1. Html Responsive Text
2. How To Make Html Responsive

With HTML image maps, you can create clickable areas on an image.

Html Responsive Text

The HTML map tag defines an image map. An image map is an image with clickable areas. The areas are defined with one or more tags. Try to click on the computer, phone, or the cup of coffee in the image below. Thanks to the rise of Flash technology, image maps are rarely used anymore. However, CSS does allow you to create an image map with some subtle mouse over effects with a few slick modifications to.

Image Maps

Sounds like what we want is the ability to upload a JPEG or similar to an app that lets you specify map locations on the image (such as at image-map dot net) - in the background, this produces an SVG file that is essentially transparent. We then want the map to apply to the SVG and to render the SVG on top of the JPG in the web browser.

The HTML <map> tag defines an image map. An image map is an image with clickable areas. The areas are defined with one or more <area> tags.

Try to click on the computer, phone, or the cup of coffee in the image below:

Example

Here is the HTML source code for the image map above:

How Does it Work?

The idea behind an image map is that you should be able to perform different actions depending on where in the image you click.

To create an image map you need an image, and some HTML code that describes the clickable areas.

The Image

The image is inserted using the <img> tag. The only difference from other images is that you must add a usemap attribute:

The usemap value starts with a hash tag # followed by the name of the image map, and is used to create a relationship between the image and the image map.

Create Image Map

Then, add a <map> element.

The <map> element is used to create an image map, and is linked to the image by using the required name attribute:

The name attribute must have the same value as the <img>'s usemap attribute .

The Areas

Then, add the clickable areas.

How To Make Html Responsive

A clickable area is defined using an <area> element.

Shape

You must define the shape of the clickable area, and you can choose one of these values:

• rect - defines a rectangular region
• circle - defines a circular region
• poly - defines a polygonal region
• default - defines the entire region

You must also define some coordinates to be able to place the clickable area onto the image.

Shape='rect'

The coordinates for shape='rect' come in pairs, one for the x-axis and one for the y-axis.

So, the coordinates 34,44 is located 34 pixels from the left margin and 44 pixels from the top:

The coordinates 270,350 is located 270 pixels from the left margin and 350 pixels from the top:

Now we have enough data to create a clickable rectangular area:

Example

This is the area that becomes clickable and will send the user to the page 'computer.htm':

Shape='circle'

To add a circle area, first locate the coordinates of the center of the circle:

337,300

Then specify the radius of the circle:

44 pixels

Now you have enough data to create a clickable circular area:

Example

This is the area that becomes clickable and will send the user to the page 'coffee.htm':

Shape='poly'

The shape='poly' contains several coordinate points, which creates a shape formed with straight lines (a polygon).

This can be used to create any shape.

Like maybe a croissant shape!

How can we make the croissant in the image below become a clickable link?

We have to find the x and y coordinates for all edges of the croissant:

The coordinates come in pairs, one for the x-axis and one for the y-axis:

Example

This is the area that becomes clickable and will send the user to the page 'croissant.htm':

Image Map and JavaScript

A clickable area can also trigger a JavaScript function.

Add a click event to the <area> element to execute a JavaScript function:

Example

Here, we use the onclick attribute to execute a JavaScript function when the area is clicked:

Chapter Summary

• Use the HTML <map> element to define an image map
• Use the HTML <area> element to define the clickable areas in the image map
• Use the HTML usemap attribute of the <img> element to point to an image map

HTML Image Tags

For a complete list of all available HTML tags, visit our HTML Tag Reference.