Util.clone = function()

in packages/eui/scripts/jest/polyfills/mutation_observer.js [54:93]

• 29 lines of code
• 14 McCabe index (conditional complexity)

  Util.clone = function ($target, config) {
    var recurse = true; // set true so childList we'll always check the first level
    return (function copy($target) {
      var elestruct = {
        /** @type {Node} */
        node: $target,
        charData: null,
        attr: null,
        kids: null,
      };
      // Store current character data of target text or comment node if the config requests
      // those properties to be observed.
      if (config.charData && ($target.nodeType === 3 || $target.nodeType === 8)) {
        elestruct.charData = $target.nodeValue;
      }
      else {
        // Add attr only if subtree is specified or top level and avoid if
        // attributes is a document object (#13).
        if (config.attr && recurse && $target.nodeType === 1) {
          /**
           * clone live attribute list to an object structure {name: val}
           * @type {Object.<string, string>}
           */
          elestruct.attr = Util.reduce($target.attributes, function (memo, attr) {
            if (!config.afilter || config.afilter[attr.name]) {
              memo[attr.name] = attr.value;
            }
            return memo;
          }, {});
        }
        // whether we should iterate the children of $target node
        if (recurse && ((config.kids || config.charData) || (config.attr && config.descendents))) {
          /** @type {Array.<!Object>} : Array of custom clone */
          elestruct.kids = Util.map($target.childNodes, copy);
        }
        recurse = config.descendents;
      }
      return elestruct;
    })($target);
  };