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Overlays a full screen preview of a thumbnail.
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photozoom.js: Photo Zoom

Overlays a full screen preview of a thumbnail.

Try the demo.

How to include the script

The stylesheet is best included in the header of the document.

<link rel="stylesheet" href="./css/photozoom.css"/>

This include can be added to the header or placed inline before the script is invoked.

<script src="./js/photozoom.js"></script>

How to start the script

var photozoom = new Photozoom({
	'elements' : document.querySelectorAll('#photozoom a'),
	'container' : document.body,
	'zoom' : 2,
	'sizer' : 'php/imagesize.php?src=../{src}',
	'slicer' : 'php/imageslice.php?src=../{src}&{size}',

'elements' : {array} - A collection of target elements.

'container' : {element} - Restrict the popup to a container.

'zoom' : {number} - Maximum zoom factor for the touch controls.

'sizer' : {string} - Optional web-service for measuring images. An example is provided as ./php/imagesize.php.

'slicer' : {string} - Optional web-service for resizing images. An example is provided as ./php/imageslice.php.

How to control the script


Shows the popup belonging to instance.



Hides the popup.

How to build the script

This project uses node.js from

This project uses gulp.js from

The following commands are available for development:

  • npm install - Installs the prerequisites.
  • gulp import - Re-imports libraries from supporting projects to ./src/libs/ if available under the same folder tree.
  • gulp dev - Builds the project for development purposes.
  • gulp dist - Builds the project for deployment purposes.
  • gulp watch - Continuously recompiles updated files during development sessions.
  • gulp serve - Serves the project on a temporary www server at http://localhost:8500/.
  • gulp php - Serves the project on a temporary php server at http://localhost:8500/.


This work is licensed under a Creative Commons Attribution 3.0 Unported License. The latest version of this and other scripts by the same author can be found at

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