Detailed introduction to how to add images in HTML

In website production, pictures are one of the very important elements, adding more visual effects and beauty to the website. Therefore, how to add pictures in HTML has become an important issue. This article will introduce readers to how to add images in HTML in detail, hoping to help readers better master website production skills.

1. Basic image reference syntax

In HTML, adding an image is actually adding an image reference syntax to the HTML document. In HTML, use the tag to reference an image. The basic syntax is as follows:

Among them, the src attribute represents the address of the referenced picture, which can be local The path of the image can also be the image address pointing to the remote server. The alt attribute represents the description information of the image. If the image cannot be displayed normally for some reason, the information of the alt attribute will replace the original display information of the image.

For example, if you want to add a picture named example.png in HTML, and the picture is in the images folder under C:\ of the local hard disk, then the code using the picture reference syntax is as follows:

In HTML, there are some other attributes for using images, For example, width represents the width of the picture, height represents the height of the picture, border represents the border size of the picture, and so on. Through these properties, you can have more settings and control over the image.

2. Relative paths and absolute paths

In the above, we demonstrated the method of referencing images by using absolute paths in the src attribute. In fact, in website production, we can also use relative paths to reference images. Relative paths are relative to the path of the HTML document. It can make quoting images on the website easier and more convenient.

There are two types of relative paths, namely absolute relative paths and relative relative paths. Among them, the absolute relative path means that when referencing the image, it first jumps to another directory, and then makes a relative reference based on the directory. A relative path is referenced relative to the current document.

Take the file directory as an example, if there is the following file directory:

home/

|____ index.html
|____ images/
        |____ pic1.jpg
        |____ pic2.jpg

To reference the pic1.jpg picture in the images folder in index.html, It can be referenced through the relative path method, that is, using ../ to represent the upper-level directory, the code is as follows:

3. Image format

In actual website production, commonly used image formats include JPEG, PNG, GIF, etc. Compared with the other two formats, the JPEG format has a higher compression ratio, which can save image storage space. The PNG format supports transparent backgrounds and does not suffer from the blurring and distortion of JPEG format images. The GIF format supports animation and transparent backgrounds, but its color depth is lower than JPEG and PNG formats.

In order to make the page load faster and improve the visitor experience, website developers need to consider the size and quality of the image, loading speed, performance and other factors when selecting the image format.

4. Summary

In this article, we introduce in detail how to add images in HTML, and introduce the image format, relative path and absolute path to readers. Pictures are one of the very important elements in website production. Creating beautiful images can add a lot of vitality and appeal to a website, so mastering the skills of adding images in HTML is a very important part for website makers.

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