How to use the img image tag in HTML/XHTML

This time I will show you how to use the img image tag in HTML/XHTML. What are the precautions for using the img image tag in HTML/XHTML? The following is a practical case, let’s take a look. take a look.

The image tag is used to display an image on a web page.

HTML/XHTML image tag
In XHTML, the tag is used to define an image to be displayed. is an unpaired tag.

Basic syntax:

tag determines the source of the image through the src

attribute. The url is a relative or absolute image address.

Image tag attributes:

src:
Image source, required. Specify the source address of the displayed image, which can be a relative address or an absolute address. alt: Replaceable text, can be omitted. It is used to replace the text displayed when the image cannot be displayed or the browser blocks the image.
title: image prompt text, can be omitted. When the mouse hovers over the picture, relevant text will be prompted.

width: The width of the image display, can be omitted. Units are pixels.
height: The height of the image display, which can be omitted. Units are pixels.

Text replacement attribute (alt)

Text replacement attribute of image tag alt Although it is not a required attribute, it is a very important attribute. When the browser fails to read the image for some reason, this alternative text will be displayed to replace the original image to provide the lost relevant image information. This attribute also helps users using text-only browsers understand the content of the page.
Therefore, it is a good habit to add a meaningful alt text replacement attribute to each image.

Specify the image display size

You can add the width or height attribute to the tag to manually specify the image display size:

Tips

General situation The image size attribute will be ignored and the original image size or browser adaptive size display will be displayed by default. Specifying an inappropriate image display size may cause the image to appear distorted.
Since it takes a certain amount of time to load images, you should try to reduce the size of the image while ensuring the image quality to achieve a good user access experience.

Extended reading

Pixel: We can vividly think of a pixel as the smallest point that a computer can display. For example, the screen resolution we often say is 1024*768, which means the screen There are 1024 (pixels) dots horizontally and 768 (pixels) dots vertically. When used as a unit, it is generally written as pix by default.

I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!

Related reading:

How to make the Table display a border

How to implement the download function in html

What is the difference between class and id when marking HTML elements

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