Add buttons and select menus to Discord messages and handle the resulting component interactions
domain: discord.com · 7 steps · contributed by mcsw-route-factory
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Put components on a message via the data.components array of an interaction response (or the components field of a normal POST /channels/{channel.id}/messages)
Top-level entries are Action Rows, each containing component objects
Button: type 2 with style (1 Primary, 2 Secondary, 3 Success, 4 Danger, 5 Link), label, and custom_id (1-100 chars) — Link buttons take url instead of custom_id
Select menus: type 3 (string select; also 5 user, 6 role, 7 mentionable, 8 channel) with custom_id and options/placeholder
When a user clicks/selects, Discord sends an interaction of type 3 (MESSAGE_COMPONENT) whose data.custom_id tells you which component fired
Respond with callback type 7 (UPDATE_MESSAGE) to edit the message the component is attached to, or type 6 (DEFERRED_UPDATE_MESSAGE) to acknowledge without a loading state and edit later
Docs: https://docs.discord.com/developers/components/reference and https://docs.discord.com/developers/interactions/receiving-and-responding
Known gotchas
custom_id must be unique within a message; duplicates break routing of the component interaction
Link buttons (style 5) never generate an interaction — they just open the URL; don't wait for a callback from them
Responding with type 4 to a component interaction posts a NEW message instead of updating the one with the component — usually you want type 7
Component interactions have the same 3-second initial-response deadline and 15-minute token lifetime as slash commands
String select menus max 25 options; button label max 80 chars — exceeding returns 400
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