41 lines
1.2 KiB
JavaScript
41 lines
1.2 KiB
JavaScript
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import { HtmlStream } from '~/streaming/html_stream';
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async function pipeStreams(domWriter, streamPromises) {
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try {
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for await (const stream of streamPromises.slice(0, -1)) {
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await stream.pipeTo(domWriter, { preventClose: true });
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}
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const stream = await streamPromises[streamPromises.length - 1];
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await stream.pipeTo(domWriter);
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} catch (error) {
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domWriter.abort(error);
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}
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}
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// this function (and the rest of the pipeline) expects polyfilled streams
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// do not pass native streams here unless our browser support allows for it
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// TODO: remove this notice when our WebStreams API support reaches 100%
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export function renderHtmlStreams(streamPromises, element, config) {
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if (streamPromises.length === 0) return Promise.resolve();
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const chunkedHtmlStream = new HtmlStream(element).withChunkWriter(config);
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return new Promise((resolve, reject) => {
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const domWriter = new WritableStream({
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write(chunk) {
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return chunkedHtmlStream.write(chunk);
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},
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close() {
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chunkedHtmlStream.close();
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resolve();
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},
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abort(error) {
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chunkedHtmlStream.abort();
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reject(error);
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},
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});
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pipeStreams(domWriter, streamPromises);
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});
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}
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