Method on

packages/angular/ssr/src/hooks.ts:105–112

* Registers a new hook function under the specified hook name. * This function should be a function that takes an argument of type `T` and returns a `string` or `Promise `. * * @template Hook - The type of the hook name. It should be one of the keys of `HooksMapping`. * @param nam

(name: Hook, handler: HooksMapping[Hook])

   * ```
   */
  on<Hook extends HookName>(name: Hook, handler: HooksMapping[Hook]): void {
    const hooks = this.store.get(name);
    if (hooks) {
      hooks.push(handler);
    } else {
      this.store.set(name, [handler]);
    }
  }

  /**
   * Checks if there are any hooks registered under the specified name.