lit-html/lib/directive.js

HTML template literals in JavaScript

/**
 * @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
 */
const directives = new WeakMap();
export const directive = (f) => {
    directives.set(f, true);
    return f;
};
export const isDirective = (o) => typeof o === 'function' && directives.has(o);
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