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Reference: Block Kit

Block Kit is made up of many atomic building blocks. Follow these field guides down the rabbit hole to build the perfect Block Kit burrow for your app.

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Block Kit components

There is a simple hierarchy to the library of Block Kit components:

Blocks

  • Actions A block that is used to hold multiple interactive elements.
  • Context Used for contextual info, which can include both images and text.
  • Divider A content divider used to visually separate pieces of info inside of a message.
  • File Used with remote files to display info about the attached files.
  • Header A larger-sized text block used as a header.
  • Image A simple image block, designed to make those cat photos really pop.
  • Input A block that collects information from users in a multitude of ways.
  • Section Display text or combine text with interactive elements and images.

Elements

  • Button A button that can be a trigger for anything from opening a simple link to starting a complex workflow.
  • Checkboxes A checkbox group that allows a user to choose multiple items from a list of possible options.
  • Date picker An element which lets users easily select a date from a calendar style UI.
  • Image An element to insert an image as part of a larger block of content.
  • Multi-select menu A multi-select menu allows a user to select multiple items from a list of options.
  • Overflow menu A cross between a button and a select menu - a button that shows a list of options when clicked.
  • Plain-text input Creates a single or multi-line field where a user can enter freeform text data.
  • Radio button group A radio button group that allows a user to choose one item from a list of possible options.
  • Select menus Creates a drop down menu with a list of options for a user to choose.

Composition objects

  • Text Defines text for many different blocks and elements.
  • Confirmation dialog Provides a dialog that adds a confirmation step to interactive elements.
  • Option Represents a single item in a number of item selection elements.
  • Option group Used to group option objects in select menus.
  • Conversation filters Provides a way to filter the list of options in conversation selector menus.
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