(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (factory((global.TinySVG = {})));
}(this, (function (exports) { 'use strict';

  function ensureImported(element, target) {

    if (element.ownerDocument !== target.ownerDocument) {
      try {
        // may fail on webkit
        return target.ownerDocument.importNode(element, true);
      } catch (e) {
        // ignore
      }
    }

    return element;
  }

  /**
   * appendTo utility
   */

  /**
   * Append a node to a target element and return the appended node.
   *
   * @param  {SVGElement} element
   * @param  {SVGElement} target
   *
   * @return {SVGElement} the appended node
   */
  function appendTo(element, target) {
    return target.appendChild(ensureImported(element, target));
  }

  /**
   * append utility
   */

  /**
   * Append a node to an element
   *
   * @param  {SVGElement} element
   * @param  {SVGElement} node
   *
   * @return {SVGElement} the element
   */
  function append(target, node) {
    appendTo(node, target);
    return target;
  }

  /**
   * attribute accessor utility
   */

  var LENGTH_ATTR = 2;

  var CSS_PROPERTIES = {
    'alignment-baseline': 1,
    'baseline-shift': 1,
    'clip': 1,
    'clip-path': 1,
    'clip-rule': 1,
    'color': 1,
    'color-interpolation': 1,
    'color-interpolation-filters': 1,
    'color-profile': 1,
    'color-rendering': 1,
    'cursor': 1,
    'direction': 1,
    'display': 1,
    'dominant-baseline': 1,
    'enable-background': 1,
    'fill': 1,
    'fill-opacity': 1,
    'fill-rule': 1,
    'filter': 1,
    'flood-color': 1,
    'flood-opacity': 1,
    'font': 1,
    'font-family': 1,
    'font-size': LENGTH_ATTR,
    'font-size-adjust': 1,
    'font-stretch': 1,
    'font-style': 1,
    'font-variant': 1,
    'font-weight': 1,
    'glyph-orientation-horizontal': 1,
    'glyph-orientation-vertical': 1,
    'image-rendering': 1,
    'kerning': 1,
    'letter-spacing': 1,
    'lighting-color': 1,
    'marker': 1,
    'marker-end': 1,
    'marker-mid': 1,
    'marker-start': 1,
    'mask': 1,
    'opacity': 1,
    'overflow': 1,
    'pointer-events': 1,
    'shape-rendering': 1,
    'stop-color': 1,
    'stop-opacity': 1,
    'stroke': 1,
    'stroke-dasharray': 1,
    'stroke-dashoffset': 1,
    'stroke-linecap': 1,
    'stroke-linejoin': 1,
    'stroke-miterlimit': 1,
    'stroke-opacity': 1,
    'stroke-width': LENGTH_ATTR,
    'text-anchor': 1,
    'text-decoration': 1,
    'text-rendering': 1,
    'unicode-bidi': 1,
    'visibility': 1,
    'word-spacing': 1,
    'writing-mode': 1
  };


  function getAttribute(node, name) {
    if (CSS_PROPERTIES[name]) {
      return node.style[name];
    } else {
      return node.getAttributeNS(null, name);
    }
  }

  function setAttribute(node, name, value) {
    var hyphenated = name.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();

    var type = CSS_PROPERTIES[hyphenated];

    if (type) {
      // append pixel unit, unless present
      if (type === LENGTH_ATTR && typeof value === 'number') {
        value = String(value) + 'px';
      }

      node.style[hyphenated] = value;
    } else {
      node.setAttributeNS(null, name, value);
    }
  }

  function setAttributes(node, attrs) {

    var names = Object.keys(attrs), i, name;

    for (i = 0, name; (name = names[i]); i++) {
      setAttribute(node, name, attrs[name]);
    }
  }

