What is the role of alt attribute in img tag

Function:

The alt attribute of the tag specifies the alternative text, which is used to replace the image when the image cannot be displayed or the user disables the image display. The content of the image displayed in the browser.

The alt attribute is a required attribute that specifies alternative text when the image cannot be displayed.

Assuming that 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. The src attribute in Error;

3. The browser disables images;

4. The user is using a screen reader.

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