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cs/script.js

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+var settings = {
+    particles: {
+        length: 500, // maximum amount of particles
+        duration: 2, // particle duration in sec
+        velocity: 100, // particle velocity in pixels/sec
+        effect: -0.6, // play with this for a nice effect
+        size: 28, // particle size in pixels
+    },
+};
+
+(function () {
+    var b = 0; var c = ["ms", "moz", "webkit", "o"]; for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) { window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; window.cancelAnimationFrame = window[c[a] + "CancelAnimationFrame"] || window[c[a] + "CancelRequestAnimationFrame"] } if (!window.requestAnimationFrame) { window.requestAnimationFrame = function (h, e) { var d = new Date().getTime(); var f = Math.max(0, 16 - (d - b)); var g = window.setTimeout(function () { h(d + f) }, f); b = d + f; return g } } if (!window.cancelAnimationFrame) { window.cancelAnimationFrame = function (d) { clearTimeout(d) } }
+}());
+
+/*
+ * Point class
+ */
+var Point = (function () {
+    function Point(x, y) {
+        this.x = (typeof x !== 'undefined') ? x : 0;
+        this.y = (typeof y !== 'undefined') ? y : 0;
+    }
+    Point.prototype.clone = function () {
+        return new Point(this.x, this.y);
+    };
+    Point.prototype.length = function (length) {
+        if (typeof length == 'undefined')
+            return Math.sqrt(this.x * this.x + this.y * this.y);
+        this.normalize();
+        this.x *= length;
+        this.y *= length;
+        return this;
+    };
+    Point.prototype.normalize = function () {
+        var length = this.length();
+        this.x /= length;
+        this.y /= length;
+        return this;
+    };
+    return Point;
+})();
+
+/*
+ * Particle class
+ */
+var Particle = (function () {
+    function Particle() {
+        this.position = new Point();
+        this.velocity = new Point();
+        this.acceleration = new Point();
+        this.age = 0;
+    }
+    Particle.prototype.initialize = function (x, y, dx, dy) {
+        this.position.x = x;
+        this.position.y = y;
+        this.velocity.x = dx;
+        this.velocity.y = dy;
+        this.acceleration.x = dx * settings.particles.effect;
+        this.acceleration.y = dy * settings.particles.effect;
+        this.age = 0;
+    };
+    Particle.prototype.update = function (deltaTime) {
+        this.position.x += this.velocity.x * deltaTime;
+        this.position.y += this.velocity.y * deltaTime;
+        this.velocity.x += this.acceleration.x * deltaTime;
+        this.velocity.y += this.acceleration.y * deltaTime;
+        this.age += deltaTime;
+    };
+    Particle.prototype.draw = function (context, image) {
+        function ease(t) {
+            return (--t) * t * t + 1;
+        }
+        var size = image.width * ease(this.age / settings.particles.duration);
+        context.globalAlpha = 1 - this.age / settings.particles.duration;
+        context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);
+    };
+    return Particle;
+})();
+
+/*
+ * ParticlePool class
+ */
+var ParticlePool = (function () {
+    var particles,
+        firstActive = 0,
+        firstFree = 0,
+        duration = settings.particles.duration;
+
+    function ParticlePool(length) {
+        // create and populate particle pool
+        particles = new Array(length);
+        for (var i = 0; i < particles.length; i++)
+            particles[i] = new Particle();
+    }
+    ParticlePool.prototype.add = function (x, y, dx, dy) {
+        particles[firstFree].initialize(x, y, dx, dy);
+
+        // handle circular queue
+        firstFree++;
+        if (firstFree == particles.length) firstFree = 0;
+        if (firstActive == firstFree) firstActive++;
+        if (firstActive == particles.length) firstActive = 0;
+    };
+    ParticlePool.prototype.update = function (deltaTime) {
+        var i;
+
+        // update active particles
+        if (firstActive < firstFree) {
+            for (i = firstActive; i < firstFree; i++)
+                particles[i].update(deltaTime);
+        }
+        if (firstFree < firstActive) {
+            for (i = firstActive; i < particles.length; i++)
+                particles[i].update(deltaTime);
+            for (i = 0; i < firstFree; i++)
+                particles[i].update(deltaTime);
+        }
+
+        // remove inactive particles
+        while (particles[firstActive].age >= duration && firstActive != firstFree) {
+            firstActive++;
+            if (firstActive == particles.length) firstActive = 0;
+        }
+
+
+    };
+    ParticlePool.prototype.draw = function (context, image) {
+        // draw active particles
+        if (firstActive < firstFree) {
+            for (i = firstActive; i < firstFree; i++)
+                particles[i].draw(context, image);
+        }
+        if (firstFree < firstActive) {
+            for (i = firstActive; i < particles.length; i++)
+                particles[i].draw(context, image);
+            for (i = 0; i < firstFree; i++)
+                particles[i].draw(context, image);
+        }
+    };
+    return ParticlePool;
+})();
+
+/*
+ * Putting it all together
+ */
+(function (canvas) {
+    var context = canvas.getContext('2d'),
+        particles = new ParticlePool(settings.particles.length),
+        particleRate = settings.particles.length / settings.particles.duration, // particles/sec
+        time;
+
+    // get point on heart with -PI <= t <= PI
+    function pointOnHeart(t) {
+        return new Point(
+            160 * Math.pow(Math.sin(t), 3),
+            130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
+        );
+    }
+
+    // creating the particle image using a dummy canvas
+    var image = (function () {
+        var canvas = document.createElement('canvas'),
+            context = canvas.getContext('2d');
+        canvas.width = settings.particles.size;
+        canvas.height = settings.particles.size;
+        // helper function to create the path
+        function to(t) {
+            var point = pointOnHeart(t);
+            point.x = settings.particles.size / 2 + point.x * settings.particles.size / 350;
+            point.y = settings.particles.size / 2 - point.y * settings.particles.size / 350;
+            return point;
+        }
+        // create the path
+        context.beginPath();
+        var t = -Math.PI;
+        var point = to(t);
+        context.moveTo(point.x, point.y);
+        while (t < Math.PI) {
+            t += 0.01; // baby steps!
+            point = to(t);
+            context.lineTo(point.x, point.y);
+        }
+        context.closePath();
+        // create the fill
+        // context.fillStyle = '#c88ffe';
+        context.fillStyle = '#ffc0cb';
+        context.fill();
+        // create the image
+        var image = new Image();
+        image.src = canvas.toDataURL();
+        return image;
+    })();
+
+    // render that thing!
+    function render() {
+        // next animation frame
+        requestAnimationFrame(render);
+
+        // update time
+        var newTime = new Date().getTime() / 1000,
+            deltaTime = newTime - (time || newTime);
+        time = newTime;
+
+        // clear canvas
+        context.clearRect(0, 0, canvas.width, canvas.height);
+
+        // create new particles
+        var amount = particleRate * deltaTime;
+        for (var i = 0; i < amount; i++) {
+            var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
+            var dir = pos.clone().length(settings.particles.velocity);
+            particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);
+        }
+
+        // update and draw particles
+        particles.update(deltaTime);
+        particles.draw(context, image);
+    }
+
+    // handle (re-)sizing of the canvas
+    function onResize() {
+        canvas.width = canvas.clientWidth;
+        canvas.height = canvas.clientHeight;
+    }
+    window.onresize = onResize;
+
+    // delay rendering bootstrap
+    setTimeout(function () {
+        onResize();
+        render();
+    }, 10);
+})(document.getElementById('lovexf'));