  /**
   * Gets or sets raw attributes on a node.
   *
   * @param  {SVGElement} node
   * @param  {Object} [attrs]
   * @param  {String} [name]
   * @param  {String} [value]
   *
   * @return {String}
   */
  function attr(node, name, value) {
    if (typeof name === 'string') {
      if (value !== undefined) {
        setAttribute(node, name, value);
      } else {
        return getAttribute(node, name);
      }
    } else {
      setAttributes(node, name);
    }

    return node;
  }

  /**
   * Clear utility
   */
  function index(arr, obj) {
    if (arr.indexOf) {
      return arr.indexOf(obj);
    }


    for (var i = 0; i < arr.length; ++i) {
      if (arr[i] === obj) {
        return i;
      }
    }

    return -1;
  }

  var re = /\s+/;

  var toString = Object.prototype.toString;

  function defined(o) {
    return typeof o !== 'undefined';
  }

  /**
   * Wrap `el` in a `ClassList`.
   *
   * @param {Element} el
   * @return {ClassList}
   * @api public
   */

  function classes(el) {
    return new ClassList(el);
  }

  function ClassList(el) {
    if (!el || !el.nodeType) {
      throw new Error('A DOM element reference is required');
    }
    this.el = el;
    this.list = el.classList;
  }

  /**
   * Add class `name` if not already present.
   *
   * @param {String} name
   * @return {ClassList}
   * @api public
   */

  ClassList.prototype.add = function(name) {

    // classList
    if (this.list) {
      this.list.add(name);
      return this;
    }

    // fallback
    var arr = this.array();
    var i = index(arr, name);
    if (!~i) {
      arr.push(name);
    }

    if (defined(this.el.className.baseVal)) {
      this.el.className.baseVal = arr.join(' ');
    } else {
      this.el.className = arr.join(' ');
    }

    return this;
  };

  /**
   * Remove class `name` when present, or
   * pass a regular expression to remove
   * any which match.
   *
   * @param {String|RegExp} name
   * @return {ClassList}
   * @api public
   */

  ClassList.prototype.remove = function(name) {
    if ('[object RegExp]' === toString.call(name)) {
      return this.removeMatching(name);
    }

    // classList
    if (this.list) {
      this.list.remove(name);
      return this;
    }

    // fallback
    var arr = this.array();
    var i = index(arr, name);
    if (~i) {
      arr.splice(i, 1);
    }
    this.el.className.baseVal = arr.join(' ');
    return this;
  };

  /**
   * Remove all classes matching `re`.
   *
   * @param {RegExp} re
   * @return {ClassList}
   * @api private
   */

  ClassList.prototype.removeMatching = function(re) {
    var arr = this.array();
    for (var i = 0; i < arr.length; i++) {
      if (re.test(arr[i])) {
        this.remove(arr[i]);
      }
    }
    return this;
  };

  /**
   * Toggle class `name`, can force state via `force`.
   *
   * For browsers that support classList, but do not support `force` yet,
   * the mistake will be detected and corrected.
   *
   * @param {String} name
   * @param {Boolean} force
   * @return {ClassList}
   * @api public
   */

  ClassList.prototype.toggle = function(name, force) {
    // classList
    if (this.list) {
      if (defined(force)) {
        if (force !== this.list.toggle(name, force)) {
          this.list.toggle(name); // toggle again to correct
        }
      } else {
        this.list.toggle(name);
      }
      return this;
    }

    // fallback
    if (defined(force)) {
      if (!force) {
        this.remove(name);
      } else {
        this.add(name);
      }
    } else {
      if (this.has(name)) {
        this.remove(name);
      } else {
        this.add(name);
      }
    }

    return this;
  };

  /**
   * Return an array of classes.
   *
   * @return {Array}
   * @api public
   */

  ClassList.prototype.array = function() {
    var className = this.el.getAttribute('class') || '';
    var str = className.replace(/^\s+|\s+$/g, '');
    var arr = str.split(re);
    if ('' === arr[0]) {
      arr.shift();
    }
    return arr;
  };

  /**
   * Check if class `name` is present.
   *
   * @param {String} name
   * @return {ClassList}
   * @api public
   */

  ClassList.prototype.has =
  ClassList.prototype.contains = function(name) {
    return (
      this.list ?
        this.list.contains(name) :
        !! ~index(this.array(), name)
    );
  };

  function remove(element) {
    var parent = element.parentNode;

    if (parent) {
      parent.removeChild(element);
    }

    return element;
  }

  /**
   * Clear utility
   */

  /**
   * Removes all children from the given element
   *
   * @param  {DOMElement} element
   * @return {DOMElement} the element (for chaining)
   */
  function clear(element) {
    var child;

    while ((child = element.firstChild)) {
      remove(child);
    }

    return element;
  }

  function clone(element) {
    return element.cloneNode(true);
  }

  var ns = {
    svg: 'http://www.w3.org/2000/svg'
  };

