Brainsteam

Content tagged with "Javascript"

Async Promise Constructors

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#nodejs #typescript #javascript #softeng

I ran into an interesting typescript/js problem yesterday at work.

The following code snippet was generating an error and a stack trace that was never being propagated up to the caller:

return new Promise(async (resolve, reject) => {
  const data = await this.client.getObject(bucket, path);

  const buf: any[] = [];

  data.on("data", (data) => {
    buf.push(data);
  });

  data.on("error", (err) => {
    reject(err);
  });

  data.on("end", () => {
    resolve(JSON.parse(Buffer.concat(buf).toString()));
  });
});
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