Function flushCompletedChunks

packages/react-server/src/ReactFlightServer.js:5850–6004

(request: Request)

}

function flushCompletedChunks(request: Request): void {
  if (__DEV__ && request.debugDestination !== null) {
    const debugDestination = request.debugDestination;
    beginWriting(debugDestination);
    try {
      const debugChunks = request.completedDebugChunks;
      let i = 0;
      for (; i < debugChunks.length; i++) {
        request.pendingDebugChunks--;
        const chunk = debugChunks[i];
        writeChunkAndReturn(debugDestination, chunk);
      }
      debugChunks.splice(0, i);
    } finally {
      completeWriting(debugDestination);
    }
    flushBuffered(debugDestination);
  }
  const destination = request.destination;
  if (destination !== null) {
    beginWriting(destination);
    try {
      // We emit module chunks first in the stream so that
      // they can be preloaded as early as possible.
      const importsChunks = request.completedImportChunks;
      let i = 0;
      for (; i < importsChunks.length; i++) {
        request.pendingChunks--;
        const chunk = importsChunks[i];
        const keepWriting: boolean = writeChunkAndReturn(destination, chunk);
        if (!keepWriting) {
          request.destination = null;
          i++;
          break;
        }
      }
      importsChunks.splice(0, i);

      // Next comes hints.
      const hintChunks = request.completedHintChunks;
      i = 0;
      for (; i < hintChunks.length; i++) {
        const chunk = hintChunks[i];
        const keepWriting: boolean = writeChunkAndReturn(destination, chunk);
        if (!keepWriting) {
          request.destination = null;
          i++;
          break;
        }
      }
      hintChunks.splice(0, i);

      // Debug meta data comes before the model data because it will often end up blocking the model from
      // completing since the JSX will reference the debug data.
      if (__DEV__ && request.debugDestination === null) {
        const debugChunks = request.completedDebugChunks;
        i = 0;
        for (; i < debugChunks.length; i++) {