diff --git a/pangu.simple.js b/pangu.simple.js
deleted file mode 100644
index 0d5b86b..0000000
--- a/pangu.simple.js
+++ /dev/null
@@ -1,689 +0,0 @@
-/*!
- * pangu.simple.js
- * --------
- * @version: 1.0.5
- * @homepage: https://github.com/backrunner/pangu.simple.js
- * @license: MIT
- * @author: BackRunner
- */
-(function webpackUniversalModuleDefinition(root, factory) {
-	if(typeof exports === 'object' && typeof module === 'object')
-		module.exports = factory();
-	else if(typeof define === 'function' && define.amd)
-		define("pangu", [], factory);
-	else if(typeof exports === 'object')
-		exports["pangu"] = factory();
-	else
-		root["pangu"] = factory();
-})(window, function() {
-return 
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-/******/ 		module.l = true;
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-  function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
-
-  var _require = __webpack_require__(1),
-      Pangu = _require.Pangu;
-
-  function once(func) {
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-        _this = this;
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-    var executed = false;
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-      executed = true;
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-      if (!startTime) {
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-      }
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-      if (currentTime - startTime >= mustRunDelay) {
-        func.apply(self, args);
-        startTime = currentTime;
-      } else {
-        timer = setTimeout(function () {
-          func.apply(self, args);
-        }, delay);
-      }
-    };
-  }
-
-  var BrowserPangu = function (_Pangu) {
-    _inherits(BrowserPangu, _Pangu);
-
-    var _super = _createSuper(BrowserPangu);
-
-    function BrowserPangu() {
-      var _this3;
-
-      _classCallCheck(this, BrowserPangu);
-
-      _this3 = _super.call(this);
-      _this3.blockTags = /^(div|p|h1|h2|h3|h4|h5|h6)$/i;
-      _this3.ignoredTags = /^(script|code|pre|textarea)$/i;
-      _this3.presentationalTags = /^(b|code|del|em|i|s|strong|kbd)$/i;
-      _this3.spaceLikeTags = /^(br|hr|i|img|pangu)$/i;
-      _this3.spaceSensitiveTags = /^(a|del|pre|s|strike|u)$/i;
-      _this3.isAutoSpacingPageExecuted = false;
-      return _this3;
-    }
-
-    _createClass(BrowserPangu, [{
-      key: "isContentEditable",
-      value: function isContentEditable(node) {
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-      }
-    }, {
-      key: "isSpecificTag",
-      value: function isSpecificTag(node, tagRegex) {
-        return node && node.nodeName && node.nodeName.search(tagRegex) >= 0;
-      }
-    }, {
-      key: "isInsideSpecificTag",
-      value: function isInsideSpecificTag(node, tagRegex) {
-        var checkCurrent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
-        var currentNode = node;
-
-        if (checkCurrent) {
-          if (this.isSpecificTag(currentNode, tagRegex)) {
-            return true;
-          }
-        }
-
-        while (currentNode.parentNode) {
-          currentNode = currentNode.parentNode;
-
-          if (this.isSpecificTag(currentNode, tagRegex)) {
-            return true;
-          }
-        }
-
-        return false;
-      }
-    }, {
-      key: "canIgnoreNode",
-      value: function canIgnoreNode(node) {
-        var currentNode = node;
-
-        if (currentNode && (this.isSpecificTag(currentNode, this.ignoredTags) || this.isContentEditable(currentNode))) {
-          return true;
-        }
-
-        while (currentNode.parentNode) {
-          currentNode = currentNode.parentNode;
-
-          if (currentNode && (this.isSpecificTag(currentNode, this.ignoredTags) || this.isContentEditable(currentNode))) {
-            return true;
-          }
-        }
-
-        return false;
-      }
