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

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

var classCallCheck = function (instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
};

/**
 * Created by Șandor Sergiu (micku7zu) on 1/27/2017.
 * Original idea: https://github.com/gijsroge/tilt.js
 * MIT License.
 * Version 1.4.1
 */

var VanillaTilt = function () {
  function VanillaTilt(element) {
    var settings = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    classCallCheck(this, VanillaTilt);

    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.resetBind = this.reset.bind(this);

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

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

    this.glare = this.isSettingTrue(this.settings.glare);
    this.glarePrerender = this.isSettingTrue(this.settings["glare-prerender"]);

    if (this.glare) {
      this.prepareGlare();
    }

    this.addEventListeners();
  }

  VanillaTilt.prototype.isSettingTrue = function isSettingTrue(setting) {
    return setting === "" || setting === true || setting === 1;
  };

  VanillaTilt.prototype.addEventListeners = function addEventListeners() {
    this.onMouseEnterBind = this.onMouseEnter.bind(this);
    this.onMouseMoveBind = this.onMouseMove.bind(this);
    this.onMouseLeaveBind = this.onMouseLeave.bind(this);
    this.onWindowResizeBind = this.onWindowResizeBind.bind(this);

    this.element.addEventListener("mouseenter", this.onMouseEnterBind);
    this.element.addEventListener("mousemove", this.onMouseMoveBind);
    this.element.addEventListener("mouseleave", this.onMouseLeaveBind);
    if (this.glare) {
      window.addEventListener("resize", this.onWindowResizeBind);
    }
  };

  VanillaTilt.prototype.removeEventListeners = function removeEventListeners() {
    this.element.removeEventListener("mouseenter", this.onMouseEnterBind);
    this.element.removeEventListener("mousemove", this.onMouseMoveBind);
    this.element.removeEventListener("mouseleave", this.onMouseLeaveBind);
    if (this.glare) {
      window.removeEventListener("resize", this.onWindowResizeBind);
    }
  };

  VanillaTilt.prototype.destroy = function destroy() {
    clearTimeout(this.transitionTimeout);
    if (this.updateCall !== null) {
      cancelAnimationFrame(this.updateCall);
    }

    this.reset();

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

    this.element = null;
  };

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

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

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

  VanillaTilt.prototype.onMouseLeave = function onMouseLeave(event) {
    this.setTransition();

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

  VanillaTilt.prototype.reset = function reset() {
    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)";

    if (this.glare) {
      this.glareElement.style.transform = 'rotate(180deg) translate(-50%, -50%)';
      this.glareElement.style.opacity = '0';
    }
  };

  VanillaTilt.prototype.getValues = function getValues() {
    var x = (this.event.clientX - this.left) / this.width;
    var y = (this.event.clientY - this.top) / this.height;

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

    var tiltX = (this.reverse * (this.settings.max / 2 - x * this.settings.max)).toFixed(2);
    var tiltY = (this.reverse * (y * this.settings.max - this.settings.max / 2)).toFixed(2);
    var angle = Math.atan2(this.event.clientX - (this.left + this.width / 2), -(this.event.clientY - (this.top + this.height / 2))) * (180 / Math.PI);

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

  VanillaTilt.prototype.updateElementPosition = function updateElementPosition() {
    var rect = this.element.getBoundingClientRect();

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

  VanillaTilt.prototype.update = function update() {
    var 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 + ")";

    if (this.glare) {
      this.glareElement.style.transform = "rotate(" + values.angle + "deg) translate(-50%, -50%)";
      this.glareElement.style.opacity = "" + values.percentageY * this.settings["max-glare"] / 100;
    }

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

    this.updateCall = null;
  };

  /**
   * Appends the glare element (if glarePrerender equals false)
   * and sets the default style
   */


  VanillaTilt.prototype.prepareGlare = function prepareGlare() {
    // If option pre-render is enabled we assume all html/css is present for an optimal glare effect.
    if (!this.glarePrerender) {
      // Create glare element
      var jsTiltGlare = document.createElement("div");
      jsTiltGlare.classList.add("js-tilt-glare");

      var jsTiltGlareInner = document.createElement("div");
      jsTiltGlareInner.classList.add("js-tilt-glare-inner");

      jsTiltGlare.appendChild(jsTiltGlareInner);
      this.element.appendChild(jsTiltGlare);
    }

    this.glareElementWrapper = this.element.querySelector(".js-tilt-glare");
    this.glareElement = this.element.querySelector(".js-tilt-glare-inner");

    if (this.glarePrerender) {
      return;
    }

    Object.assign(this.glareElementWrapper.style, {
      "position": "absolute",
      "top": "0",
      "left": "0",
      "width": "100%",
      "height": "100%",
      "overflow": "hidden"
    });

    Object.assign(this.glareElement.style, {
      'position': 'absolute',
      'top': '50%',
      'left': '50%',
      'pointer-events': 'none',
      'background-image': "linear-gradient(0deg, rgba(255,255,255,0) 0%, rgba(255,255,255,1) 100%)",
      'width': this.element.offsetWidth * 2 + "px",
      'height': this.element.offsetWidth * 2 + "px",
      'transform': 'rotate(180deg) translate(-50%, -50%)',
      'transform-origin': '0% 0%',
      'opacity': '0'
    });
  };

  VanillaTilt.prototype.updateGlareSize = function updateGlareSize() {
    Object.assign(this.glareElement.style, {
      'width': "" + this.element.offsetWidth * 2,
      'height': "" + this.element.offsetWidth * 2
    });
  };

  VanillaTilt.prototype.onWindowResizeBind = function onWindowResizeBind() {
    this.updateGlareSize();
  };

  VanillaTilt.prototype.setTransition = function setTransition() {
    var _this = this;

    clearTimeout(this.transitionTimeout);
    this.element.style.transition = this.settings.speed + "ms " + this.settings.easing;
    if (this.glare) this.glareElement.style.transition = "opacity " + this.settings.speed + "ms " + this.settings.easing;

    this.transitionTimeout = setTimeout(function () {
      _this.element.style.transition = "";
      if (_this.glare) {
        _this.glareElement.style.transition = "";
      }
    }, this.settings.speed);
  };

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

    var newSettings = {};
    for (var property in defaultSettings) {
      if (property in settings) {
        newSettings[property] = settings[property];
      } else if (this.element.hasAttribute("data-tilt-" + property)) {
        var 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;
  };

  VanillaTilt.init = function init(elements, settings) {
    if (elements instanceof Node) {
      elements = [elements];
    }

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

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

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

  return VanillaTilt;
}();

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

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

return VanillaTilt;

}());