The differences between src and href are explained in detail to help you understand them thoroughly!

src and href are two common attributes in web development, used to introduce external resources. Although they can be used interchangeably in many situations, there are some obvious differences between them. This article will explain the difference between src and href in detail and provide specific code examples to help readers understand better.

1. The introduced objects are different
src is used to embed external resources, such as pictures, scripts and audio. It specifies the specific location and file name of the resource to be used. src is usually used in tags such as img, script, audio and video, as shown below:

<img  src="/static/imghwm/default1.png"  data-src="image.jpg"  class="lazy" alt="The differences between src and href are explained in detail to help you understand them thoroughly!" >
<script src="script.js"></script>
<audio src="audio.mp3"></audio>

and href is mainly used for links to external resources, such as CSS files, hyperlinks, etc. It specifies the URL address of the target resource to be linked. href is usually used in tags such as link and a, as shown below:

<link rel="stylesheet" href="style.css">
<a href="https://www.example.com">访问示例网站</a>

2. Different loading methods
Resources introduced through src need to be loaded and parsed by the browser, which will block the rendering of the page , until the resource is loaded. This means that if there are multiple resources introduced using src in the web page, the page loading time will be extended. Generally speaking, it is recommended to place scripts at the bottom of the body tag to avoid blocking page loading.

The resources introduced through href are loaded at the same time as the page is rendered, and will not block the display of the page. This allows multiple external resources to be loaded in parallel while the page is loading, improving page loading speed. A common scenario for using href is to introduce CSS files, as shown below:

<link rel="stylesheet" href="style.css">

3. Different scopes of application
src can be used to embed various types of resources, including pictures, scripts, audio and video, etc. . It can be applied to a variety of tags, such as img, script, audio, video, etc., to embed different types of resources.

The href is mainly used to introduce links to external resources. It is commonly used in tags such as link and a to create hyperlinks or link to external resources such as CSS files.

To sum up, src and href have the following differences when introducing external resources:

• src is used to embed external resources, and href is used to link to external resources.
• Src requires the browser to load and parse resources, which will block the rendering of the page; while href loads resources while the page is rendering and will not block the page display.
• src is suitable for a variety of tags and is used to embed various types of resources; href is mainly used in tags such as link and a to introduce links to external resources.

I hope that through the explanation of this article, readers can better understand the difference between src and href and use them correctly in actual web development.

The above is the detailed content of The differences between src and href are explained in detail to help you understand them thoroughly!. For more information, please follow other related articles on the PHP Chinese website!