A brief discussion on what scr and href are in HTML? What is the difference between scr and href?

What are scr and href in html? What is the difference between scr and href? This article will introduce to you the difference between scr and href in HTML, so that everyone can understand what src and href are, so that everyone can distinguish scr and href well. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

When writing code, we often confuse the two attributes scr and href, and we can’t tell them apart; then let’s take a look at the two attributes scr and href, and then take a look at the HTML What is the difference between src and href?

What is src in html?

src is the abbreviation of source, which represents a reference to an external file and represents the location pointing to an external resource. The pointed content will be applied to the location of the current tag in the document (in simple terms: the purpose is To load the referenced file into the specified location of the html page).

The src attribute is an indispensable part of the page content. It is commonly used in js scripts, img pictures, frames and other elements. For example: What is href in

<script src="script.js"></script> 
<script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js">

<img  src="/static/imghwm/default1.png"  data-src="2.png"  class="lazy"   / alt="A brief discussion on what scr and href are in HTML? What is the difference between scr and href?" >
<img  src="/static/imghwm/default1.png"  data-src="https://apps.bdimg.com/img/2.png"  class="lazy"   / alt="A brief discussion on what scr and href are in HTML? What is the difference between scr and href?" >

html?

href is the abbreviation of Hypertext Reference, which represents a hypertext reference. It represents the location of a network resource and establishes a link to the current element (anchor) or current document. It is linked to the page. A direct relationship is a linked relationship.

Commonly used ones are: link, a. For example: What is the difference between src and href in

<link href="reset.css" rel=”stylesheet“/>

<a href="https://www.php.cn/"></a>

html?

1. Differences in request resource types

(1) When requesting the src resource, the resource pointed to will be downloaded and applied to the document, such as a js script, img picture, frame;

(2) href indicates the location of the network resource and is used to establish a connection with the current element or current document.

2. The difference between the results

(1) src attribute: used to replace the current content;

(2) href attribute: used between the current document and Establish connections between referenced resources;

3. Differences in browser parsing methods

(1) When the browser parses This sentence will pause the downloading and processing of other resources until the resource is loaded, compiled, and executed. The same is true for pictures and frames, which is similar to applying the pointed resource to the current content. . This is why it is recommended to place js scripts at the bottom instead of the head.

Attachment: If you put js in the head, you must use src to introduce the external js file. Using the defer="defer" attribute will wait for the html document to be loaded before executing the js code, but the defer attribute can only Used in IE browser.

(2) If is added to the document, the browser will recognize the document as CSS file, the resources will be downloaded in parallel without stopping processing of the current document. This is why it is recommended to use the link method to load CSS instead of using the @import method.

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study. For more related tutorials, please visit HTML video tutorial, CSS basic video tutorial, bootstrap tutorial!

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