-    }, {
-      key: "isFirstTextChild",
-      value: function isFirstTextChild(parentNode, targetNode) {
-        var childNodes = parentNode.childNodes;
-
-        for (var i = 0; i < childNodes.length; i++) {
-          var childNode = childNodes[i];
-
-          if (childNode.nodeType !== Node.COMMENT_NODE && childNode.textContent) {
-            return childNode === targetNode;
-          }
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-
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-      key: "isLastTextChild",
-      value: function isLastTextChild(parentNode, targetNode) {
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-        for (var i = childNodes.length - 1; i > -1; i--) {
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-
-          if (childNode.nodeType !== Node.COMMENT_NODE && childNode.textContent) {
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-          }
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-      value: function spacingNodeByXPath(xPathQuery, contextNode) {
-        if (!(contextNode instanceof Node) || contextNode instanceof DocumentFragment) {
-          return;
-        }
-
-        var textNodes = document.evaluate(xPathQuery, contextNode, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
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-
-          if (this.isSpecificTag(currentTextNode.parentNode, this.presentationalTags) && !this.isInsideSpecificTag(currentTextNode.parentNode, this.ignoredTags)) {
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-              if (previousSibling.nodeType === Node.TEXT_NODE) {
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-                var testNewText = this.spacing(testText);
-
-                if (testText !== testNewText) {
-                  previousSibling.data = "".concat(previousSibling.data, " ");
-                }
-              }
-            }
-
-            if (elementNode.nextSibling) {
-              var nextSibling = elementNode.nextSibling;
-
-              if (nextSibling.nodeType === Node.TEXT_NODE) {
-                var _testText = currentTextNode.data.substr(-1) + nextSibling.data.toString().charAt(0);
-
-                var _testNewText = this.spacing(_testText);
-
-                if (_testText !== _testNewText) {
-                  nextSibling.data = " ".concat(nextSibling.data);
-                }
-              }
-            }
-          }
-
-          if (this.canIgnoreNode(currentTextNode)) {
-            nextTextNode = currentTextNode;
-            continue;
-          }
-
-          var newText = this.spacing(currentTextNode.data);
-
-          if (currentTextNode.data !== newText) {
-            currentTextNode.data = newText;
-          }
-
-          if (nextTextNode) {
-            if (currentTextNode.nextSibling && currentTextNode.nextSibling.nodeName.search(this.spaceLikeTags) >= 0) {
-              nextTextNode = currentTextNode;
-              continue;
-            }
-
-            var _testText2 = currentTextNode.data.toString().substr(-1) + nextTextNode.data.toString().substr(0, 1);
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-            var _testNewText2 = this.spacing(_testText2);
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-            if (_testNewText2 !== _testText2) {
-              var nextNode = nextTextNode;
-
-              while (nextNode.parentNode && nextNode.nodeName.search(this.spaceSensitiveTags) === -1 && this.isFirstTextChild(nextNode.parentNode, nextNode)) {
-                nextNode = nextNode.parentNode;
-              }
-
-              var currentNode = currentTextNode;
-
-              while (currentNode.parentNode && currentNode.nodeName.search(this.spaceSensitiveTags) === -1 && this.isLastTextChild(currentNode.parentNode, currentNode)) {
-                currentNode = currentNode.parentNode;
