vscode/extensions/markdown-language-features/preview-src/loading.ts

31 lines
1.0 KiB
TypeScript

/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { postCommand } from './messaging';
export class StyleLoadingMonitor {
private unloadedStyles: string[] = [];
constructor() {
const onStyleLoadError = (event: any) => {
const source = event.target.dataset.source;
this.unloadedStyles.push(source);
};
window.addEventListener('DOMContentLoaded', () => {
for (const link of document.getElementsByClassName('code-user-style') as HTMLCollectionOf<HTMLElement>) {
if (link.dataset.source) {
link.onerror = onStyleLoadError;
}
}
});
window.addEventListener('load', () => {
if (!this.unloadedStyles.length) {
return;
}
postCommand('_markdown.onPreviewStyleLoadError', [this.unloadedStyles]);
});
}
}