Method flash

src/session.ts:408–416

(key: string | SessionData, value?: AllowedSessionValues)

  flash(key: string, value: AllowedSessionValues): void
  flash(keyValue: SessionData): void
  flash(key: string | SessionData, value?: AllowedSessionValues): void {
    if (typeof key === 'string') {
      if (value && this.shouldFlashValue(value)) {
        this.#getFlashStore('write').set(key, value)
      }
    } else {
      this.#getFlashStore('write').merge(this.cleanupFlashData(key))
    }
  }

  /**
   * Flashes errors to the errorsBag. You can read these errors via the "@error" tag.