XeNote/.yarn/unplugged/@ampproject-toolbox-optimizer-virtual-871245ee15/node_modules/@ampproject/toolbox-optimizer/lib/HtmlDomHelper.js
canburaks b23e3ff508 ...
2021-05-17 04:16:19 +03:00

52 lines
1.5 KiB
JavaScript

/**
* Copyright 2017 The AMP HTML Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
/**
* Finds and returns the first 'meta charset' element in the head.
*
* @param {Node} head the section to search for the meta charset node.
* @returns {Node} the '<meta charset>' node or null.
*/
function findMetaViewport(head) {
for (let node = head.firstChild; node !== null; node = node.nextSibling) {
if (node.tagName === 'meta' && node.attribs.name === 'viewport') {
return node;
}
}
return null;
}
/**
* Skips the subtree that is descending from the current node.
* @param {Node} the node that has its subtree being skipped
* @return {Node} the appropriate "next" node that will skip the current
* subtree.
*/
function skipNodeAndChildren(node) {
if (node.nextSibling) {
return node.nextSibling;
}
return skipNodeAndChildren(node.parent);
}
/** @module HtmlDomHelper */
module.exports = {
findMetaViewport: findMetaViewport,
skipNodeAndChildren: skipNodeAndChildren,
};