Button list

{
  "buttons": [
    {
      object (Button)
    }
  ]
}

object (Button)

An array of buttons.

{
  "text": string,
  "icon": {
    object (Icon)
  },
  "color": {
    object (Color)
  },
  "onClick": {
    object (OnClick)
  },
  "disabled": boolean,
  "altText": string
}

string

The text displayed inside the button.

object (Icon)

The icon image. If both icon and text are set, then the icon appears before the text.

object (Color)

If set, the button is filled with a solid background color and the font color changes to maintain contrast with the background color. For example, setting a blue background likely results in white text.

If unset, the image background is white and the font color is blue.

For red, green, and blue, the value of each field is a float number that you can express in either of two ways: as a number between 0 and 255 divided by 255 (153/255), or as a value between 0 and 1 (0.6). 0 represents the absence of a color and 1 or 255/255 represent the full presence of that color on the RGB scale.

Optionally set alpha, which sets a level of transparency using this equation:

pixel color = alpha * (this color) + (1.0 - alpha) * (background color)

For alpha, a value of 1 corresponds with a solid color, and a value of 0 corresponds with a completely transparent color.

For example, the following color represents a half transparent red:

"color": {
   "red": 1,
   "green": 0,
   "blue": 0,
   "alpha": 0.5
}

object (OnClick)

Required. The action to perform when a user clicks the button, such as opening a hyperlink or running a custom function.

boolean

If true, the button is displayed in an inactive state and doesn't respond to user actions.

string

The alternative text that's used for accessibility.

Set descriptive text that lets users know what the button does. For example, if a button opens a hyperlink, you might write: "Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat".

{
  "altText": string,
  "imageType": enum (ImageType),

  // Union field icons can be only one of the following:
  "knownIcon": string,
  "iconUrl": string
  // End of list of possible types for union field icons.
}

string

Optional. A description of the icon used for accessibility. If unspecified, the default value Button is provided. As a best practice, you should set a helpful description for what the icon displays, and if applicable, what it does. For example, A user's account portrait, or Opens a new browser tab and navigates to the Google Chat developer documentation at https://developers.google.com/chat.

If the icon is set in a Button, the altText appears as helper text when the user hovers over the button. However, if the button also sets text, the icon's altText is ignored.

enum (ImageType)

The crop style applied to the image. In some cases, applying a CIRCLE crop causes the image to be drawn larger than a built-in icon.

string

Display one of the built-in icons provided by Google Workspace.

For example, to display an airplane icon, specify AIRPLANE. For a bus, specify BUS.

For a full list of supported icons, see built-in icons.

string

Display a custom icon hosted at an HTTPS URL.

For example:

"iconUrl":
"https://developers.google.com/chat/images/quickstart-app-avatar.png"

Supported file types include .png and .jpg.

{
  "red": number,
  "green": number,
  "blue": number,
  "alpha": number
}

number

The amount of red in the color as a value in the interval [0, 1].

number

The amount of green in the color as a value in the interval [0, 1].

number

The amount of blue in the color as a value in the interval [0, 1].

number

The fraction of this color that should be applied to the pixel. That is, the final pixel color is defined by the equation:

pixel color = alpha * (this color) + (1.0 - alpha) * (background color)

This means that a value of 1.0 corresponds to a solid color, whereas a value of 0.0 corresponds to a completely transparent color. This uses a wrapper message rather than a simple float scalar so that it is possible to distinguish between a default value and the value being unset. If omitted, this color object is rendered as a solid color (as if the alpha value had been explicitly given a value of 1.0).

{

  // Union field data can be only one of the following:
  "action": {
    object (Action)
  },
  "openLink": {
    object (OpenLink)
  },
  "openDynamicLinkAction": {
    object (Action)
  },
  "card": {
    object (Card)
  }
  // End of list of possible types for union field data.
}

object (Action)

If specified, an action is triggered by this onClick.

object (OpenLink)

If specified, this onClick triggers an open link action.

object (Action)

An add-on triggers this action when the action needs to open a link. This differs from the openLink above in that this needs to talk to server to get the link. Thus some preparation work is required for web client to do before the open link action response comes back. Supported by Google Workspace Add-ons, but not Google Chat apps.

object (Card)

A new card is pushed to the card stack after clicking if specified.

Supported by Google Workspace Add-ons, but not Google Chat apps.