Method registerInitProgressCallback

web/src/runtime.ts:1195–1197

* Register a call back for fetch progress. * * @param cb the fetch progress callback.

(cb: InitProgressCallback)

   * @param cb the fetch progress callback.
   */
  registerInitProgressCallback(cb: InitProgressCallback) {
    this.initProgressCallback.push(cb);
  }

  /**
   * Get parameters in the form of prefix_i