cs/style.css

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+* {
+    padding: 0;
+    margin: 0;
+}
+
+body {
+    background: url(https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dec470b0-fed6-46e5-be53-ec85fadc01be/b3997a29-3506-4fa5-9a54-57b967b1990a.webp) no-repeat center center;
+    background-size: cover;
+    height: 100vh;
+}
+
+body::after {
+    content: '';
+    display: block;
+    position: absolute;
+    width: 100%;
+    height: 100vh;
+    -webkit-background-color: rgba(0, 0, 0, .5);
+    background-color: rgba(0, 0, 0, .5);
+}
+
+audio,
+.love_you {
+    position: absolute;
+    left: 50%;
+    top: 1.5rem;
+    -webkit-transform: translateX(-50%);
+    transform: translateX(-50%);
+    z-index: 1809185784;
+}
+
+.love_you {
+    top: 45%;
+    font-family: Georgia, 'Times New Roman', Times, serif;
+    font-size: 1.3rem;
+    font-weight: bold;
+    color: #ffc0cb;
+    letter-spacing: .05rem;
+    -moz-animation: love-xf 1.2s alternate ease-in-out;
+    -webkit-animation: love-xf 1.2s alternate ease-in-out;
+    animation: love-xf 1.2s alternate ease-in-out;
+    user-select: none;
+    -webkit-text-shadow: 0 0 8px #fff;
+    text-shadow: 0 0 8px #fff;
+}
+
+#lovexf {
+    position: absolute;
+    width: 100%;
+    height: 100%;
+    z-index: 520;
+}
+
+@keyframes love-xf {
+    0% {
+        opacity: 0.08;
+        filter: blur(8px);
+        letter-spacing: .1rem;
+    }
+
+    100% {
+        opacity: 1;
+        filter: blur(0);
+        letter-spacing: .05rem;
+    }
+}