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Getting started with JQuery—a detailed introduction to the coding style of the JQuery program_jquery
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JS Tutorial
Getting started with JQuery—a detailed introduction to the coding style of the JQuery program_jquery
Getting started with JQuery—a detailed introduction to the coding style of the JQuery program_jquery
Getting started with jquery
coding style
"JQuery Authoritative Guide" Chapter 1 Getting Started with jQuery Development. This chapter starts with the basic concepts of jQuery in a step-by-step manner, introduces the download of the jQuery library, and introduces simple application methods; the latter part focuses on jQuery controlling DOM objects. And the introduction of page CSS styles, through some simple examples, allows readers to have a general understanding of the functional application of jQuery in the page, laying the foundation for further learning the detailed objects and methods of the jQuery library in the next chapter. This section introduces you to the coding style of the jQuery program.
1.1.5 Code style of jQuery program
1. The use of the “$” dollar sign
In the jQuery program, the most used one is the “$” dollar sign. This symbol must be used whether it is the selection of page elements or the prefix of functional functions. It can be said that It is the hallmark of the jQuery program.
2. Linked writing of event operations
When writing events for a certain element on the page, the jQuery program can write all events of the element in a linked way. To better illustrate the use of this writing method, we illustrate it through an example.
Example 1-2 Chain writing of jQuery events
(1) Function description
In the page, there is a
tag, in which The tag contains two
tags, one for the theme and the other for the content. When the page is first loaded, the included content
tag is invisible. When the user clicks the theme
tag When , change its background color and display the content
tag.
(2) Implementation code
Create a new HTML file 1-2.html and add the code shown in code listing 1-2.
Code List 1-2 Chain writing of jQuery events
Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional. dtd">
Chain writing of jQuery events< ;/title> <br><script language="javascript" type="text/javascript" <BR>src="Jscript/jquery-1.4.2.min.js"></script> <br> <style type="text/css"> <br>.divFrame{width:260px;border:solid 1px #666; <br>font-size:10pt} <br>.divTitle{background-color:#eee ;padding:5px} <br>.divContent{padding:5px;display:none} <br>.divCurrColor{ background-color:Red} <br></style> <br><script type="text/ javascript"> <br>$(function(){ <br>$(".divTitle").click(function(){ <br>$(this).addClass("divCurrColor") <br>.next( ".divContent").css("display","block"); <br>}); <br>}); <br></script> <br></head> <br>< body> <br><div class="divFrame"> <br><div class="divTitle">theme</div> <br><div class="divContent"> <br> <a href="#">Link 1</a><br /> <br><a href="#">Link 2</a><br /> <br><a href="#">Link three</a> <br></div> <br></div> <br></body> <br></html> ; <br>
</div> <br>In the code of the above file, the code in bold is chain writing. <br> Code function description: When the user clicks on the element with the Class name "divTitle", a style named "divCurrColor" is added to itself; at the same time, the next element with the Class name "divContent" is displayed. It can be seen that the implementation of the two functions is linked together through the "." symbol. <br><strong> (3) Page effect </strong> <br>Execute HTML file 1-2.html, and the achieved page effect is shown in Figure 1-3.
<p><img src="/static/imghw/default1.png" data-src="http://files.jb51.net/file_images/article/201301/2013010315262084.jpg" class="lazy" alt=""><br></p>
<p>After clicking: </p>
<p><img src="/static/imghw/default1.png" data-src="http://files.jb51.net/file_images/article/201301/2013010315262085.jpg" class="lazy" alt=""><br></p>
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