A brief discussion on bind(), live(), delegate(), on() event binding methods in Jquery

Preface

Because projects often use jquery to add and delete dom elements, it involves the binding event method of dom elements. Let’s briefly summarize the differences between bind, live, delegate, and on. , for future reference, and I hope this article can help gardeners in the future. If there is anything inappropriate in the article, I hope you will correct me. Without further ado, let’s get straight to the point.

bind()

Brief description

##　bind()#Add one or moreevent handlersto the matching element.

##How to use

$(selector).bind(event,data,function)

Event：Required; one or more events added to the element, such as click, dblclick, etc.;

Single event processing: For example,$(selector).bind("click",data,function);

Multi-event processing: 1. Use spaces to separate multiple events, such as$(selector).bind("click dbclick mouseout",data,function);

## 　　　　　　　 　　 　　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　duct in in , event2:function, ...})##　## 3. Space separation method: Binding is relatively rigid and cannot bind separate functions to events. It is suitable for processing multiple events. Calling the same function;

data：Optional; parameters that need to be passed;

# 　function：Required; when bound Function that needs to be executed when a certain event occurs;

##for example

##

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#Applicable Jquery version

#　Applicable to all versions, but according to the official website, since jquery1.7 version, the bind() functionIt is recommended to use on() instead.
live()

Brief description

Tothe current or future matching elementAdd one or more event handlers;

Usage

　$(selector).live(event,data,function)

Required; one or more items added to the element single event, such as click, dblclick, etc.;Single event processing: for example

$(selector).live ("click",data,function);# Multi-event processing: 1. Use spaces to separate multiple events Events, such as

$(selector).live("click dbclick mouseout",data,function);

$(selector).live({event1:function, event2:function, ...})　## 3. There is a way to separate the space: binding is more rigid, cannot bind functions alone, suitable for processing multiple events call the same function;

　　　　 　　　 Braces alternative: Binding is more flexible and you can bind functions to events separately;# Data:

　　function：必需；当绑定事件发生时，需要执行的函数；

举例说明

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View Code

适用Jquery版本

　　jquery1.9版本以下支持，jquery1.9及其以上版本删除了此方法，jquery1.9以上版本用on()方法来代替。

delegate()

简要描述

delegate()为指定的元素（被选元素的子元素）添加一个或多个事件处理程序，并规定当这些事件发生时运行的函数。使用 delegate() 方法的事件处理程序适用于当前或未来的元素（比如由脚本创建的新元素）。

使用方式　

　　$(selector).delegate(childSelector,event,data,function)

childSelector:必需项；需要添加事件处理程序的元素，一般为selector的子元素；

event：必需项；添加到元素的一个或多个事件，例如 click,dblclick等；

　　　　　　单事件处理：例如$(selector).delegate(childselector,"click",data,function);

　　　　　　多事件处理：1.利用空格分隔多事件，例如$(selector).delegate(childselector,"clickdbclick mouseout",data,function);

　　　　　　　　　　　　2.利用大括号灵活定义多事件，例如$(selector).delegate(childselector,{event1:function, event2:function, ...})　

　　　　　　　　　　　　3.空格相隔方式：绑定较为死板，不能给事件单独绑定函数,适合处理多个事件调用同一函数情况；

　　　　　　　　　　　　 大括号替代方式：绑定较为灵活，可以给事件单独绑定函数；　　　

　　data：可选；需要传递的参数；

　　function：必需；当绑定事件发生时，需要执行的函数；

举例说明

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View Code

适用Jquery版本

jque#ry1.4.2# and above;on()Brief description

on()

For the specified element, add One or more event handlers and specifies functions to run when these events occur. Event handlers using the on() method work on current or future elements (such as new elements created by a script).Usage

##　$(selector ).on(event,childselector,data,function)

##　event：

Required; one or more events added to the element, such as click, dblclick, etc.;##　　　 Single event processing: for example$(selector).on("click",childselector,data,function);

Multi-event processing: 1. Use spaces to separate multiple events, such as

$(selector).on("click##dbclick mouseout",childseletor,data,function);#

　　　　　　　　　　　　2.利用大括号灵活定义多事件，例如$(selector).on({event1:function, event2:function, ...},childselector);　

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