Manually adjusting line-height for optimum readability across a bunch of media queries is kind of a pain. With Molten Leading you can set a minimum width at which the adjustment starts, a maximum element width where it stops, and a minimum and maximum line height to adjust through.
All the work here is based on @Wilto’s Molten-Leading jQuery version of the plugin.
- Automatically adjust line-height based on element width for optimal readability.
- Works in all major desktop and mobile browsers, including IE 6 and up.
- Uses requestAnimationFrame for the best possible performance.
- Free to use in both commercial and non-commercial projects.
- Doesn’t require external JavaScript libraries.
- Supports "px", "em" and "rem" CSS units.
- Weighs only 1.17Kb minified and Gzip’ed.
- Supports multiple instances.
- There’s a demo here, try resizing your browser window.
Following the steps below you should be able to get everything up and running.
- Link files:
<script src="moltenleading.js"></script>- Hook up the plugin:
<!-- Put this right before the </body> closing tag -->
<script>
moltenLeading("h1");
</script>- Customizable options:
moltenLeading("h1", {
minline: 1.2, // Integer: Minimum line-height for the element (multiplied by the element's font-size)
maxline: 1.8, // Integer: Maximum line-height for the element (multiplied by the element's font-size)
minwidth: 320, // Integer: Minimum element width where the adjustment starts
maxwidth: 768, // Integer: Maximum element width where the adjustment stops
units: "px" // String: CSS units used for the min & max widths, can be "px", "em" or "rem"
});There’s currently one public method, refresh(). Refresh allows you to manually call Molten Leading’s update methods that calculate and update the line-height of specified element(s). Example of the usage:
var myLeading = moltenLeading("h1", {
minline: 1.2,
maxline: 1.8
});
// Then somewhere later on:
myLeading.refresh();- Tested to be working all the way down to IE6. side note: if you need to support IE6 & 7 you’re gonna have to use simple "tag selectors," since the plugin uses getElementsByTagName as a fallback if querySelector isn’t supported.
- Built progressive enhancement in mind, so the plugin will silently fail when a browser doesn’t support certain selector (only IE6 & 7).
- When using
emunits, keep in mind that ems are relative to the currently specified font-size of the parent element, so the width might not always be what you think it is. - The
remunits are relative to the<html>element’s font-size instead, so they are a bit easier to grasp. - Full credits go to both Wilto who wrote the orinal plugin and to Tim Brown for the original idea.
- Don’t use CSS
transition: allinside Molten Leading enabled containers, will make window.resize performance slower.
- Clone this repo by running
git clone git@github.com:arielsalminen/Molten-Leading.git - If you’re using Mac OS X, open the "Molten-Leading" folder and run
python -m SimpleHTTPServer 8000 - Done! Now view the project at http://localhost:8000
- iOS 4.2.1+
- Android 2.3+
- Windows Phone 7.5+
- Blackberry 7.0+
- Blackberry Tablet 2.0+
- Jolla
- Firefox Phone
- Kindle 3.3+
- Symbian Belle
- Symbian S40 Asha
- webOS 2.0+
- Windows XP
- Windows 7
- Mac OS X
1.20 (2014-07-09) - Adds support for px, em and rem units in addition to performance optimization.
1.10 (2014-06-26) - Performance improvements. Handles debouncing of events now via requestAnimationFrame, which removes the need for the previous threshold setting. Adds also public methods.
1.03 (2014-06-24) - Fixes debouncing of events and optimizes performance (adds also an option to control the debounce timing).
1.02 (2014-06-21) - Adds minified version.
1.01 (2014-06-21) - Removes unnecessary code.
1.00 (2014-06-19) - First release.