Function BOMSniffing

github-actions/saucelabs/set-saucelabs-env.js:15425–15435

(ioQueue)

        }))();
      }
      function fireAProgressEvent(e, reader) {
        const event = new ProgressEvent(e, {
          bubbles: false,
          cancelable: false
        });
        reader.dispatchEvent(event);
      }
      function packageData(bytes, type, mimeType, encodingName) {
        switch (type) {
          case "DataURL": {
            let dataURL = "data:";
            const parsed = parseMIMEType(mimeType || "application/octet-stream");
            if (parsed !== "failure") {
              dataURL += serializeAMimeType(parsed);