57 lines
2.2 KiB
JavaScript
57 lines
2.2 KiB
JavaScript
/**
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* Copyright 2020 Google LLC
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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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// @license © 2020 Google LLC. Licensed under the Apache License, Version 2.0.
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/**
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* Opens a file from disk using the legacy `<input type="file">` method.
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* @type { typeof import("../../index").fileOpen }
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*/
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export default async (options = {}) => {
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return new Promise((resolve, reject) => {
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const input = document.createElement('input');
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input.type = 'file';
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const accept = [
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...(options.mimeTypes ? options.mimeTypes : []),
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options.extensions ? options.extensions : [],
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].join();
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input.multiple = options.multiple || false;
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// Empty string allows everything.
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input.accept = accept || '';
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// ToDo: Remove this workaround once
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// https://github.com/whatwg/html/issues/6376 is specified and supported.
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const rejectOnPageInteraction = () => {
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window.removeEventListener('pointermove', rejectOnPageInteraction);
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window.removeEventListener('pointerdown', rejectOnPageInteraction);
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window.removeEventListener('keydown', rejectOnPageInteraction);
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reject(new DOMException('The user aborted a request.', 'AbortError'));
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};
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window.addEventListener('pointermove', rejectOnPageInteraction);
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window.addEventListener('pointerdown', rejectOnPageInteraction);
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window.addEventListener('keydown', rejectOnPageInteraction);
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input.addEventListener('change', () => {
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window.removeEventListener('pointermove', rejectOnPageInteraction);
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window.removeEventListener('pointerdown', rejectOnPageInteraction);
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window.removeEventListener('keydown', rejectOnPageInteraction);
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resolve(input.multiple ? input.files : input.files[0]);
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});
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input.click();
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});
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};
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