Detailed explanation of the steps to dynamically load css files with jQuery

This time I will bring you a detailed explanation of the steps for jQuery to dynamically load css files. What are the precautions for jQuery to dynamically load css files? The following is a practical case, let's take a look.

Sometimes we may need to use jQuery to load an external css file, such as when switching

page layout. The idea is to create a link element and add it to the tag. Let's first see how to use jQuery to achieve it.

The following is my favorite writing method:

$("")
.attr({ rel: "stylesheet",
type: "text/css",
href: "site.css"
})
.appendTo("head");

Some friends may use the following writing method, but the form is slightly different (append appendTo), the principle is still the same.

$("head").append("");
css = $("head").children(":last");
css.attr({
rel: "stylesheet",
type: "text/css",
href: "/Content/Site.css"
});

Finally, some friends may want to use it directly in javascript. The method is as follows:

function addCSS() {
var link = document.createElement('link');
link.type = 'text/css';
link.rel = 'stylesheet';
link.href = '/Content/Site.css';
document.getElementsByTagName("head")[0].appendChild(link);
}

If it is during web interaction, we can use the above method to introduce a css file, otherwise it is recommended to use the original method.

Below I also introduce an example that can load js and css

The code is as follows

$.extend({
includePath: '',
include: function(file) {
var files = typeof file == "string" ? [file]:file;
for (var i = 0; i < files.length; i++) {
var name = files[i].replace(/^s|s$/g, "");
var att = name.split('.');
var ext = att[att.length - 1].toLowerCase();
var isCSS = ext == "css";
var tag = isCSS ? "link" : "script";
var attr = isCSS ? " type='text/css' rel='stylesheet' " : " language='javascript' type='text/javascript' ";
var link = (isCSS ? "href" : "src") + "='" + $.includePath + name + "'";
if ($(tag + "[" + link + "]").length == 0) document.write("<" + tag + attr + link + ">");
}
}
});
//使用方法
$.includePath = 'http://hi.xxx/javascript/'; 
$.include(['json2.js', 'jquery.tree.js', 'jquery.tree.css']);

A complete example

index.html

Blue
Orange
Yellow
Default

Tab1 Tab2 Tab3 Tab4 Tab5

Lorem ipsum dolor sit amet

copyright yoursite 2011



default.css
body{
background-color:#ffffff;
font-family:"arial";
}
.theme{
margin:10px;
width:70px;
padding:5px;
text-align:center;
background-color:#BEF781;
border:solid #333333 1px;
color:#444444;
font-weight:bold;
cursor:pointer;
}
.container{
margin-left:auto;
margin-right:auto;
width:700px;
}
.inner{
padding:20px;
border:solid #333333 1px;
}
.menu{
background-color:#f2f2f2;
padding:10px;
font-weight:bold;
}
.footer{
background-color:#f9f9f9;
padding:5px;
}
blue.css
body{
background-color:#2E9AFE;
font-family:"arial";
}
.theme{
margin:10px;
width:70px;
padding:5px;
text-align:center;
background-color:#BEF781;
border:solid #333333 1px;
color:#444444;
font-weight:bold;
cursor:pointer;
}
.container{
margin-left:auto;
margin-right:auto;
width:700px;
}
.inner{
padding:20px;
border:solid #333333 1px;
background-color:#58ACFA;
color:#ffffff;
}
.menu{
background-color:#f2f2f2;
padding:10px;
font-weight:bold;
}
.footer{
background-color:#f9f9f9;
padding:5px;
}
yellow.css
body{
background-color:#F7FE2E;
font-family:"arial";
}
.theme{
margin:10px;
width:70px;
padding:5px;
text-align:center;
background-color:#BEF781;
border:solid #333333 1px;
color:#444444;
font-weight:bold;
cursor:pointer;
}
.container{
margin-left:auto;
margin-right:auto;
width:700px;
}
.inner{
padding:20px;
border:solid #333333 1px;
background-color:#f6f6f6;
}
.menu{
background-color:#F2F5A9;
padding:10px;
font-weight:bold;
}
.footer{
background-color:#F2F5A9;
padding:5px;
}
orange.css
body{
background-color:#FE9A2E;
font-family:"arial";
}
.theme{
margin:10px;
width:70px;
padding:5px;
text-align:center;
background-color:#BEF781;
border:solid #333333 1px;
color:#444444;
font-weight:bold;
cursor:pointer;
}
.container{
margin-left:auto;
margin-right:auto;
width:700px;
}
.inner{
padding:20px;
background-color:#F7BE81;
color:#404040;
}
.menu{
background-color:#ffffff;
padding:10px;
font-weight:bold;
color:#FFBF26;
}
.footer{
background-color:#ffffff;
padding:5px;
color:#FFBF26;
}

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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The above is the detailed content of Detailed explanation of the steps to dynamically load css files with jQuery. For more information, please follow other related articles on the PHP Chinese website!