45 lines
1.5 KiB
TypeScript
45 lines
1.5 KiB
TypeScript
/*************************************************************
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*
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* Copyright (c) 2017-2022 The MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Implements asynchronous loading of files
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*
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* @author dpvc@mathjax.org (Davide Cervone)
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*/
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import {mathjax} from '../mathjax.js';
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/**
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* Load a file asynchronously using the mathjax.asynchLoad method, if there is one
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*
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* @param {string} name The name of the file to load
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* @return {Promise} The promise that is satisfied when the file is loaded
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*/
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export function asyncLoad(name: string): Promise<void> {
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if (!mathjax.asyncLoad) {
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return Promise.reject(`Can't load '${name}': No asyncLoad method specified`);
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}
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return new Promise((ok, fail) => {
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const result = mathjax.asyncLoad(name);
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if (result instanceof Promise) {
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result.then((value: any) => ok(value)).catch((err: Error) => fail(err));
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} else {
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ok(result);
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}
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});
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}
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