Embed images in HTML requires the <img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175381527346690.jpeg" class="lazy" alt="Embedding Images in HTML Documents" > tag and the properties are set correctly. 1. Use the src attribute to specify the image path, which can be a relative path, an absolute path or a root relative path; 2. The alt attribute must be added to improve accessibility and SEO; 3. Set width and height attributes to avoid layout re-arrangement; 4. It is recommended to use relative paths for easy development, and CDN absolute paths can be used after going online; 5. Optimized loading can be used to compress images, use WebP format, add loading="lazy", and use srcset and sizes to achieve responsive images. These steps ensure that the image is displayed correctly and improve page performance.

The key to embedding images in HTML documents is to use the correct tags and attributes to ensure that the images can be displayed normally and that the page loading efficiency is not affected. The most common way is to use the <img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175381527428013.jpeg" class="lazy" alt="Embedding Images in HTML Documents" > tag, which is a self-closed tag and does not require an end tag.

Insert image using <img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175381527346690.jpeg" class="lazy" alt="Embedding Images in HTML Documents" > tag

To display pictures on web pages, the most basic and most common method is to use the <img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175381527346690.jpeg" class="lazy" alt="Embedding Images in HTML Documents" > tag and match src and alt attributes.

• src attribute specifies the path to the image, which can be a relative path or an absolute path.
• alt attribute is used to display alternative text when an image cannot be loaded, and is also important for accessibility and SEO.

For example:

 <img src="/static/imghw/default1.png"  data-src="images/photo.jpg"  class="lazy" alt="A sample picture">

In addition, width and height properties can be added to specify the image display size to avoid page layout reordering.

The picture path is very particular

Wrong path writing is a common reason why the image cannot be displayed. The paths are mainly divided into the following types:

• Relative path : relative to the location of the current HTML file. For example: images/logo.png
• Absolute path : full URL, for example: https://example.com/images/logo.png
• Root relative path : starts with / , indicating that it starts from the website root directory, for example: /images/logo.png

It is recommended to use more relative paths during development to facilitate local debugging and migration. After going online, if unified resource management is required, you can use the absolute path of the CDN.

A few tips to improve loading experience

Slow image loading will affect the user experience. Here are a few practical tips:

• Compress images and use appropriate formats (such as WebP is more efficient than JPEG)
• Use loading="lazy" to achieve lazy loading and lazy loading images that are not in the viewport
• Use srcset and sizes to provide responsive image support, adapt to different devices

For example, use lazy loading:

 <img src="/static/imghw/default1.png"  data-src="photo.jpg"  class="lazy" alt="Scenic Photo" loading="lazy">

For example, provide multi-resolution pictures:

 <img src="/static/imghw/default1.png"  data-src="small.jpg"  class="lazy" 
  srcset="medium.jpg 1000w, large.jpg 2000w" 
  sizes="(max-width: 600px) 480px, 1000px" 
  alt="Responsive Picture Example"
>

These methods can effectively improve page performance and user experience.

Basically all this is it, embedding images is not complicated but details are easily overlooked, such as paths, formats and performance optimizations. By sorting out these points, you can display pictures stably on the web page.

The above is the detailed content of Embedding Images in HTML Documents. For more information, please follow other related articles on the PHP Chinese website!