免费获取jQuery Succinctly电子书：个人与教育用途授权

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《jQuery Succinctly》是一本由Cody Lindley撰写并由Daniel Jebaraj作序的关于jQuery的电子书籍。该书版权属于Syncfusion Inc.，于2012年发布，旨在提供免费下载，但需在完成注册后获取。此版本的内容仅限于个人和教育用途，未经官方许可不得任何形式的复制或再分发，以确保知识产权的尊重。 jQuery Succinctly聚焦于jQuery库，这是一个流行的JavaScript库，它简化了HTML文档遍历、事件处理、动画和Ajax交互等前端开发任务。书中内容涵盖了jQuery的基础知识，包括选择器语法、DOM操作、事件处理函数、动画效果以及与服务器通信的方法。作者强调了使用jQuery进行高效Web开发的实用技巧和最佳实践，适合初学者快速入门，也对有一定经验的开发者提供巩固和提升的参考。书中提到的重要信息包括： 1. 注册和获取免费电子书：访问syncfusion.com完成注册，这是获取正版书籍的唯一途径。 2. 权利声明：所有内容受版权保护，未经允许的使用将构成侵权。作者和版权所有者不承担因本书提供的信息导致的任何责任或损失。 3. 使用限制：用户在同意书中列出的条款下阅读，如果这些条件不符合读者需求，建议不要使用这本书。 4. 编辑团队：该出版物由Syncfusion ASP.NET MVC团队编辑，他们是为企业级应用程序提供先进框架的专业团队，书中可能包含针对ASP.NET MVC框架集成jQuery的指导。通过阅读《jQuery Succinctly》，读者不仅可以掌握jQuery的核心功能，还能了解到如何将其与其他技术（如ASP.NET MVC）相结合，提高开发效率和用户体验。这是一本值得珍藏的资源，对于提升前端开发技能具有重要意义。

The concept, behind the concept, behind jQuery

While selecting something and doing something is the core concept behind jQuery, I would like

to extend this concept to include creating something as well. Therefore, the concept behind

jQuery could be extended to include first creating something new, selecting it, and then doing

something with it. We could call this the concept, behind the concept, behind jQuery.

What I am trying to make obvious is that you are not stuck with only selecting something that is

already in the DOM. It is additionally important to grok that jQuery can be used to create new

DOM elements and then do something with these elements.

In the code example below, we create a new <a> element that is not in the DOM. Once

created, it is selected and then manipulated.

Sample: sample2.html

<!DOCTYPE html>

<body>

></script>

jQuery('<a>jQuery</a>').attr('href', 'http://www.jquery.com').appendTo('b

ody');

</script>

</body>

</html>

The key concept to pick up here is that we are creating the <a> element on the fly and then

operating on it as if it was already in the DOM.

jQuery requires HTML to run in standards mode or almost-standards

mode

There are known issues with jQuery methods not working correctly when a browser renders an

HTML page in quirks mode. Make sure when you are using jQuery that the browser interprets

the HTML in standards mode or almost standards mode by using a valid doctype.

To ensure proper functionality, code examples in this book use the HTML 5 doctype.

<!DOCTYPE html>

Google hosts several versions of the jQuery source code with the intent of it being used by

anyone. This is actually very handy. In the code example below I am using a <script> element

to include a minified version of jQuery that is hosted by Google.

Google also hosts several previous versions of the jQuery source code, and for each version,

minified and non-minified variants are provided. I recommend using the non-minified variant

during development, as debugging errors is always easier when you are dealing with non-

minified code.

A benefit of using a Google hosted version of jQuery is that it is reliable, fast, and potentially

cached.

Executing jQuery code when DOM is parsed without using ready()

The custom ready() event is not entirely needed. If your JavaScript code does not affect the

DOM, you can include it anywhere in the HTML document. This means you can avoid the

ready() event altogether if your JavaScript code is not dependent on the DOM being intact.

Most JavaScript nowadays, especially jQuery code, will involve manipulating the DOM. This

means the DOM has to be fully parsed by the browser in order for you to operate on it. This fact

is why developers have been stuck on the window.onload roller coaster ride for a couple of

years now.

To avoid using the ready() event for code that operates on the DOM, you can simply place

your code in an HTML document before the closing </body> element. Doing so ensures the

DOM is completely loaded, simply because the browser will parse the document from top to

bottom. If you place your JavaScript code in the document after the DOM elements it

manipulates, there is no need to use the ready() event.

In the example below, I have forgone the use of ready() by simply placing my script before the

document body closes. This is the technique I use throughout this book and on the majority of

sites I build.

Sample: sample5.html

<!DOCTYPE html>

<body>

<p>

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