What does alt mean in html

Alt in html is a parameter attribute. The function of alt is to display alt text as a remedial measure when the object of the HTML element itself cannot be rendered; the alt attribute is mainly used for img and area elements. middle.

The operating environment of this article: Windows7 system, HTML5&&CSS3 version, Dell G3 computer.

alt is a parameter attribute used in web languages ​​HTML and XHTML to output plain text. Its function is to display alt (replacement) text as a remedial measure when the object of the HTML element itself cannot be rendered. .

The alt attribute is mainly used for the two img and area elements. The syntax of the alt attribute is as follows:

<img alt="..." />
<area alt="..." />

alt is a required attribute, which specifies the alternative text when the image cannot be displayed. The alt attribute is used to describe the image on the web page. The prompt displayed when the cursor is on the image is implemented using this tag.

If the user cannot view the image due to the following reasons, the alt attribute can provide alternative information for the image:

1. The network speed is too slow.

2. Error in the src attribute

3. The browser disables images

4. The user is using a screen reader

The alt attribute of the tag specifies alternative text for use in images Content that is displayed in the browser instead of the image when it cannot be displayed or when the user disables image display.

Function

From the perspective of SEO and user experience, ALT-replacement attributes are necessary. Their importance mainly includes: Web page content relevance is keyword optimization The premise is that search engines believe that the pictures on the web page should be related to the theme of the web page.

Conversely, when search engines want to determine the keywords of a web page, the ALT-replacement attribute of the image is a trusted reference point. So, don’t forget to replace the attribute

in the ALT attribute of the image

Importance

The alt attribute of the image is the only image information that search engines can recognize. Therefore, when optimizing the website When using alt attributes, try to use the alt attribute to describe the theme content of the image, but avoid overlapping keywords. The image attribute not only tells the search engine the main information of the image, but also allows visitors to understand when the image fails to load. Understand what the picture says!

is used to describe the pictures on the web page. The prompt displayed when the cursor is on the picture is implemented using this tag. From the perspective of SEO and user experience, ALT-replacement attributes are necessary, and their importance mainly includes:

Relevance of web page content is the prerequisite for keyword optimization. Search engines believe that pictures on web pages should be consistent with Web page theme related. Conversely, when search engines want to determine the keywords of a web page, the ALT-alternative attribute of the image is a trusted reference point.

So, don’t forget to add the keywords of the web page in the ALT-replacement attribute of the image. Sometimes the images on the web page cannot be displayed due to some reasons, such as using a screen reader, low bandwidth, network obstruction, etc.

Descriptive ALT-in-place attributes can add to the user experience by telling the user what is at that location. All legitimate websites should do this. Sometimes, if there is no ALT-replacement attribute, users will not understand what the image represents and why it is placed on this page.

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