Dashboard Temp Share Shortlinks Frames API

HTMLify

index.html
Views: 377 | Author: cody 
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
<!DOCTYPE html>
<html>

<head>
    <meta charset='utf-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <title>Colorful Fireworks on Canvas</title>
    <meta name='viewport' content='width=device-width, initial-scale=1'>
    <link rel='stylesheet' type='text/css' media='screen' href='style.css'>
</head>

<body>

    <canvas id="fireworksCanvas"></canvas>

    <script>
        const canvas = document.getElementById("fireworksCanvas");
        const ctx = canvas.getContext("2d");

        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;

        function resizeCanvas() {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
        }

        window.addEventListener("resize", resizeCanvas, false);

        class Firework {
            constructor() {
                this.x = Math.random() * canvas.width;
                this.y = canvas.height;
                this.sx = Math.random() * 3 - 1.5;
                this.sy = Math.random() * -3 - 3;
                this.size = Math.random() * 2 + 1;
                this.shouldExplode = false;

                const colorVal = Math.round(0xffffff * Math.random());
                const r = colorVal >> 16;
                const g = (colorVal >> 8) & 255;
                const b = colorVal & 255;
                this.r = r;
                this.g = g;
                this.b = b;
            }

            update() {
                if (
                    this.sy >= -2 ||
                    this.y <= 100 ||
                    this.x <= 0 ||
                    this.x >= canvas.width
                ) {
                    this.shouldExplode = true;
                } else {
                    this.sy += 0.01;
                }
                this.x += this.sx;
                this.y += this.sy;
            }

            draw() {
                ctx.fillStyle = `rgb(${this.r},${this.g},${this.b})`;
                ctx.beginPath();
                ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2);
                ctx.fill();
            }
        }

        class Particle {
            constructor(x, y, r, g, b) {
                this.x = x;
                this.y = y;
                this.sx = Math.random() * 3 - 1.5;
                this.sy = Math.random() * 3 - 1.5;
                this.size = Math.random() * 2 + 1;
                this.life = 100;
                this.r = r;
                this.g = g;
                this.b = b;
            }

            update() {
                this.x += this.sx;
                this.y += this.sy;
                this.life -= 1;
            }

            draw() {
                ctx.fillStyle = `rgba(${this.r}, ${this.g}, ${this.b}, ${this.life / 100})`;
                ctx.beginPath();
                ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2);
                ctx.fill();
            }
        }

        const fireworks = [new Firework()];
        const particles = [];

        function animate() {
            ctx.fillStyle = "rgba(0, 0, 0, 0.2)";
            ctx.fillRect(0, 0, canvas.width, canvas.height);

            if (Math.random() < 0.05) {
                fireworks.push(new Firework());
            }

            for (let i = fireworks.length - 1; i >= 0; i--) {
                fireworks[i].update();
                fireworks[i].draw();

                if (fireworks[i].shouldExplode) {
                    for (let j = 0; j < 50; j++) {
                        particles.push(
                            new Particle(
                                fireworks[i].x,
                                fireworks[i].y,
                                fireworks[i].r,
                                fireworks[i].g,
                                fireworks[i].b
                            )
                        );
                    }
                    fireworks.splice(i, 1);
                }
            }

            for (let i = particles.length - 1; i >= 0; i--) {
                particles[i].update();
                particles[i].draw();

                if (particles[i].life <= 0) {
                    particles.splice(i, 1);
                }
            }
            requestAnimationFrame(animate);
        }

        animate();
    </script>
</body>

</html>

Share this file: