const img = new Image(); // Create new img element
img.src =
"data:image/svg+xml,%3C%3Fxml version='1.0' standalone='no'%3F%3E%3C!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 20010904//EN' 'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd'%3E%3Csvg version='1.0' xmlns='http://www.w3.org/2000/svg' width='1114.000000pt' height='1280.000000pt' viewBox='0 0 1114.000000 1280.000000' preserveAspectRatio='xMidYMid meet'%3E%3Cmetadata%3E%0ACreated by potrace 1.15, written by Peter Selinger 2001-2017%0A%3C/metadata%3E%3Cg transform='translate(0.000000,1280.000000) scale(0.100000,-0.100000)'%0Afill='%23000000' stroke='none'%3E%3Cpath d='M7220 12790 c0 -64 246 -623 668 -1520 316 -671 320 -680 335 -680 9%0A0 12 -9 9 -30 -2 -17 1 -49 6 -73 10 -38 -5 -123 -157 -882 -101 -506 -173%0A-841 -180 -843 -23 -8 -72 -55 -87 -84 -8 -16 -21 -60 -28 -96 -12 -64 -30%0A-92 -400 -647 -214 -319 -385 -569 -382 -555 79 362 74 833 -15 1185 -168 667%0A-558 1109 -1016 1154 -236 23 -472 -65 -681 -254 -383 -348 -612 -1069 -551%0A-1735 27 -307 111 -625 219 -839 l31 -63 -33 7 c-18 4 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function easeInExpo(x) {
return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
}
class TextDesintegrator {
constructor(el, form, options) {
const defaultOptions = {
padding: 150,
density: 5,
duration: 6000 // in ms
};
this.form = form;
this.step = 0;
this.data = [];
this.scale = 2; // pixel density
this.el = el;
this.el.style.position = "relative";
this.inner = this.el.querySelector("span");
this.options = { ...defaultOptions, ...options };
this.createCanvas();
this.form.addEventListener("submit", (e) => {
e.preventDefault();
this.fillCanvas();
this.start();
this.form.classList.add("submitted");
});
}
createCanvas() {
// get the width and the height of the element
// canvas will have the same dimensions
const { width, height } = this.el.getBoundingClientRect();
this.height = height;
this.width = width;
this.canvas = document.createElement("canvas");
this.canvas.width = this.scale * (this.width + 2 * this.options.padding);
this.canvas.height = this.scale * (this.height + 2 * this.options.padding);
this.canvas.style.width = `${this.width + 2 * this.options.padding}px`;
this.canvas.style.height = `${this.height + 2 * this.options.padding}px`;
this.canvas.style.transform = `translate3d(${-this.options
.padding}px, ${-this.options.padding}px, 0)`;
this.context = this.canvas.getContext("2d");
this.context.scale(this.scale, this.scale);
this.el.after(this.canvas);
}
clearContext() {
this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
}
fillCanvas() {
const style = getComputedStyle(this.el);
this.color = "rgb(0, 0, 0)";
this.context.fillStyle = this.color;
this.context.globalAlpha = 1;
this.context.font = style.getPropertyValue("font");
this.context.textBaseline = "ideographic";
this.clearContext();
this.context.fillText(
this.el.value,
this.options.padding,
(this.canvas.height / this.scale + this.height) / 2 - 10
);
}
start() {
this.t0 = 0;
this.fillCanvas();
this.pixelize();
this.render();
}
pixelize() {
this.data = [];
const { padding, density, duration } = this.options;
for (
let y = 0;
y < this.canvas.height + 2 * padding - Math.floor(density / 2);
y += density
) {
for (
let x = 0;
x < this.canvas.width + 2 * padding - Math.floor(density / 2);
x += density
) {
const { data } = this.context.getImageData(
x + Math.floor(density / 4),
y + Math.floor(density / 4),
1,
1
);
const [, , , a] = data;
if (a > 0) {
this.data.push({
alpha: a / 255,
longevity: Math.min(
duration * 0.25 + Math.random() * duration * 0.75,
duration - 100
),
x,
y,
initialX: x,
initialY: y,
finalX: x + 2 * (Math.random() - 0.5) * this.canvas.width,
finalY: y + 2 * (Math.random() - 0.5) * this.canvas.width
});
}
}
}
}
render(timestamp = 0) {
if (!this.t0) {
this.t0 = timestamp;
}
const elapsed = timestamp - this.t0;
this.step = elapsed;
this.updateData();
this.clearContext();
for (const sq of this.data) {
this.context.globalAlpha = sq.alpha;
this.context.fillStyle = this.color;
this.context.drawImage(
img,
sq.x / 2 + (sq.x / 2) * 0.05 * (Math.random() - 0.5),
sq.y / 2 -
this.options.density +
(sq.y / 2) * 0.05 * (Math.random() - 0.5),
this.options.density * 2 * (1 + (3 * elapsed) / this.options.duration),
0.5 *
this.options.density *
2 *
(1 + (3 * elapsed) / this.options.duration)
);
}
this.canvas.style.transformOrigin = "100px 100px";
this.canvas.style.filter = `blur(${
1 * easeInExpo(elapsed / this.options.duration)
}px)`;
this.canvas.style.transform = `translate3d(${-this.options
.padding}px, ${-this.options.padding}px, 0) scale(${
1 + 1 * easeInExpo(elapsed / this.options.duration)
})`;
if (elapsed > this.options.duration) {
this.onComplete();
} else {
requestAnimationFrame((t) => this.render(t));
}
}
onComplete() {
if (this.id) {
window.cancelAnimationFrame(this.id);
}
this.data = [];
this.form.classList.remove("submitted");
this.form.reset();
}
updateData() {
for (const sq of this.data) {
sq.alpha = this.calculateOpacity(sq.longevity, this.step);
sq.x = this.calculatePosition(
sq.initialX,
sq.finalX,
sq.longevity,
this.step
);
sq.y = this.calculatePosition(
sq.initialY,
sq.finalY,
sq.longevity,
this.step
);
}
}
calculatePosition(xS, xE, l, x) {
const expo = (l, x) => {
return x < l ? 1 - Math.pow(2, 15 * (x / l) - 15) : 0;
};
const val = (xS - xE) * expo(l, x) + xE;
return val;
}
calculateOpacity(l, x) {
return x <= l ? 1 - Math.pow(x / l, 3) : 0;
}
}
const form = document.querySelector("#terrible-text");
const target = form.querySelector("input");
const spooky = new TextDesintegrator(target, form);
!
