HTML Image Tag
HTML Images are defined within <img> tag. Image tag or <img> is a unpair element.
alt attributes are used to add properties to image.
HTML includes image tag from its 4th version (HTML4) ie since 1997. Images enhance the look and feel of a website. We uses images as a logo, banner, icons, symbols, product etc.
How to insert image in html
<img src="" alt="">
HTML Images Formats and Comparision
Html supports four popular images extensions, jpg, png, gif and svg.
Image extensions for web
- Joint Photographic Gallery (jpg)
- Portable Network Graphics (png)
- Graphics Interchange Format (gif)
- Scalable Vector Graphics (svg)
How to insert image in a webpage
Image is inserted in html using <img> tag. Img is an non-pair element. src and alt attributes are compulsory in an img tag. width and height are optional in img. By increasing width or height, image size increase with same aspect-ratio. Aspect Ratio is ratio of width Vs height. For an image of size 400*300, aspect ratio is 4:3.
HTML image tag example
<img src="logo.png" alt="alternate text of image" >
|src||source or path of image ( compulsory )|
|alt||alternate text for image ( compulsory )|
|title||show tooltip on mouse over|
|width||control width of an image|
|height||control height of an image|
alt attribute is the compulsory attribute for image tag. It helps google and other search engines to search images in search results. If in any case image fail to upload, alt text hold the space and tell user about image.
What happen if src is invalid in image?
<img src="img/logo" alt="Tech Altum Logo">
alt attribute is compulsory, but value of alt can be blank.