What is the use of adding alt tags in html

Editor to share with you what is the use of adding alt tags in html, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

See that the picture does add alt, when dabbling in the browser, when the mouse over this picture, but does not reflect any calligraphy.

Cause of the problem:

Alt only indicates the picture, when the picture does not exist or the path error is not reflected, the reader will display alt ink space-occupying pictures.

Plot:

Add the title attribute to img, it will be set in title calligraphy, the mouse will show, in addition to img may set equipment equipment title, other div, P, span and other tags can set equipment equipment.

Complete the mouse to display calligraphy on the picture.

Mouse on the picture to show the calligraphy code:

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