Wheelzoom
A small script for zooming IMG elements with the mousewheel/trackpad. Wheelzoom works by replacing the img element's src with a transparent image, then using the original src as a background image, which can be sized and positioned. Wheelzoom is dependency free, doesn't add any extra elements to the DOM, or change the positioning of the IMG element.
Usage:
wheelzoom(document.querySelectorAll('img'));
// or
wheelzoom(document.querySelectorAll('img'), {zoom:0.05});
// zoom sets the zoom percent.
License
MIT License
Supported Browsers:
Chrome, Safari, Opera, FireFox 17+, IE9+.
Changelog:
v.4.0.1 - 2019/08/13
- Added initialX and initialY for setting the initial zoomed coordinates
v.4.0.0 - 2018/10/09
- Replaced canvas data URI with base64 svg for creating placeholder
- Dropped IE9 support
v.3.1.3 - 2018/01/31
- Added 'initialZoom' option. Resolves #32
v.3.1.2 - 2017/04/20
- Added package.json & added to NPM.
v.3.1.0 - 2017/04/10
- Added 'maxZoom' option for maximum zoom level.
v.3.0.4 - 2015/12/15
- Automatically account for changes to the img src, to avoid requiring manually calling destroy and reapply.
v.3.0.3 - 2015/09/05
- Fixed zoom positioning issue in Firefox. Fixes #17
- Fixed error when calling destroy in Firefox. Fixes #16
- Removed debugging statement. Fixes #15
v.3.0.2 - 2015/09/05
- Fixed lint warnings and bug introduced in 3.0.1
v.3.0.1 - 2015/09/05
- Fixed issue with src URLs that contain single quotes. Fixes #13.
v.3.0.0 - 2014/10/14
- Removed jQuery dependency
- Added 'wheelzoom.destroy' event for removing changes that wheelzoom has made to an element.
v.2.0.1 - 2014/9/9
- Merged bugfix to wrap background-image path in quotes. Ref #8.
v.2.0.0 - 2014/4/17
- Simplified by dropping support for having border and padding on the img element. Borders and/or padding should be applied to the parent element, rather than the img element.
v.1.1.3 - 2014/4/13
v.1.1.2 - 2013/1/31
- Fixed bug with unzoom trigger.
v1.1.1 - 2013/1/29
v1.1.0 - 2012/11/28
v1.0 - 2012/11/26