76 lines
2.3 KiB
JavaScript
76 lines
2.3 KiB
JavaScript
const preact = require('preact');
|
|
const { Component } = require('preact');
|
|
const anime = require('animejs').default;
|
|
|
|
class Noise extends Component {
|
|
constructor() {
|
|
super();
|
|
this.animations = [];
|
|
}
|
|
|
|
render() {
|
|
return (
|
|
<svg
|
|
version="1.1"
|
|
id="noise"
|
|
xmlns="http://www.w3.org/2000/svg"
|
|
viewBox="0 0 400 400">
|
|
<filter id='noiseFilter'>
|
|
<feTurbulence type="turbulence" baseFrequency="0.2" numOctaves="2" result="turbulence"></feTurbulence>
|
|
<feDisplacementMap in2="turbulence" in="SourceGraphic" scale="2" xChannelSelector="R" yChannelSelector="G"></feDisplacementMap>
|
|
</filter>
|
|
</svg>
|
|
);
|
|
}
|
|
|
|
componentDidMount() {
|
|
this.animations.push(anime({
|
|
targets: ['#noiseFilter feTurbulence', '#noiseFilter feDisplacementMap'],
|
|
easing: 'linear',
|
|
loop: true,
|
|
keyframes: [
|
|
{
|
|
baseFrequency: 0.5,
|
|
duration: () => anime.random(1000, 2000),
|
|
},
|
|
],
|
|
}));
|
|
|
|
this.animations.push(anime({
|
|
targets: ['#noiseFilter feDisplacementMap'],
|
|
easing: 'linear',
|
|
loop: true,
|
|
keyframes: [
|
|
{
|
|
scale: 2,
|
|
duration: () => anime.random(2000, 5000),
|
|
},
|
|
{
|
|
scale: 4,
|
|
duration: () => anime.random(150, 250),
|
|
},
|
|
{
|
|
scale: 2,
|
|
duration: () => anime.random(100, 150),
|
|
},
|
|
{
|
|
scale: 4,
|
|
duration: () => anime.random(150, 250),
|
|
},
|
|
],
|
|
}));
|
|
}
|
|
|
|
// this is necessary because
|
|
// skipping / timing / unmounting race conditions
|
|
// can cause the animations to cut short, this will ensure the values are reset
|
|
// because preact will recycle all these components
|
|
componentWillUnmount() {
|
|
for (let i = this.animations.length - 1; i >= 0; i--) {
|
|
this.animations[i].reset();
|
|
}
|
|
}
|
|
}
|
|
|
|
module.exports = Noise;
|