JS1k: The JavaScript code golfing competition

M=Math,I=28,u=255;class D{constructor(d,e){this.r=d,this.i=e}a(d){return new D(this.r+d.r,this.i+d.i)}m(d){var e=this;return new D(e.r*d.r-e.i*d.i,e.r*d.i+d.i*e.r)}f(){var d=this;return M.sqrt(d.r*d.r+d.i*d.i)}}a.width=w=520,a.height=h=w*(innerHeight/innerWidth),cd=c.getImageData(0,0,w,h),E=0,l=.03,H=1,W=.5-M.random(),L=.5-M.random(),setInterval(()=>{E+=l,n=new D(1.2*M.cos(E)-.6+W,.6*M.sin(E)+L),(()=>{for(x=0;x<w;++x)for(o=0;o<h;++o){for(var d=(x-3*(w/6))/(w/6),e=(o-1.5*(h/3))/(h/3),f=new D(d,e),g=0;2>=f.f()&&g<I;)f=f.m(f).a(n),++g;if(g==I)var i=I;else var i=g+1-M.log2(M.log(f.f()));c2=Y(i/10,1,i<I?.65:0),ix=4*(x+o*w),ct=cd.data,ct[ix]=c2[0],ct[ix+1]=c2[1],ct[ix+2]=c2[2],ct[ix+3]=u}c.putImageData(cd,0,0)})()}),b.addEventListener("wheel",d=>{wh=d.wheelDelta,l-=0>(wh?wh:-d.deltaY)?.005:-.005}),Y=(d,e,f)=>{d%=1;var g=(d,e,f)=>(a=e-d,f%=1,f<1/6?d+6*a*f:.5>f?e:f<2/3?d+6*(a*(2/3-f)):d);return q=.5>f?f*(1+e):f+e-f*e,p=2*f-q,[~~(g(p,q,d+1/3)*u),~~(g(p,q,d)*u),~~(g(p,q,d-1/3)*u)]};

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

M=Math;
I=28;
u=255;
class C
{
    constructor(r,i)
    {
        this.r = r;
        this.i = i;
    }
    a(n)
    {
        return new C(this.r + n.r, this.i + n.i);
    }
    m(n)
    {
        var t = this;
        return new C((t.r * n.r) - (t.i * n.i), (t.r * n.i) + (n.i * t.r));
    }
    f()
    {
        var t = this;
        return M.sqrt(t.r*t.r + t.i*t.i)
    }
}
a.width = w = 520;
a.height = h = w*(innerHeight/innerWidth);
cd=c.getImageData(0,0,w,h);


N=0;
S=.03;
P = 1;
W=.5-M.random();
L=.5-M.random();
setInterval(()=>{
    N+=S;
    Z=new C(M.cos(N)*1.2-.6+W,M.sin(N)*.6+L);
(()=>{
    for(x=0;x<w;++x)for(y=0;y<h;++y){
    var X=(x-((w/6)*3))/(w/6);
    var Y=(y-((h/3)*1.5))/(h/3);
    var z=new C(X,Y);
    var n=0;
    while(z.f() <= 2 && n < I)
    {
        z = (z.m(z)).a(Z);
        ++n;
    }
    if(n==I)var j=I;
    else var j=n + 1 - M.log2(M.log(z.f()));
    c2=Q(((j / 10)),1,(j < I ? .65 : 0));
    ix = (x+y*w)*4;
    ct = cd.data;
    ct[ix] = c2[0];
    ct[ix+1] = c2[1];
    ct[ix+2] = c2[2];
    ct[ix+3] = u;}
    c.putImageData(cd,0,0);
})();
});
b.addEventListener('wheel',e=>{
    wh = e.wheelDelta;
    S -= (wh ? wh : -e.deltaY)<0 ? .005 : -.005;
});

Q=(h, s, l)=>{
        h=h%1;
        var Q2 = (p, q, t)=>{
            a=(q - p), t=t%1;
            return t<1/6 ? p+a*6*t : (t<.5 ? q : (t<2/3 ? p+a*(2/3-t)*6 : p));
        };
        q = l < 0.5 ? l * (1 + s) : l + s - l * s,p = 2 * l - q;
    return [~~(Q2(p, q, h + 1/3) * u), ~~(Q2(p, q, h) * u), ~~(Q2(p, q, h - 1/3) * u)];
};