(PDF) HTML Images Tag with Example :- Infinity4Education
HTML Images
Images
can improve the design and the appearance of a web page.
Example
<img src="pic_trulli.jpg" alt="Italian Trulli">
Example
<img src="img_girl.jpg" alt="Girl in a jacket">
Example
<img src="img_chania.jpg" alt="Flowers in Chania">
HTML Images Syntax
In
HTML, images are defined with the <img> tag.
The <img> tag is empty, it contains
attributes only, and does not have a closing tag.
The src attribute specifies the URL (web
address) of the image:
<img src="url">
The alt Attribute
The alt attribute provides an alternate
text for an image, if the user for some reason cannot view it (because of slow
connection, an error in the src attribute, or if the user uses a screen
reader).
The
value of the alt attribute should describe the image:
Example
<img src="img_chania.jpg" alt="Flowers in Chania">
If
a browser cannot find an image, it will display the value of the alt attribute:
Example
<img src="wrongname.gif" alt="Flowers in Chania">
Note: The alt attribute is required. A web page
will not validate correctly without it.
Image Size - Width
and Height
You
can use the style attribute to specify the width and height of
an image.
Example
<img src="img_girl.jpg" alt="Girl in a jacket" style="width:500px; height:600px;">
Alternatively,
you can use the width and height attributes:
Example
<img src="img_girl.jpg" alt="Girl in a jacket" width="500" height="600">
The width and height attributes always define the
width and height of the image in pixels.
Note: Always
specify the width and height of an image. If width and height are not
specified, the page might flicker while the image loads.
Width and Height, or
Style?
The width, height, and style attributes are valid in HTML.
However,
we suggest using the style attribute. It prevents styles sheets from
changing the size of images:
Example
<!DOCTYPE html>
<html>
<head>
<style>
img {
width: 100%;
}
</style>
</head>
<body>
<img src="html5.gif" alt="HTML5 Icon" width="128" height="128">
<img src="html5.gif" alt="HTML5 Icon" style="width:128px;height:128px;">
</body>
</html>
<html>
<head>
<style>
img {
width: 100%;
}
</style>
</head>
<body>
<img src="html5.gif" alt="HTML5 Icon" width="128" height="128">
<img src="html5.gif" alt="HTML5 Icon" style="width:128px;height:128px;">
</body>
</html>
Images in Another
Folder
If
not specified, the browser expects to find the image in the same folder as the
web page.
However,
it is common to store images in a sub-folder. You must then include the folder name
in the src attribute:
Example
<img src="/images/html5.gif" alt="HTML5 Icon" style="width:128px;height:128px;">
Images on Another
Server
Some
web sites store their images on image servers.
Actually,
you can access images from any web address in the world:
Example
<img src="https://www.Infinity4Education.com/images/Infinity4Education_green.jpg" alt="Infinity4Education.com">
Animated Images
HTML
allows animated GIFs:
Example
<img src="programming.gif" alt="Computer Man" style="width:48px;height:48px;">
Image as a Link
To
use an image as a link, put the <img> tag inside the <a> tag:
Example
<a href="default.asp">
<img src="smiley.gif" alt="HTML tutorial" style="width:42px;height:42px;">
</a>
<img src="smiley.gif" alt="HTML tutorial" style="width:42px;height:42px;">
</a>
Image Floating
Use
the CSS float property to let the image float to the right
or to the left of a text:
Example
<p><img src="smiley.gif" alt="Smiley face" style="float:right;width:42px;height:42px;">
The image will float to the right of the text.</p>
<p><img src="smiley.gif" alt="Smiley face" style="float:left;width:42px;height:42px;">
The image will float to the left of the text.</p>
The image will float to the right of the text.</p>
<p><img src="smiley.gif" alt="Smiley face" style="float:left;width:42px;height:42px;">
The image will float to the left of the text.</p>
HTML Screen Readers
A
screen reader is a software program that reads the HTML code, converts the
text, and allows the user to "listen" to the content. Screen readers
are useful for people who are visually impaired or learning disabled.
Chapter Summary
- Use the HTML <img> element to define an image
- Use the HTML src attribute to define the URL of the image
- Use the HTML alt attribute to define an alternate text for an image, if it
cannot be displayed
- Use the HTML width and height attributes to define the size of the image
- Use the CSS width and height properties to define the size of the image (alternatively)
- Use the CSS float property to let the image float
Loading images takes time. Large images can slow
down your page. Use images carefully.
HTML Image Tags
|
Tag
|
Description
|
|
<img>
|
Defines an image
|
|
<map>
|
Defines an image-map
|
|
<area>
|
Defines a clickable area inside an image-map
|
|
<picture>
|
Defines a container for multiple image resources
|
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