blob: 95e994fae95f71cac782df37407375ee0e03e9b8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
/**
@license
Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
*/
'use strict';
/** @type {!Set<string>} */
const styleTextSet = new Set();
export const scopingAttribute = 'shady-unscoped';
/**
* Add a specifically-marked style to the document directly, and only one copy of that style.
*
* @param {!HTMLStyleElement} style
* @return {undefined}
*/
export function processUnscopedStyle(style) {
const text = style.textContent;
if (!styleTextSet.has(text)) {
styleTextSet.add(text);
const newStyle = style.cloneNode(true);
document.head.appendChild(newStyle);
}
}
/**
* Check if a style is supposed to be unscoped
* @param {!HTMLStyleElement} style
* @return {boolean} true if the style has the unscoping attribute
*/
export function isUnscopedStyle(style) {
return style.hasAttribute(scopingAttribute);
}
|
