<svg class="liquid-button"></svg>
<svg class="liquid-button"
data-width="50"
data-height="50"
data-text="✖"
></svg>
<svg class="liquid-button"
data-color1="#cb60b3"
data-color2="#c146a1"
data-color3="#db36a4"
data-text="colored"
></svg>
<svg class="liquid-button"
data-color1="#ccc"
data-color2="#000"
data-color3="#232425"
data-text="black & white"
></svg>
<svg class="liquid-button"
data-text="different viscosity"
data-force-factor="0.1"
data-layer-1-viscosity="0.5"
data-layer-2-viscosity="0.4"
data-layer-1-mouse-force="400"
data-layer-2-mouse-force="500"
data-layer-1-force-limit="1"
data-layer-2-force-limit="2"
></svg>
<svg class="liquid-button"
data-text="hover"
data-hover-factor="-10"
></svg>
body, html {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
user-select: none;
}
.liquid-button path {
cursor: pointer;
}var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) {if (window.CP.shouldStopExecution(1)){break;} var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); }
window.CP.exitedLoop(1);
} return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var LiquidButton = function () {
function LiquidButton(svg) {
_classCallCheck(this, LiquidButton);
var options = svg.dataset;
this.id = this.constructor.id || (this.constructor.id = 1);
this.constructor.id++;
this.xmlns = 'http://www.w3.org/2000/svg';
this.tension = options.tension * 1 || 0.4;
this.width = options.width * 1 || 200;
this.height = options.height * 1 || 50;
this.margin = options.margin || 50;
this.hoverFactor = options.hoverFactor || -0.1;
this.gap = options.gap || 5;
this.debug = options.debug || false;
this.forceFactor = options.forceFactor || 0.2;
this.color1 = options.color1 || '#36DFE7';
this.color2 = options.color2 || '#8F17E1';
this.color3 = options.color3 || '#BF09E6';
this.textColor = options.textColor || '#FFFFFF';
this.text = options.text || '▶';
this.svg = svg;
this.layers = [{
points: [],
viscosity: 0.5,
mouseForce: 100,
forceLimit: 2
}, {
points: [],
viscosity: 0.8,
mouseForce: 150,
forceLimit: 3
}];
for (var layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {if (window.CP.shouldStopExecution(2)){break;}
var layer = this.layers[layerIndex];
layer.viscosity = options['layer-' + (layerIndex + 1) + 'Viscosity'] * 1 || layer.viscosity;
layer.mouseForce = options['layer-' + (layerIndex + 1) + 'MouseForce'] * 1 || layer.mouseForce;
layer.forceLimit = options['layer-' + (layerIndex + 1) + 'ForceLimit'] * 1 || layer.forceLimit;
layer.path = document.createElementNS(this.xmlns, 'path');
this.svg.appendChild(layer.path);
}
window.CP.exitedLoop(2);
this.wrapperElement = options.wrapperElement || document.body;
if (!this.svg.parentElement) {
this.wrapperElement.append(this.svg);
}
this.svgText = document.createElementNS(this.xmlns, 'text');
this.svgText.setAttribute('x', '50%');
this.svgText.setAttribute('y', '50%');
this.svgText.setAttribute('dy', ~~(this.height / 8) + 'px');
this.svgText.setAttribute('font-size', ~~(this.height / 3));
this.svgText.style.fontFamily = 'sans-serif';
this.svgText.setAttribute('text-anchor', 'middle');
this.svgText.setAttribute('pointer-events', 'none');
this.svg.appendChild(this.svgText);
this.svgDefs = document.createElementNS(this.xmlns, 'defs');
this.svg.appendChild(this.svgDefs);
this.touches = [];
this.noise = options.noise || 0;
document.body.addEventListener('touchstart', this.touchHandler);
document.body.addEventListener('touchmove', this.touchHandler);
document.body.addEventListener('touchend', this.clearHandler);
document.body.addEventListener('touchcancel', this.clearHandler);
this.svg.addEventListener('mousemove', this.mouseHandler);
this.svg.addEventListener('mouseout', this.clearHandler);
this.initOrigins();
this.animate();
}
_createClass(LiquidButton, [{
key: 'distance',
value: function distance(p1, p2) {
return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2));
}
}, {
key: 'update',
value: function update() {
