the address book, but does not delete them completely. 2. Use WeChat’s built-in “Contact Book Recovery” function. WeChat provides “Contact Book Recovery” to save time and energy. Users can quickly retrieve previously deleted contacts through this function. 3. Enter the WeChat settings page and click the lower right corner, open the WeChat application "Me" and click the settings icon in the upper right corner to enter the settings page.

How to set font size on mobile phone (easily adjust font size on mobile phone) How to set font size on mobile phone (easily adjust font size on mobile phone) May 07, 2024 pm 03:34 PM

Setting font size has become an important personalization requirement as mobile phones become an important tool in people's daily lives. In order to meet the needs of different users, this article will introduce how to improve the mobile phone use experience and adjust the font size of the mobile phone through simple operations. Why do you need to adjust the font size of your mobile phone - Adjusting the font size can make the text clearer and easier to read - Suitable for the reading needs of users of different ages - Convenient for users with poor vision to use the font size setting function of the mobile phone system - How to enter the system settings interface - In Find and enter the "Display" option in the settings interface - find the "Font Size" option and adjust it. Adjust the font size with a third-party application - download and install an application that supports font size adjustment - open the application and enter the relevant settings interface - according to the individual

Summary of methods to obtain administrator rights in Win11 Summary of methods to obtain administrator rights in Win11 Mar 09, 2024 am 08:45 AM

A summary of how to obtain Win11 administrator rights. In the Windows 11 operating system, administrator rights are one of the very important permissions that allow users to perform various operations on the system. Sometimes, we may need to obtain administrator rights to complete some operations, such as installing software, modifying system settings, etc. The following summarizes some methods for obtaining Win11 administrator rights, I hope it can help you. 1. Use shortcut keys. In Windows 11 system, you can quickly open the command prompt through shortcut keys.

The secret of hatching mobile dragon eggs is revealed (step by step to teach you how to successfully hatch mobile dragon eggs) The secret of hatching mobile dragon eggs is revealed (step by step to teach you how to successfully hatch mobile dragon eggs) May 04, 2024 pm 06:01 PM

Mobile games have become an integral part of people's lives with the development of technology. It has attracted the attention of many players with its cute dragon egg image and interesting hatching process, and one of the games that has attracted much attention is the mobile version of Dragon Egg. To help players better cultivate and grow their own dragons in the game, this article will introduce to you how to hatch dragon eggs in the mobile version. 1. Choose the appropriate type of dragon egg. Players need to carefully choose the type of dragon egg that they like and suit themselves, based on the different types of dragon egg attributes and abilities provided in the game. 2. Upgrade the level of the incubation machine. Players need to improve the level of the incubation machine by completing tasks and collecting props. The level of the incubation machine determines the hatching speed and hatching success rate. 3. Collect the resources required for hatching. Players need to be in the game

Detailed explanation of Oracle version query method Detailed explanation of Oracle version query method Mar 07, 2024 pm 09:21 PM

Detailed explanation of Oracle version query method Oracle is one of the most popular relational database management systems in the world. It provides rich functions and powerful performance and is widely used in enterprises. In the process of database management and development, it is very important to understand the version of the Oracle database. This article will introduce in detail how to query the version information of the Oracle database and give specific code examples. Query the database version of the SQL statement in the Oracle database by executing a simple SQL statement

See all articles