JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.
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<svg class="electric-loader" viewBox="0 0 100 100">
<defs>
<filter id="goo">
<feGaussianBlur in="SourceGraphic" stdDeviation="4" result="blur" />
<feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 17 -2.15" result="goo" />
<feComposite in="SourceGraphic" in2="goo" operator="over" />
</filter>
</defs>
<g filter="url(#goo)"></g>
</svg>
.electric-loader {
position: absolute;
top: 0; right: 0; bottom: 0; left: 0;
margin: auto;
width: 80%;
width: 80vw;
height: auto;
max-width: 600px;
}
.electric-loader path {
fill: none;
stroke: #A5F2E7;
stroke-width: 0.6;
stroke-dasharray: 300;
stroke-dashoffset: -300;
animation:
stroke-anim 2s steps(40) infinite,
stroke-color 0.6s steps(10) alternate infinite;
}
@keyframes stroke-anim { to { stroke-dashoffset: 0; } }
@keyframes stroke-color { to { stroke: #49BEB7; } }
html { height: 100%; width: 100%; background: #000; }
console.clear();
var svgns = "http://www.w3.org/2000/svg";
var twoPI = Math.PI * 2;
function ElectricLine(radius = 48, startOffset = 0){
var path = document.createElementNS(svgns, 'path');
var coords = [];
var centerX = 50;
var centerY = 50;
for (var i = 0; i <= twoPI + 0.1; i += 0.1 ){
coords.push(
centerX + ( Math.sin( i + startOffset ) * radius ),
centerY + ( Math.cos( i + startOffset ) * radius )
);
}
// Slightly randomize the points
function updateElectricLine(){
path.setAttribute(
'd',
coords.map((point,i)=>{
return (
i == 0 ? 'M' :
i % 2 == 0 ? 'L' :
','
)
+ Math.round( ( point + Math.random() * 3 ) * 100 ) / 100
}).join(''));
}
path.style.animationDelay = '0s, ' + ( -Math.random() ) + 's';
//path.style.animationDuration = (1.5 + Math.random()) + 's, ' + 0.2 + ( Math.random() * 0.4 ) + 's';
updateElectricLine();
// Have to get it in the dom for `getTotalLength` to work
var tempSVG = document.createElementNS(svgns, 'svg');
tempSVG.appendChild(path);
document.body.appendChild(tempSVG);
// Get the line length
var length = path.getTotalLength();
document.body.removeChild(tempSVG);
// Set an accurate strokeDasharray & offset for the animation
path.style.strokeDasharray = length/2; //( length * 0.48 ) + ' ' + ( length * 0.52 );
path.style.strokeDashoffset = -length;
return {
el: path,
update: updateElectricLine
}
}
var lines = [
new ElectricLine( 35 , Math.PI * 0.0 ),
new ElectricLine( 34.5 , Math.PI * 1.0 ),
new ElectricLine( 34 , Math.PI * 0.25 ),
new ElectricLine( 33.5 , Math.PI * 1.25),
new ElectricLine( 33 , Math.PI * 0.5 ),
new ElectricLine( 32.5 , Math.PI * 1.5 )
];
var svg = document.querySelector('.electric-loader g');
lines.forEach( line => { svg.appendChild(line.el); });
var t = 0;
function update(){
requestAnimationFrame(update);
if ( t % 7 == 0 ) {
lines.forEach( line => { line.update(); })
}
t++;
}
update();
Also see: Tab Triggers