for (var layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {if (window.CP.shouldStopExecution(6)){break;}
var layer = this.layers[layerIndex];
var points = layer.points;
for (var pointIndex = 0; pointIndex < points.length; pointIndex++) {if (window.CP.shouldStopExecution(4)){break;}
var point = points[pointIndex];
var dx = point.ox - point.x + (Math.random() - 0.5) * this.noise;
var dy = point.oy - point.y + (Math.random() - 0.5) * this.noise;
var d = Math.sqrt(dx * dx + dy * dy);
var f = d * this.forceFactor;
point.vx += f * (dx / d || 0);
point.vy += f * (dy / d || 0);
for (var touchIndex = 0; touchIndex < this.touches.length; touchIndex++) {if (window.CP.shouldStopExecution(3)){break;}
var touch = this.touches[touchIndex];
var mouseForce = layer.mouseForce;
if (touch.x > this.margin && touch.x < this.margin + this.width && touch.y > this.margin && touch.y < this.margin + this.height) {
mouseForce *= -this.hoverFactor;
}
var mx = point.x - touch.x;
var my = point.y - touch.y;
var md = Math.sqrt(mx * mx + my * my);
var mf = Math.max(-layer.forceLimit, Math.min(layer.forceLimit, mouseForce * touch.force / md));
point.vx += mf * (mx / md || 0);
point.vy += mf * (my / md || 0);
}
window.CP.exitedLoop(3);
point.vx *= layer.viscosity;
point.vy *= layer.viscosity;
point.x += point.vx;
point.y += point.vy;
}
window.CP.exitedLoop(4);
for (var _pointIndex = 0; _pointIndex < points.length; _pointIndex++) {if (window.CP.shouldStopExecution(5)){break;}
var prev = points[(_pointIndex + points.length - 1) % points.length];
var _point = points[_pointIndex];
var next = points[(_pointIndex + points.length + 1) % points.length];
var dPrev = this.distance(_point, prev);
var dNext = this.distance(_point, next);
var line = {
x: next.x - prev.x,
y: next.y - prev.y
};
var dLine = Math.sqrt(line.x * line.x + line.y * line.y);
_point.cPrev = {
x: _point.x - line.x / dLine * dPrev * this.tension,
y: _point.y - line.y / dLine * dPrev * this.tension
};
_point.cNext = {
x: _point.x + line.x / dLine * dNext * this.tension,
y: _point.y + line.y / dLine * dNext * this.tension
};
}
window.CP.exitedLoop(5);
}
window.CP.exitedLoop(6);
}
}, {
key: 'animate',
value: function animate() {
var _this = this;
this.raf(function () {
_this.update();
_this.draw();
_this.animate();
});
}
}, {
key: 'draw',
value: function draw() {
for (var layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {if (window.CP.shouldStopExecution(10)){break;}
var layer = this.layers[layerIndex];
if (layerIndex === 1) {
if (this.touches.length > 0) {
while (this.svgDefs.firstChild) {if (window.CP.shouldStopExecution(7)){break;}
this.svgDefs.removeChild(this.svgDefs.firstChild);
}
window.CP.exitedLoop(7);
for (var touchIndex = 0; touchIndex < this.touches.length; touchIndex++) {if (window.CP.shouldStopExecution(8)){break;}
var touch = this.touches[touchIndex];
var gradient = document.createElementNS(this.xmlns, 'radialGradient');
gradient.id = 'liquid-gradient-' + this.id + '-' + touchIndex;
var start = document.createElementNS(this.xmlns, 'stop');
start.setAttribute('stop-color', this.color3);
start.setAttribute('offset', '0%');
var stop = document.createElementNS(this.xmlns, 'stop');
stop.setAttribute('stop-color', this.color2);
stop.setAttribute('offset', '100%');
gradient.appendChild(start);
gradient.appendChild(stop);
this.svgDefs.appendChild(gradient);
gradient.setAttribute('cx', touch.x / this.svgWidth);
gradient.setAttribute('cy', touch.y / this.svgHeight);
gradient.setAttribute('r', touch.force);
layer.path.style.fill = 'url(#' + gradient.id + ')';
}
window.CP.exitedLoop(8);
} else {
layer.path.style.fill = this.color2;
}
} else {
layer.path.style.fill = this.color1;
}
var points = layer.points;
var commands = [];
commands.push('M', points[0].x, points[0].y);
for (var pointIndex = 1; pointIndex < points.length; pointIndex += 1) {if (window.CP.shouldStopExecution(9)){break;}