-              }
-
-              if (currentNode.nextSibling) {
-                if (currentNode.nextSibling.nodeName.search(this.spaceLikeTags) >= 0) {
-                  nextTextNode = currentTextNode;
-                  continue;
-                }
-              }
-
-              if (currentNode.nodeName.search(this.blockTags) === -1) {
-                if (nextNode.nodeName.search(this.spaceSensitiveTags) === -1) {
-                  if (nextNode.nodeName.search(this.ignoredTags) === -1 && nextNode.nodeName.search(this.blockTags) === -1) {
-                    if (nextTextNode.previousSibling) {
-                      if (nextTextNode.previousSibling.nodeName.search(this.spaceLikeTags) === -1) {
-                        nextTextNode.data = " ".concat(nextTextNode.data);
-                      }
-                    } else {
-                      if (!this.canIgnoreNode(nextTextNode)) {
-                        nextTextNode.data = " ".concat(nextTextNode.data);
-                      }
-                    }
-                  }
-                } else if (currentNode.nodeName.search(this.spaceSensitiveTags) === -1) {
-                  currentTextNode.data = "".concat(currentTextNode.data, " ");
-                } else {
-                  var panguSpace = document.createElement('pangu');
-                  panguSpace.innerHTML = ' ';
-
-                  if (nextNode.previousSibling) {
-                    if (nextNode.previousSibling.nodeName.search(this.spaceLikeTags) === -1) {
-                      nextNode.parentNode.insertBefore(panguSpace, nextNode);
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-                    nextNode.parentNode.insertBefore(panguSpace, nextNode);
-                  }
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-
-          nextTextNode = currentTextNode;
-        }
-      }
-    }, {
-      key: "spacingNode",
-      value: function spacingNode(contextNode) {
-        var xPathQuery = './/*/text()[normalize-space(.)]';
-
-        if (contextNode.children && contextNode.children.length === 0) {
-          xPathQuery = './/text()[normalize-space(.)]';
-        }
-
-        this.spacingNodeByXPath(xPathQuery, contextNode);
-      }
-    }, {
-      key: "spacingElementById",
-      value: function spacingElementById(idName) {
-        var xPathQuery = "id(\"".concat(idName, "\")//text()");
-        this.spacingNodeByXPath(xPathQuery, document);
-      }
-    }, {
-      key: "spacingElementByClassName",
-      value: function spacingElementByClassName(className) {
-        var xPathQuery = "//*[contains(concat(\" \", normalize-space(@class), \" \"), \"".concat(className, "\")]//text()");
-        this.spacingNodeByXPath(xPathQuery, document);
-      }
-    }, {
-      key: "spacingElementByTagName",
-      value: function spacingElementByTagName(tagName) {
-        var xPathQuery = "//".concat(tagName, "//text()");
-        this.spacingNodeByXPath(xPathQuery, document);
-      }
-    }, {
-      key: "spacingPageTitle",
-      value: function spacingPageTitle() {
-        var xPathQuery = '/html/head/title/text()';
-        this.spacingNodeByXPath(xPathQuery, document);
-      }
-    }, {
-      key: "spacingPageBody",
-      value: function spacingPageBody() {
-        var xPathQuery = '/html/body//*/text()[normalize-space(.)]';
-        ['script', 'style', 'textarea'].forEach(function (tag) {
-          xPathQuery = "".concat(xPathQuery, "[translate(name(..),\"ABCDEFGHIJKLMNOPQRSTUVWXYZ\",\"abcdefghijklmnopqrstuvwxyz\")!=\"").concat(tag, "\"]");
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-        this.spacingNodeByXPath(xPathQuery, document);
-      }
-    }, {
-      key: "spacingPage",
-      value: function spacingPage() {
-        this.spacingPageTitle();
-        this.spacingPageBody();
-      }
-    }, {
-      key: "autoSpacingPage",