  /**
   * DOM parsing utility
   */

  var SVG_START = '<svg xmlns="' + ns.svg + '"';

  function parse(svg) {

    var unwrap = false;

    // ensure we import a valid svg document
    if (svg.substring(0, 4) === '<svg') {
      if (svg.indexOf(ns.svg) === -1) {
        svg = SVG_START + svg.substring(4);
      }
    } else {
      // namespace svg
      svg = SVG_START + '>' + svg + '</svg>';
      unwrap = true;
    }

    var parsed = parseDocument(svg);

    if (!unwrap) {
      return parsed;
    }

    var fragment = document.createDocumentFragment();

    var parent = parsed.firstChild;

    while (parent.firstChild) {
      fragment.appendChild(parent.firstChild);
    }

    return fragment;
  }

  function parseDocument(svg) {

    var parser;

    // parse
    parser = new DOMParser();
    parser.async = false;

    return parser.parseFromString(svg, 'text/xml');
  }

  /**
   * Create utility for SVG elements
   */


  /**
   * Create a specific type from name or SVG markup.
   *
   * @param {String} name the name or markup of the element
   * @param {Object} [attrs] attributes to set on the element
   *
   * @returns {SVGElement}
   */
  function create(name, attrs) {
    var element;

    if (name.charAt(0) === '<') {
      element = parse(name).firstChild;
      element = document.importNode(element, true);
    } else {
      element = document.createElementNS(ns.svg, name);
    }

    if (attrs) {
      attr(element, attrs);
    }

    return element;
  }

  /**
   * Events handling utility
   */

  function on(node, event, listener, useCapture) {
    node.addEventListener(event, listener, useCapture);
  }

  function off(node, event, listener, useCapture) {
    node.removeEventListener(event, listener, useCapture);
  }

  /**
   * Geometry helpers
   */

  // fake node used to instantiate svg geometry elements
  var node = create('svg');

  function extend(object, props) {
    var i, k, keys = Object.keys(props);

    for (i = 0; (k = keys[i]); i++) {
      object[k] = props[k];
    }

    return object;
  }


  function createPoint(x, y) {
    var point = node.createSVGPoint();

    switch (arguments.length) {
    case 0:
      return point;
    case 2:
      x = {
        x: x,
        y: y
      };
      break;
    }

    return extend(point, x);
  }

  /**
   * Create matrix via args.
   *
   * @example
   *
   * createMatrix({ a: 1, b: 1 });
   * createMatrix();
   * createMatrix(1, 2, 0, 0, 30, 20);
   *
   * @return {SVGMatrix}
   */
  function createMatrix(a, b, c, d, e, f) {
    var matrix = node.createSVGMatrix();

    switch (arguments.length) {
    case 0:
      return matrix;
    case 1:
      return extend(matrix, a);
    case 6:
      return extend(matrix, {
        a: a,
        b: b,
        c: c,
        d: d,
        e: e,
        f: f
      });
    }
  }

  function createTransform(matrix) {
    if (matrix) {
      return node.createSVGTransformFromMatrix(matrix);
    } else {
      return node.createSVGTransform();
    }
  }

  /**
   * Serialization util
   */

  var TEXT_ENTITIES = /([&<>]{1})/g;
  var ATTR_ENTITIES = /([\n\r"]{1})/g;

  var ENTITY_REPLACEMENT = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '\''
  };

  function escape(str, pattern) {

    function replaceFn(match, entity) {
      return ENTITY_REPLACEMENT[entity] || entity;
    }

    return str.replace(pattern, replaceFn);
  }

  function serialize(node, output) {

    var i, len, attrMap, attrNode, childNodes;

    switch (node.nodeType) {
    // TEXT
    case 3:
      // replace special XML characters
      output.push(escape(node.textContent, TEXT_ENTITIES));
      break;

    // ELEMENT
    case 1:
      output.push('<', node.tagName);

      if (node.hasAttributes()) {
        attrMap = node.attributes;
        for (i = 0, len = attrMap.length; i < len; ++i) {
          attrNode = attrMap.item(i);
          output.push(' ', attrNode.name, '="', escape(attrNode.value, ATTR_ENTITIES), '"');
        }
      }

      if (node.hasChildNodes()) {
        output.push('>');
        childNodes = node.childNodes;
        for (i = 0, len = childNodes.length; i < len; ++i) {
          serialize(childNodes.item(i), output);
        }
        output.push('</', node.tagName, '>');
      } else {
        output.push('/>');
      }
      break;

