如何通过card JSON在Hangouts Chat中实现carousel cards及内嵌input field？

Hey there! Let's break down your question about adding input fields to carousel cards in Hangouts Chat using the card JSON schema.

First: Yes, You Can Create Carousel Cards with JSON #

Hangouts Chat fully supports carousel cards through its native JSON schema, using the cardsV2 structure (the newer, recommended implementation). Each card in the carousel is a standard card object, so you can include headers, text, buttons, and other supported widgets across multiple swipable cards.

The Catch: No Direct Input Fields in JSON Carousel Cards #

Unfortunately, the native Hangouts Chat card JSON schema doesn't include a dedicated free-form text input component that you can embed directly inside carousel cards. The interactive widgets available for JSON cards are limited to:

• Buttons (action, text, image variants)
• Selection menus (dropdowns, multi-select options)
• Date pickers
• Toggle switches

Free-form text inputs aren't part of this native set—you mentioned you can build this with pure HTML/CSS (using the html field in a card), but that's a separate approach that bypasses the native JSON widget system.

A Workaround: Button-Triggered Input Prompts #

If you need to collect user input alongside your carousel content, a practical workaround is to add a button to one of your carousel cards that triggers a follow-up message with a standalone input field. Here's a quick example of what the carousel card JSON might look like:

{
  "cardsV2": [
    {
      "cardId": "carousel-feedback-card",
      "card": {
        "header": {
          "title": "Share Your Feedback"
        },
        "sections": [
          {
            "widgets": [
              {
                "textParagraph": {
                  "text": "Got thoughts on our product? Click below to leave a comment!"
                }
              },
              {
                "buttonList": {
                  "buttons": [
                    {
                      "text": "Submit Comment",
                      "onClick": {
                        "action": {
                          "function": "openFeedbackInput",
                          "parameters": []
                        }
                      }
                    }
                  ]
                }
              }
            ]
          }
        ]
      }
    }
  ]
}

When the user clicks the button, your bot can send a follow-up message that includes a dedicated input field using the input component in the message payload. This input won't live inside the carousel, but it's a seamless way to collect text after showcasing your carousel content.

Wrapping Up #

To sum it up:

• You can absolutely build carousel cards using Hangouts Chat's JSON schema
• Directly embedding input fields in those carousel cards isn't supported natively
• Use either your existing HTML/CSS approach, or a button-triggered follow-up input prompt as a JSON-compatible workaround

内容的提问来源于stack exchange，提问作者kiran reddy