-      value: function autoSpacingPage() {
-        var pageDelay = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 1000;
-        var nodeDelay = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 500;
-        var nodeMaxWait = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 2000;
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-        if (this.isAutoSpacingPageExecuted) {
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-        var self = this;
-        var onceSpacingPage = once(function () {
-          self.spacingPage();
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-        if (videos.length === 0) {
-          setTimeout(function () {
-            onceSpacingPage();
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-        } else {
-          for (var i = 0; i < videos.length; i++) {
-            var video = videos[i];
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-            if (video.readyState === 4) {
-              setTimeout(function () {
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-              break;
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-            video.addEventListener('loadeddata', function () {
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-        var queue = [];
-        var debouncedSpacingNodes = debounce(function () {
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-            if (node) {
-              self.spacingNode(node);
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-        var mutationObserver = new MutationObserver(function (mutations, observer) {
-          mutations.forEach(function (mutation) {
-            switch (mutation.type) {
-              case 'childList':
-                mutation.addedNodes.forEach(function (node) {
-                  if (node.nodeType === Node.ELEMENT_NODE) {
-                    queue.push(node);
-                  } else if (node.nodeType === Node.TEXT_NODE) {
-                    queue.push(node.parentNode);
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-              case 'characterData':
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-                if (node.nodeType === Node.TEXT_NODE) {
-                  queue.push(node.parentNode);
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-                break;
-
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-                break;
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-          debouncedSpacingNodes();
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-          characterData: true,
-          childList: true,
-          subtree: true
-        });
-      }
-    }]);
-
-    return BrowserPangu;
-  }(Pangu);
-
-  var pangu = new BrowserPangu();
-  module.exports = pangu;
-  module.exports["default"] = pangu;
-  module.exports.Pangu = BrowserPangu;
-});
-
-/***/ }),
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-  function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
-
-  var CJK = "\u2E80-\u2EFF\u2F00-\u2FDF\u3040-\u309F\u30A0-\u30FA\u30FC-\u30FF\u3100-\u312F\u3200-\u32FF\u3400-\u4DBF\u4E00-\u9FFF\uF900-\uFAFF";
-  var ANY_CJK = new RegExp("[".concat(CJK, "]"));
-  var SYMBOL_WIDE = '`~!@#$%*^&()/\\-+=<>?:"{}|,.;\'[\\]·~￥%——|\\\\';
-  var SYMBOL = '`~!@#$%^&()/\\-+=<>?:"{}|,.;\'[\\]·~￥%——|\\\\';
-  var SYMBOL_LEFT = '`~!@#$%^&(/\\-+=<>?:"{|,.;\'[·~￥%——|\\\\';
-  var SYMBOL_RIGHT = '`~!@#$%^&)/\\-+=<>?:"}|,.;\'\\]·~￥%——|\\\\';
-  var SYMBOL_SAFE = '`~!#$%^&/+=<>?:"|,;\'·~￥%——|\\\\';
-  var ALPHA_CJK = new RegExp("([A-Za-z_])([".concat(CJK, "]+)"), 'g');
-  var CJK_ALPHA = new RegExp("([".concat(CJK, "]+)([A-Za-z_])"), 'g');
-  var NUMBER_CJK = new RegExp("([0-9_])([".concat(CJK, "]+)"), 'g');
-  var CJK_NUMBER = new RegExp("([".concat(CJK, "]+)([0-9_])"), 'g');
-  var CJK_AND_ALPHA = new RegExp("([".concat(CJK, "]+)(&)([A-Za-z_])"), 'g');
