What is src in HTML

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Introduction: The Role of the src Attribute in HTML

In HTML, the src attribute plays a crucial role in embedding external resources like images, scripts, and other media files into a webpage. This article will provide an in-depth explanation of the src attribute, its usage in various HTML elements, and best practices for working with it. By the end of this article, you’ll have a solid understanding of how to use the src attribute effectively in your HTML projects.

Using the src Attribute with the img Element

The most common use of the src attribute is with the img element, which embeds an image into a webpage. The src attribute specifies the URL of the image file, which can be either a relative or absolute path. Here’s an example of using the src attribute with an img element:

<img src="path/to/image.jpg" alt="A descriptive text for the image">

Note that it’s essential to include the alt attribute alongside the src attribute, as this provides a textual description of the image for accessibility purposes and in cases where the image cannot be loaded.

Using the src Attribute with the script Element

Another common use of the src attribute is with the script element, which embeds external JavaScript files into a webpage. In this case, the src attribute specifies the URL of the JavaScript file. Here’s an example:

<script src="path/to/script.js"></script>

It’s important to note that when the src attribute is used with a script element, any code written directly between the opening and closing script tags will be ignored.

Using the src Attribute with the iframe Element

The src attribute can also be used with the iframe element, which allows you to embed an external webpage within your current webpage. The src attribute specifies the URL of the external webpage. Here’s an example:

<iframe src="https://www.example.com/" width="600" height="400"></iframe>

Keep in mind that using iframes may have security and usability implications, so always use them judiciously and with caution.

Best Practices and Tips for Using the src Attribute

Here are a few best practices to follow when working with the src attribute in HTML:

  • Always use meaningful and descriptive filenames for your resources, making it easier for both you and others to understand their purpose.
  • Whenever possible, use relative paths instead of absolute paths, as this makes your code more portable and easier to maintain.
  • For accessibility and SEO purposes, always include the alt attribute when using the src attribute with img elements.
  • Consider using the async or defer attributes when embedding external JavaScript files with the script element to improve page loading performance.
  • Be mindful of the security and privacy implications when using the src attribute with iframe elements, and ensure you follow the best practices for embedding external content.


The src attribute in HTML is a versatile and essential tool that enables you to embed external resources such as images, scripts, and webpages into your HTML documents. By understanding how the src attribute works with various HTML elements and following the best practices outlined in this article, you can create more efficient, accessible, and user-friendly webpages. So, the next time you work on an HTML project, remember the importance of the src attribute and how to use it effectively.

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