@servicenow/ui-renderer-snabbdom/lib/onDisconnect.js

Snabbdom renderer for UI Framework on Next Experience

/**
 * Copyright (c) 2020 ServiceNow, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *  
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *  
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = onDisconnect;

var _utils = require("./utils");

var _symbols = require("./symbols");

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/**
 * Patches an empty tree to a container so we run hooks and cleanup
 * @param {HTMLElement} element Element being disconnected
 * @param {Function} [dispatch] function contextualized to the element
 * @param {Function} [next] function to call after disconnect
 */
function onDisconnect(element, dispatch) {
  var next = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : function () {
    return null;
  };
  var prev = element[_symbols.VNODE];
  var styles = [];
  var children = prev.children;
  var childrenCount = children.length;

  for (var i = 0; i < childrenCount; i++) {
    var child = children[i];
    if (child && typeof child.sel === 'string' && (child.sel.startsWith('style') || child.sel.startsWith('link'))) styles.push(child);
  }

  var nextEl = _objectSpread(_objectSpread({}, prev), {}, {
    children: styles
  });

  (0, _utils.patch)(prev, nextEl, {
    disconnect: true
  });
  delete element[_symbols.VNODE]; // eslint-disable-line no-param-reassign

  next();
}
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