vanilla-tilt.js/dist/vanilla-tilt.js

var VanillaTilt = (function () {
'use strict';

/**
 * Created by Șandor Sergiu (micku7zu) on 1/27/2017.
 * Original idea: https://github.com/gijsroge/tilt.js
 * MIT License.
 * Version 1.2.1
 */

class VanillaTilt {
  constructor(element, settings = {}) {
    if (!(element instanceof Node)) {
      throw ("Can't initialize VanillaTilt because " + element + " is not a Node.");
    }

    this.width = null;
    this.height = null;
    this.left = null;
    this.top = null;
    this.transitionTimeout = null;
    this.updateCall = null;

    this.updateBind = this.update.bind(this);

    this.element = element;
    this.settings = this.extendSettings(settings);

    this.reverse = this.settings.reverse ? -1 : 1;

    this.addEventListeners();
  }

  addEventListeners() {
    this.onMouseEnterBind = this.onMouseEnter.bind(this);
    this.onMouseMoveBind = this.onMouseMove.bind(this);
    this.onMouseLeaveBind = this.onMouseLeave.bind(this);

    this.element.addEventListener("mouseenter", this.onMouseEnterBind);
    this.element.addEventListener("mousemove", this.onMouseMoveBind);
    this.element.addEventListener("mouseleave", this.onMouseLeaveBind);
  }

  removeEventListeners() {
    this.element.removeEventListener("mouseenter", this.onMouseEnterBind);
    this.element.removeEventListener("mousemove", this.onMouseMoveBind);
    this.element.removeEventListener("mouseleave", this.onMouseLeaveBind);
  }

  destroy() {
    this.removeEventListeners();
    this.element.vanillaTilt = null;
    delete this.element.vanillaTilt;

    this.element = null;
  }

  onMouseEnter(event) {
    this.updateElementPosition();
    this.element.style.willChange = "transform";
    this.setTransition();
  }

  onMouseMove(event) {
    if (this.updateCall !== null) {
      cancelAnimationFrame(this.updateCall);
    }

    this.event = event;
    this.updateCall = requestAnimationFrame(this.updateBind);
  }

  onMouseLeave(event) {
    this.setTransition();

    if (this.settings.reset) {
      this.reset();
    }
  }

  reset() {
    requestAnimationFrame(() => {
      this.event = {
        pageX: this.left + this.width / 2,
        pageY: this.top + this.height / 2
      };

      this.element.style.transform = "perspective(" + this.settings.perspective + "px) " +
        "rotateX(0deg) " +
        "rotateY(0deg) " +
        "scale3d(1, 1, 1)";
    });
  }

  getValues() {
    let x = (this.event.clientX - this.left) / this.width;
    let y = (this.event.clientY - this.top) / this.height;

    x = Math.min(Math.max(x, 0), 1);
    y = Math.min(Math.max(y, 0), 1);

    let tiltX = (this.reverse * (this.settings.max / 2 - x * this.settings.max)).toFixed(2);
    let tiltY = (this.reverse * (y * this.settings.max - this.settings.max / 2)).toFixed(2);

    return {
      tiltX: tiltX,
      tiltY: tiltY,
      percentageX: x * 100,
      percentageY: y * 100
    };
  }

  updateElementPosition() {
    let rect = this.element.getBoundingClientRect();

    this.width = this.element.offsetWidth;
    this.height = this.element.offsetHeight;
    this.left = rect.left;
    this.top = rect.top;
  }

  update() {
    let values = this.getValues();

    this.element.style.transform = "perspective(" + this.settings.perspective + "px) " +
      "rotateX(" + (this.settings.axis === "x" ? 0 : values.tiltY) + "deg) " +
      "rotateY(" + (this.settings.axis === "y" ? 0 : values.tiltX) + "deg) " +
      "scale3d(" + this.settings.scale + ", " + this.settings.scale + ", " + this.settings.scale + ")";


    this.element.dispatchEvent(new CustomEvent("tiltChange", {
      "detail": values
    }));

    this.updateCall = null;
  }

  setTransition() {
    clearTimeout(this.transitionTimeout);
    this.element.style.transition = this.settings.speed + "ms " + this.settings.easing;
    this.transitionTimeout = setTimeout(() => this.element.style.transition = "", this.settings.speed);
  }

  extendSettings(settings) {
    let defaultSettings = {
      reverse: false,
      max: 35,
      perspective: 1000,
      easing: "cubic-bezier(.03,.98,.52,.99)",
      scale: "1",
      speed: "300",
      transition: true,
      axis: null,
      reset: true
    };

    let newSettings = {};

    for (var property in defaultSettings) {
      if (property in settings) {
        newSettings[property] = settings[property];
      } else if (this.element.hasAttribute("data-tilt-" + property)) {
        let attribute = this.element.getAttribute("data-tilt-" + property);
        try {
          newSettings[property] = JSON.parse(attribute);
        } catch (e) {
          newSettings[property] = attribute;
        }

      } else {
        newSettings[property] = defaultSettings[property];
      }
    }

    return newSettings;
  }

  static init(elements, settings) {
    if (elements instanceof Node) {
      elements = [elements];
    }

    if (elements instanceof NodeList) {
      elements = [].slice.call(elements);
    }

    if (!(elements instanceof Array)) {
      return;
    }

    elements.forEach((element) => {
      if (!("vanillaTilt" in element)) {
        element.vanillaTilt = new VanillaTilt(element, settings);
      }
    });
  }
}

if (typeof document !== "undefined") {
  /* expose the class to window */
  window.VanillaTilt = VanillaTilt;

  /**
   * Auto load
   */
  VanillaTilt.init(document.querySelectorAll("[data-tilt]"));
}

return VanillaTilt;

}());