search
HomeWeb Front-endJS TutorialDetailed explanation of usage examples of jQuery.holdReady(hold)

Detailed explanation of usage examples of jQuery.holdReady(hold)

Jun 16, 2017 pm 03:20 PM
InstructionsExampleDetailed explanation

Pause or resume the execution of the .ready() event.

The $.holdReady() method allows the caller to delay jQuery's ready event. This advanced functionality is typically done using a dynamic script loader, which loads JavaScript such as a jQuery plug-in, and allows additional ready events to occur even when the DOM may be ready. This method must be called early in the file, immediately after the

jQuery script like this. Calling this method after the ready event will have no effect even if it has been emitted.

To delay the ready event, call $.holdReady(true) for the first time. When the ready event should be executed, $.holdReady(false) is called. Please note that multiple holds can be placed on the ready event, each calling $.holdReady(true) one by one. The ready event will not execute until all corresponding $.holdReady(false) has been posted and the normal file ready conditions are met.

jQuery.holdReady(hold) Return value type boolean

The jquery.holdReady() method allows jQuery's completion event to be locked by this function.
A typical application scenario for this advanced feature is dynamic loading of scripts, such as jQuery plug-ins, etc.
Before the attached script is loaded, the jQuery completion event will not be triggered even if the page is ready.
This function must be called in the front part of the page, such as in the tag, jQuery loads the next line.
Calling this function after the completion event is triggered has no effect.
Usage: First call .holdReady(true) [the completion event will be locked after the call]. When ready to fire the completion event, call .holdReady(false). It should be noted that
You can add multiple locks to the completion event, and each lock corresponds to a $.holdReady(false)[unlock] call.
jQuery's completion event will be triggered when all locks are released and the page is ready.
In fact, it is a security lock for some codes that need to rely on dynamic scripts.
The ready event will be executed after the required dynamic scripts are loaded, rather than after the DOM tree is successfully constructed.

Example code:

Example 1:

<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="" />
<title>php.cn</title>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
jQuery.holdReady(true);
$(document).ready(function(){
  alert("我不会被弹出");
})
</script>
</head>
<body>
  
</body>
</html>

In the above code, due to the addition of jQuery.holdReady(true), even though the document is loaded, it will not be executed. function in ready().

Example 2:

<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="" />
<title>php.cn</title>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
</head>
<body>
<button id="first">点击测试弹出</button>
<button id="second">解除延迟</button>
<script type="text/javascript">
jQuery.holdReady(true) 
$(document).ready(function(){
  $("#first").click(function(){
    alert("我不会被弹出");
  })
})
$("#second").click(function(){
  jQuery.holdReady(false);
})
</script>
</body>
</html>

When you click to release the delay, it will pop up.

Let’s look at a small example again

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript" src="../js/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="index.js"></script>
<title>Insert title here</title></head>
<body>
<input type="button" id="btn" value="呵呵">
</body>
</html>

Then there are two js files

The first thing to load is index.js

$.holdReady(true);//将holdReady改为ture,点击按钮就没有任何效果,改为false就可以是用来里面的js事件$(function(){
    $(&#39;#btn&#39;).click(function(){
        alert(123);
    });

});

Write two js below The files index.js and hold.js

Only load index.js in jsp, decide whether to load hold.js in index.js
The code is as follows:

//hold.js$(function(){
    alert(&#39;这是使用holdReady加载出来的&#39;);
}); 

//index.jsjQuery.holdReady(true)
$.getScript("hold.js", function() {
    jQuery.holdReady(false);
});

Load hold.js When calling a callback function, change true to false, so that the hold.js file can be loaded

The above is the detailed content of Detailed explanation of usage examples of jQuery.holdReady(hold). For more information, please follow other related articles on the PHP Chinese website!

Statement
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
The Future of Python and JavaScript: Trends and PredictionsThe Future of Python and JavaScript: Trends and PredictionsApr 27, 2025 am 12:21 AM

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Python vs. JavaScript: Development Environments and ToolsPython vs. JavaScript: Development Environments and ToolsApr 26, 2025 am 12:09 AM

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Is JavaScript Written in C? Examining the EvidenceIs JavaScript Written in C? Examining the EvidenceApr 25, 2025 am 12:15 AM

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript's Role: Making the Web Interactive and DynamicJavaScript's Role: Making the Web Interactive and DynamicApr 24, 2025 am 12:12 AM

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C   and JavaScript: The Connection ExplainedC and JavaScript: The Connection ExplainedApr 23, 2025 am 12:07 AM

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

From Websites to Apps: The Diverse Applications of JavaScriptFrom Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AM

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python vs. JavaScript: Use Cases and Applications ComparedPython vs. JavaScript: Use Cases and Applications ComparedApr 21, 2025 am 12:01 AM

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

The Role of C/C   in JavaScript Interpreters and CompilersThe Role of C/C in JavaScript Interpreters and CompilersApr 20, 2025 am 12:01 AM

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

See all articles

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

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.