Neon Cursor Effect

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// @ts-nocheck
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import { useEffect } from 'react';
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const useCanvasCursor = () => {
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  function n(e) {
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    this.init(e || {});
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  }
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  n.prototype = {
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    init: function (e) {
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      this.phase = e.phase || 0;
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      this.offset = e.offset || 0;
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      this.frequency = e.frequency || 0.001;
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      this.amplitude = e.amplitude || 1;
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    },
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    update: function () {
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      return (
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        (this.phase += this.frequency),
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        (e = this.offset + Math.sin(this.phase) * this.amplitude)
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      );
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    },
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    value: function () {
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      return e;
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    },
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  };
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  function Line(e) {
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    this.init(e || {});
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  }
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  Line.prototype = {
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    init: function (e) {
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      this.spring = e.spring + 0.1 * Math.random() - 0.02;
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      this.friction = E.friction + 0.01 * Math.random() - 0.002;
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      this.nodes = [];
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      for (var t, n = 0; n < E.size; n++) {
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        t = new Node();
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        t.x = pos.x;
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        t.y = pos.y;
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        this.nodes.push(t);
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      }
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    },
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    update: function () {
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      var e = this.spring,
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        t = this.nodes[0];
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      t.vx += (pos.x - t.x) * e;
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      t.vy += (pos.y - t.y) * e;
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      for (var n, i = 0, a = this.nodes.length; i < a; i++)
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        (t = this.nodes[i]),
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          0 < i &&
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            ((n = this.nodes[i - 1]),
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            (t.vx += (n.x - t.x) * e),
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            (t.vy += (n.y - t.y) * e),
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            (t.vx += n.vx * E.dampening),
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            (t.vy += n.vy * E.dampening)),
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          (t.vx *= this.friction),
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          (t.vy *= this.friction),
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          (t.x += t.vx),
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          (t.y += t.vy),
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          (e *= E.tension);
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    },
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    draw: function () {
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      var e,
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        t,
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        n = this.nodes[0].x,
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        i = this.nodes[0].y;
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      ctx.beginPath();
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      ctx.moveTo(n, i);
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      for (var a = 1, o = this.nodes.length - 2; a < o; a++) {
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        e = this.nodes[a];
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        t = this.nodes[a + 1];
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        n = 0.5 * (e.x + t.x);
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        i = 0.5 * (e.y + t.y);
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        ctx.quadraticCurveTo(e.x, e.y, n, i);
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      }
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      e = this.nodes[a];
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      t = this.nodes[a + 1];
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      ctx.quadraticCurveTo(e.x, e.y, t.x, t.y);
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      ctx.stroke();
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      ctx.closePath();
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    },
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  };
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  function onMousemove(e) {
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    function o() {
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      lines = [];
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      for (var e = 0; e < E.trails; e++)
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        lines.push(new Line({ spring: 0.4 + (e / E.trails) * 0.025 }));
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    }
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    function c(e) {
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      e.touches
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        ? ((pos.x = e.touches[0].pageX), (pos.y = e.touches[0].pageY))
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        : ((pos.x = e.clientX), (pos.y = e.clientY)),
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        e.preventDefault();
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    }
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    function l(e) {
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      1 == e.touches.length &&
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        ((pos.x = e.touches[0].pageX), (pos.y = e.touches[0].pageY));
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    }
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    document.removeEventListener('mousemove', onMousemove),
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      document.removeEventListener('touchstart', onMousemove),
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      document.addEventListener('mousemove', c),
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      document.addEventListener('touchmove', c),
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      document.addEventListener('touchstart', l),
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      c(e),
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      o(),
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      render();
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  }
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  function render() {
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    if (ctx.running) {
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      ctx.globalCompositeOperation = 'source-over';
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      ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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      ctx.globalCompositeOperation = 'lighter';
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      ctx.strokeStyle = 'hsla(' + Math.round(f.update()) + ',50%,50%,0.2)';
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      ctx.lineWidth = 1;
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      for (var e, t = 0; t < E.trails; t++) {
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        (e = lines[t]).update();
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        e.draw();
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      }
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      ctx.frame++;
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      window.requestAnimationFrame(render);
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    }
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  }
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  function resizeCanvas() {
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    ctx.canvas.width = window.innerWidth - 20;
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    ctx.canvas.height = window.innerHeight;
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  }
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  var ctx,
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    f,
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    e = 0,
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    pos = {},
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    lines = [],
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    E = {
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      debug: true,
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      friction: 0.5,
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      trails: 20,
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      size: 50,
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      dampening: 0.25,
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      tension: 0.98,
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    };
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  function Node() {
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    this.x = 0;
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    this.y = 0;
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    this.vy = 0;
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    this.vx = 0;
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  }
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  const renderCanvas = function () {
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    ctx = document.getElementById('canvas').getContext('2d');
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    ctx.running = true;
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    ctx.frame = 1;
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    f = new n({
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      phase: Math.random() * 2 * Math.PI,
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      amplitude: 85,
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      frequency: 0.0015,
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      offset: 285,
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    });
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    document.addEventListener('mousemove', onMousemove);
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    document.addEventListener('touchstart', onMousemove);
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    document.body.addEventListener('orientationchange', resizeCanvas);
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    window.addEventListener('resize', resizeCanvas);
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    window.addEventListener('focus', () => {
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      if (!ctx.running) {
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        ctx.running = true;
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        render();
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      }
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    });
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    window.addEventListener('blur', () => {
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      ctx.running = true;
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    });
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    resizeCanvas();
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  };
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  useEffect(() => {
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    renderCanvas();
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    return () => {
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      ctx.running = false;
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      document.removeEventListener('mousemove', onMousemove);
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      document.removeEventListener('touchstart', onMousemove);
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      document.body.removeEventListener('orientationchange', resizeCanvas);
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      window.removeEventListener('resize', resizeCanvas);
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      window.removeEventListener('focus', () => {
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        if (!ctx.running) {
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          ctx.running = true;
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          render();
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        }
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      });
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      window.removeEventListener('blur', () => {
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        ctx.running = true;
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      });
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    };
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  }, []);
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};
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export default useCanvasCursor;