    // COMMENT
    case 8:
      output.push('<!--', escape(node.nodeValue, TEXT_ENTITIES), '-->');
      break;

    // CDATA
    case 4:
      output.push('<![CDATA[', node.nodeValue, ']]>');
      break;

    default:
      throw new Error('unable to handle node ' + node.nodeType);
    }

    return output;
  }

  /**
   * innerHTML like functionality for SVG elements.
   * based on innerSVG (https://code.google.com/p/innersvg)
   */


  function set(element, svg) {

    var parsed = parse(svg);

    // clear element contents
    clear(element);

    if (!svg) {
      return;
    }

    if (!isFragment(parsed)) {
      // extract <svg> from parsed document
      parsed = parsed.documentElement;
    }

    var nodes = slice(parsed.childNodes);

    // import + append each node
    for (var i = 0; i < nodes.length; i++) {
      appendTo(nodes[i], element);
    }

  }

  function get(element) {
    var child = element.firstChild,
        output = [];

    while (child) {
      serialize(child, output);
      child = child.nextSibling;
    }

    return output.join('');
  }

  function isFragment(node) {
    return node.nodeName === '#document-fragment';
  }

  function innerSVG(element, svg) {

    if (svg !== undefined) {

      try {
        set(element, svg);
      } catch (e) {
        throw new Error('error parsing SVG: ' + e.message);
      }

      return element;
    } else {
      return get(element);
    }
  }


  function slice(arr) {
    return Array.prototype.slice.call(arr);
  }

  /**
   * Selection utilities
   */

  function select(node, selector) {
    return node.querySelector(selector);
  }

  function selectAll(node, selector) {
    var nodes = node.querySelectorAll(selector);

    return [].map.call(nodes, function(element) {
      return element;
    });
  }

  /**
   * prependTo utility
   */

  /**
   * Prepend a node to a target element and return the prepended node.
   *
   * @param  {SVGElement} node
   * @param  {SVGElement} target
   *
   * @return {SVGElement} the prepended node
   */
  function prependTo(node, target) {
    return target.insertBefore(ensureImported(node, target), target.firstChild || null);
  }

  /**
   * prepend utility
   */

  /**
   * Prepend a node to a target element
   *
   * @param  {SVGElement} target
   * @param  {SVGElement} node
   *
   * @return {SVGElement} the target element
   */
  function prepend(target, node) {
    prependTo(node, target);
    return target;
  }

  /**
   * Replace utility
   */

  function replace(element, replacement) {
    element.parentNode.replaceChild(ensureImported(replacement, element), element);
    return replacement;
  }

  /**
   * transform accessor utility
   */

  function wrapMatrix(transformList, transform) {
    if (transform instanceof SVGMatrix) {
      return transformList.createSVGTransformFromMatrix(transform);
    }

    return transform;
  }


  function setTransforms(transformList, transforms) {
    var i, t;

    transformList.clear();

    for (i = 0; (t = transforms[i]); i++) {
      transformList.appendItem(wrapMatrix(transformList, t));
    }
  }

  /**
   * Get or set the transforms on the given node.
   *
   * @param {SVGElement} node
   * @param  {SVGTransform|SVGMatrix|Array<SVGTransform|SVGMatrix>} [transforms]
   *
   * @return {SVGTransform} the consolidated transform
   */
  function transform(node, transforms) {
    var transformList = node.transform.baseVal;

    if (transforms) {

      if (!Array.isArray(transforms)) {
        transforms = [ transforms ];
      }

      setTransforms(transformList, transforms);
    }

    return transformList.consolidate();
  }

  exports.append = append;
  exports.appendTo = appendTo;
  exports.attr = attr;
  exports.classes = classes;
  exports.clear = clear;
  exports.clone = clone;
  exports.create = create;
  exports.innerSVG = innerSVG;
  exports.prepend = prepend;
  exports.prependTo = prependTo;
  exports.remove = remove;
  exports.replace = replace;
  exports.transform = transform;
  exports.on = on;
  exports.off = off;
  exports.createPoint = createPoint;
  exports.createMatrix = createMatrix;
  exports.createTransform = createTransform;
  exports.select = select;
  exports.selectAll = selectAll;

  Object.defineProperty(exports, '__esModule', { value: true });

})));