-  var ALPHA_AND_CJK = new RegExp("([A-Za-z_])(&)([".concat(CJK, "]+)"), 'g');
-  var ALPHA_SYMBOL_CJK = new RegExp("([A-Za-z_])([".concat(SYMBOL_RIGHT, "])([").concat(CJK, "])"), 'g');
-  var CJK_SYMBOL_ALPHA = new RegExp("([".concat(CJK, "])([").concat(SYMBOL_LEFT, "])([A-Za-z_])"), 'g');
-  var NUMBER_SYMBOL_CJK = new RegExp("([0-9_])([".concat(SYMBOL, "])([").concat(CJK, "])"), 'g');
-  var CJK_SYMBOL_NUMBER = new RegExp("([".concat(CJK, "])([").concat(SYMBOL, "])([0-9_])"), 'g');
-  var CJK_BRACKET = new RegExp("([".concat(CJK, "])([<\\[{\\(])"), 'g');
-  var BRACKET_CJK = new RegExp("([>\\]\\)}])([".concat(CJK, "])"), 'g');
-  var ALPHA_NUMBER_CJK = new RegExp("([A-Za-z_])([0-9_])([".concat(CJK, "])"), 'g');
-  var CJK_SYMBOL_SYMBOL = new RegExp("([".concat(CJK, "])([").concat(SYMBOL_WIDE, "])([").concat(SYMBOL_WIDE, "])"), 'g');
-  var SYMBOL_SYMBOL_CJK = new RegExp("([".concat(SYMBOL_WIDE, "])([").concat(SYMBOL_WIDE, "])([").concat(CJK, "])"), 'g');
-  var CJK_SYMBOL_CJK_SYMBOL_CJK = new RegExp("([".concat(CJK, "])([").concat(SYMBOL_SAFE, "])([").concat(CJK, "])([").concat(SYMBOL_SAFE, "])([").concat(CJK, "])"), 'g');
-  var CJK_SYMBOL_CJK = new RegExp("([".concat(CJK, "])([").concat(SYMBOL_SAFE, "])([").concat(CJK, "])"), 'g');
-  var CJK_ACCOUNT_CJK = new RegExp("([".concat(CJK, "])(\\s*)(@[A-za-z0-9_]*)(\\s*)([").concat(CJK, "]+)(\\s*)([A-za-z0-9_]+)(\\s*)([").concat(CJK, "])"));
-
-  var Pangu = function () {
-    function Pangu() {
-      _classCallCheck(this, Pangu);
-
-      this.version = '1.0.0';
-    }
-
-    _createClass(Pangu, [{
-      key: "spacing",
-      value: function spacing(text) {
-        if (typeof text !== 'string') {
-          console.warn("spacing(text) only accepts string but got ".concat(_typeof(text)));
-          return text;
-        }
-
-        if (text.length <= 1 || !ANY_CJK.test(text)) {
-          return text;
-        }
-
-        var self = this;
-        var newText = text;
-        newText = newText.replace(ALPHA_NUMBER_CJK, '$1$2 $3');
-        newText = newText.replace(ALPHA_CJK, '$1 $2');
-        newText = newText.replace(CJK_ALPHA, '$1 $2');
-        newText = newText.replace(NUMBER_CJK, '$1 $2');
-        newText = newText.replace(CJK_NUMBER, '$1 $2');
-        newText = newText.replace(CJK_AND_ALPHA, '$1 $2 $3');
-        newText = newText.replace(ALPHA_AND_CJK, '$1 $2 $3');
-        newText = newText.replace(ALPHA_SYMBOL_CJK, '$1$2 $3');
-        newText = newText.replace(CJK_SYMBOL_ALPHA, '$1 $2$3');
-        newText = newText.replace(NUMBER_SYMBOL_CJK, '$1$2 $3');
-        newText = newText.replace(CJK_SYMBOL_NUMBER, '$1 $2$3');
-        newText = newText.replace(CJK_SYMBOL_SYMBOL, '$1 $2$3');
-        newText = newText.replace(SYMBOL_SYMBOL_CJK, '$1$2 $3');
-        newText = newText.replace(BRACKET_CJK, '$1 $2');
-        newText = newText.replace(CJK_BRACKET, '$1 $2');
-        newText = newText.replace(CJK_SYMBOL_CJK_SYMBOL_CJK, '$1 $2 $3 $4 $5');
-        newText = newText.replace(CJK_SYMBOL_CJK, '$1 $2 $3');
-        newText = newText.replace(CJK_ACCOUNT_CJK, '$1 $3$5$7 $9');
-        return newText;
-      }
-    }, {
-      key: "spacingText",
-      value: function spacingText(text) {
-        var callback = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function () {};
-        var newText;
-
-        try {
-          newText = this.spacing(text);
-        } catch (err) {
-          callback(err);
-          return;
-        }
-
-        callback(null, newText);
-      }
-    }, {
-      key: "spacingTextSync",
-      value: function spacingTextSync(text) {
-        return this.spacing(text);
-      }
-    }]);
-
-    return Pangu;
-  }();
-
-  var pangu = new Pangu();
-  module.exports = pangu;
-  module.exports["default"] = pangu;
-  module.exports.Pangu = Pangu;
-});
-
-/***/ })
-/******/ ]);
-});
\ No newline at end of file