Leverage Vertical Scroll Direction with CSS
ScrollDir ⬆ ⬇
ScrollDir, short for Scroll Direction, is a 0 dependency, ~1kb micro Javascript plugin to easily leverage vertical scroll direction in CSS via a data attribute.
ScrollDir is perfect for:
- showing or hiding sticky elements based on scroll direction
🐥 - only changing its direction attribute when scrolled a significant amount
🔥 -
ignoring small scroll movements that cause unwanted jitters
😎
Usage
ScrollDir will set the data-scrolldir attribute on the <html> element to up or down:
<html data-scrolldir="up"></html>or
<html data-scrolldir="down"></html>Now it’s easy to change styles based on the direction the user is scrolling!
[data-scrolldir="down"] .my-fixed-header {
display: none;
}In Action 🎥
Install 📦
npm
npm install scrolldir --savebower
bower install scrolldir --saveyarn
yarn add scrolldirSetup 📤
Easy Mode
Add dist/scrolldir.auto.min.js and you’re done. There is nothing more to do! Scrolldir will just work.
Now go write some styles using [data-scrolldir="down"] and [data-scrolldir="up"].
Custom Mode 🛠
Add dist/scrolldir.min.js. You have access to the API options below and must invoke scrollDir.
scrollDir();To use an attribute besides data-scrolldir:
scrollDir({ attribute: "new-attribute-name" });To add the Scrolldir attribute to a different element:
scrollDir({ el: "your-new-selector" });To turn Scrolldir off:
scrollDir({ off: true });To turn provide a different scroll direction on page load (or app start):
scrollDir({ dir: "up" }); // the default is 'down'To change the thresholdPixels—the number of pixels to scroll before re-evaluating the direction:
scrollDir({ thresholdPixels: someNumber }); // the default is 64 pixels
// example: scrollDir({ thresholdPixels: 10 })Example 🌴
- scrolldir on codepen.
This is a modular version of pwfisher's scroll-intent. If you'd like to use scrolldir with jQuery—use Scroll Intent. Scrolldir should work easily within any front-end framework so it ditches library dependencies. ~TY!