commands.push('C', points[(pointIndex + 0) % points.length].cNext.x, points[(pointIndex + 0) % points.length].cNext.y, points[(pointIndex + 1) % points.length].cPrev.x, points[(pointIndex + 1) % points.length].cPrev.y, points[(pointIndex + 1) % points.length].x, points[(pointIndex + 1) % points.length].y);
}
window.CP.exitedLoop(9);
commands.push('Z');
layer.path.setAttribute('d', commands.join(' '));
}
window.CP.exitedLoop(10);
this.svgText.textContent = this.text;
this.svgText.style.fill = this.textColor;
}
}, {
key: 'createPoint',
value: function createPoint(x, y) {
return {
x: x,
y: y,
ox: x,
oy: y,
vx: 0,
vy: 0
};
}
}, {
key: 'initOrigins',
value: function initOrigins() {
this.svg.setAttribute('width', this.svgWidth);
this.svg.setAttribute('height', this.svgHeight);
for (var layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {if (window.CP.shouldStopExecution(15)){break;}
var layer = this.layers[layerIndex];
var points = [];
for (var x = ~~(this.height / 2); x < this.width - ~~(this.height / 2); x += this.gap) {if (window.CP.shouldStopExecution(11)){break;}
points.push(this.createPoint(x + this.margin, this.margin));
}
window.CP.exitedLoop(11);
for (var alpha = ~~(this.height * 1.25); alpha >= 0; alpha -= this.gap) {if (window.CP.shouldStopExecution(12)){break;}
var angle = Math.PI / ~~(this.height * 1.25) * alpha;
points.push(this.createPoint(Math.sin(angle) * this.height / 2 + this.margin + this.width - this.height / 2, Math.cos(angle) * this.height / 2 + this.margin + this.height / 2));
}
window.CP.exitedLoop(12);
for (var _x = this.width - ~~(this.height / 2) - 1; _x >= ~~(this.height / 2); _x -= this.gap) {if (window.CP.shouldStopExecution(13)){break;}
points.push(this.createPoint(_x + this.margin, this.margin + this.height));
}
window.CP.exitedLoop(13);
for (var _alpha = 0; _alpha <= ~~(this.height * 1.25); _alpha += this.gap) {if (window.CP.shouldStopExecution(14)){break;}
var _angle = Math.PI / ~~(this.height * 1.25) * _alpha;
points.push(this.createPoint(this.height - Math.sin(_angle) * this.height / 2 + this.margin - this.height / 2, Math.cos(_angle) * this.height / 2 + this.margin + this.height / 2));
}
window.CP.exitedLoop(14);
layer.points = points;
}
window.CP.exitedLoop(15);
}
}, {
key: 'mouseHandler',
get: function get() {
var _this2 = this;
return function (e) {
_this2.touches = [{
x: e.offsetX,
y: e.offsetY,
force: 1
}];
};
}
}, {
key: 'touchHandler',
get: function get() {
var _this3 = this;
return function (e) {
_this3.touches = [];
var rect = _this3.svg.getBoundingClientRect();
for (var touchIndex = 0; touchIndex < e.changedTouches.length; touchIndex++) {if (window.CP.shouldStopExecution(16)){break;}
var touch = e.changedTouches[touchIndex];
var x = touch.pageX - rect.left;
var y = touch.pageY - rect.top;
if (x > 0 && y > 0 && x < _this3.svgWidth && y < _this3.svgHeight) {
_this3.touches.push({ x: x, y: y, force: touch.force || 1 });
}
}
window.CP.exitedLoop(16);
e.preventDefault();
};
}
}, {
key: 'clearHandler',
get: function get() {
var _this4 = this;
return function (e) {
_this4.touches = [];
};
}
}, {
key: 'raf',
get: function get() {
return this.__raf || (this.__raf = (window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function (callback) {
setTimeout(callback, 10);
}).bind(window));
}
}, {
key: 'svgWidth',
get: function get() {
return this.width + this.margin * 2;
}
}, {
key: 'svgHeight',
get: function get() {
return this.height + this.margin * 2;
}
}]);
return LiquidButton;
}();
var redraw = function redraw() {
button.initOrigins();
};
var buttons = document.getElementsByClassName('liquid-button');
for (var buttonIndex = 0; buttonIndex < buttons.length; buttonIndex++) {if (window.CP.shouldStopExecution(17)){break;}
var _button = buttons[buttonIndex];
_button.liquidButton = new LiquidButton(_button);
}
window.CP.exitedLoop(17);
External CSS
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External JavaScript
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