Ratchet assists with the process of dissecting CSS3 transform strings into javascript objects that you can then do something more intelligent with.
Displayed below is a simple example. First a html file with a div element styled to look like a square box:
<html>
<body>
<style type="text/css">
#box {
width: 50px;
height: 50px;
background: red;
}
</style>
<div id="box"></div>
<script src="simple-bundle.js"></script>
</body>
</html>And then some JS that can be used to manipulate the transform of the box ( in partnership with the feature module):
const ratchet = require('..');
const transform = require('feature/css')('transform');
const box = document.getElementById('box');
const { width: boxWidth } = box.getBoundingClientRect();
const t = transform && ratchet(transform(box));
if (t) {
let forwards = true;
// this is all a bit hacky, but you get the idea
const animate = () => {
if (forwards) {
t.translate.x.value += 2;
t.rotate.z.value += 5;
forwards = forwards && t.translate.x.value + boxWidth < window.innerWidth;
} else {
t.translate.x.value -= 2;
t.rotate.z.value -= 5;
forwards = t.translate.x.value < 0;
}
transform(box, t.toString());
window.requestAnimationFrame(animate);
};
animate();
}If you want to give this a go you should be able to run the example with
bde simply type yarn example
in the repository once cloned an dependencies have been installed.
Assuming it is working, you will see a square red box, moving and rotating towards the right of the screen.
The MIT License (MIT)
Copyright (c) 2020 Damon Oehlman [email protected]
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