responsive-map-areas

Automatically changes the coordinates of areas inside an HTML image map depending on the size of the image

Features

An emphasis was put on the simplicity of use.

Summary

When you make an image map, you want the image to be responsive, but the areas are absolute values which make your links go some random places, making them useless... This script calculates the ratio from the original size of the image and the absolute values in your area coords arguments, and change their coordinates values according to the size of the related image.

Multiple usage

You can call the function multiple times on different maps on the same page or you can call one general function for all the maps in your page.

Multiple areas and area coordinates

No matter how many areas you have in your map, or how many coords your shapes have. Or whatever the shape (polygon, rect, circle or default).

Windows resize responsive

You can resize the window, it will work.

How-to

Just add the path to your minified script somewhere in your code (e.g. in the head section) Example:

<script src="js/ResponsiveMapAreas.min.js"></script>

To make all your maps responsive, call the general function with no arguments:

<script>
  makeAllResponsive()
</script>

Call the function on each of your maps like this:

<script>
  // ARGUMENTS
  // the id of your map
  makeResponsive('my_map')
</script>

Be careful to add an id to your map element. Calls to the functions must be made after all your maps elements. We recommend calling the functions just before the closing </body> tag

Detailed instructions are in the source of the demo file index.html

Source file

Feel free to play with the source file, just be aware it is written in ES2020, so you might need a transpiler (e.g. Babel)

Enjoy

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Credits demo image: Photo by Tyler Nix