cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <!-- For more examples: https://codepen.io/Zaku/pen/eRmRxz -->

<svg class="liquid-button"
     data-text="BUTTON"
     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"
     data-color1="#4DE7BF"
     data-color2="#0A3FC7"
     data-color3="#2A62F4"></svg>

            
          
!
            
              body, html
  padding: 0
  margin: 0
  width: 100%
  height: 100%
  user-select: none
  display: grid

.liquid-button
  margin: auto
  path
    cursor: pointer
            
          
!
            
              const LiquidButton = class LiquidButton {
  constructor(svg) {
    const 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  ||  40;
    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    || 'Button';
    this.svg = svg;
    this.layers = [{
      points: [],
      viscosity: 0.5,
      mouseForce: 100,
      forceLimit: 2,
    },{
      points: [],
      viscosity: 0.8,
      mouseForce: 150,
      forceLimit: 3,
    }];
    for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
      const 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);
    }
    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();
  }

  get mouseHandler() {
    return (e) => {
      this.touches = [{
        x: e.offsetX,
        y: e.offsetY,
        force: 1,
      }];
    };
  }

  get touchHandler() {
    return (e) => {
      this.touches = [];
      const rect = this.svg.getBoundingClientRect();
      for (let touchIndex = 0; touchIndex < e.changedTouches.length; touchIndex++) {
        const touch = e.changedTouches[touchIndex];
        const x = touch.pageX - rect.left;
        const y = touch.pageY - rect.top;
        if (x > 0 && y > 0 && x < this.svgWidth && y < this.svgHeight) {
          this.touches.push({x, y, force: touch.force || 1});
        }
      }
      e.preventDefault();
    };
  }

  get clearHandler() {
    return (e) => {
      this.touches = [];
    };
  }

  get raf() {
    return this.__raf || (this.__raf = (
      window.requestAnimationFrame ||
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      function(callback){ setTimeout(callback, 10)}
    ).bind(window));
  }

  distance(p1, p2) {
    return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2));
  }

  update() {
    for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
      const layer = this.layers[layerIndex];
      const points = layer.points;
      for (let pointIndex = 0; pointIndex < points.length; pointIndex++) {
        const point = points[pointIndex];
        const dx = point.ox - point.x + (Math.random() - 0.5) * this.noise;
        const dy = point.oy - point.y + (Math.random() - 0.5) * this.noise;
        const d = Math.sqrt(dx * dx + dy * dy);
        const f = d * this.forceFactor;
        point.vx += f * ((dx / d) || 0);
        point.vy += f * ((dy / d) || 0);
        for (let touchIndex = 0; touchIndex < this.touches.length; touchIndex++) {
          const touch = this.touches[touchIndex];
          let 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;
          }
          const mx = point.x - touch.x;
          const my = point.y - touch.y;
          const md = Math.sqrt(mx * mx + my * my);
          const 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);
        }
        point.vx *= layer.viscosity;
        point.vy *= layer.viscosity;
        point.x += point.vx;
        point.y += point.vy;
      }
      for (let pointIndex = 0; pointIndex < points.length; pointIndex++) {
        const prev = points[(pointIndex + points.length - 1) % points.length]; 
        const point = points[pointIndex];
        const next = points[(pointIndex + points.length + 1) % points.length];
        const dPrev = this.distance(point, prev);
        const dNext = this.distance(point, next);

        const line = {
          x: next.x - prev.x,
          y: next.y - prev.y,
        };
        const 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,
        };
      }
    }
  }

  animate() {
    this.raf(() => {
      this.update();
      this.draw();
      this.animate();
    });
  }

  get svgWidth() {
    return this.width + this.margin * 2;
  }

  get svgHeight() {
    return this.height + this.margin * 2;
  }

  draw() {
    for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
      const layer = this.layers[layerIndex];
      if (layerIndex === 1) {
        if (this.touches.length > 0) {
          while (this.svgDefs.firstChild) {
            this.svgDefs.removeChild(this.svgDefs.firstChild);
          }
          for (let touchIndex = 0; touchIndex < this.touches.length; touchIndex++) {
            const touch = this.touches[touchIndex];
            const gradient = document.createElementNS(this.xmlns, 'radialGradient');
            gradient.id = 'liquid-gradient-' + this.id + '-' + touchIndex;
            const start = document.createElementNS(this.xmlns, 'stop');
            start.setAttribute('stop-color', this.color3);
            start.setAttribute('offset', '0%');
            const 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 + ')';
          }
        } else {
          layer.path.style.fill = this.color2;
        }
      } else {
        layer.path.style.fill = this.color1;
      }
      const points = layer.points;
      const commands = [];
      commands.push('M', points[0].x, points[0].y);
      for (let pointIndex = 1; pointIndex < points.length; pointIndex += 1) {
        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
        );
      }
      commands.push('Z');
      layer.path.setAttribute('d', commands.join(' '));
    }
    this.svgText.textContent = this.text;
    this.svgText.style.fill = this.textColor;
  }

  createPoint(x, y) {
    return {
      x: x,
      y: y,
      ox: x,
      oy: y,
      vx: 0,
      vy: 0,
    };
  }

  initOrigins() {
    this.svg.setAttribute('width', this.svgWidth);
    this.svg.setAttribute('height', this.svgHeight);
    for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
      const layer = this.layers[layerIndex];
      const points = [];
      for (let x = ~~(this.height / 2); x < this.width - ~~(this.height / 2); x += this.gap) {
        points.push(this.createPoint(
          x + this.margin,
          this.margin
        ));
      }
      for (let alpha = ~~(this.height * 1.25); alpha >= 0; alpha -= this.gap) {
        const 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
        ));
      }
      for (let x = this.width - ~~(this.height / 2) - 1; x >= ~~(this.height / 2); x -= this.gap) {
        points.push(this.createPoint(
          x + this.margin,
          this.margin + this.height
        ));
      }
      for (let alpha = 0; alpha <= ~~(this.height * 1.25); alpha += this.gap) {
        const 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
        ));
      }
      layer.points = points;
    }
  }
}


const redraw = () => {
  button.initOrigins();
};

const buttons = document.getElementsByClassName('liquid-button');
for (let buttonIndex = 0; buttonIndex < buttons.length; buttonIndex++) {
  const button = buttons[buttonIndex];
  button.liquidButton = new LiquidButton(button);
}
            
          
!
999px
Loading ..................

Console