Alert
An inline banner for a warning, error, info, or success message.
alert is an inline message with a colored background and an icon that matches its level. Slack
only accepts it inside modals, so use it for validation feedback or a heads-up in a form.
My App
The work is mysterious and important.
Default level, set in plain text.
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Fields
PropType
typestring
Always `alert`.
Type
stringtext?PlainTextElement | MrkdwnElement
The message. Supports the same `plain_text` and `mrkdwn` text objects as a section.
Type
PlainTextElement | MrkdwnElementlevel?"default" | "info" | "warning" | "error" | "success"
The banner color and icon. An unrecognized or omitted value falls back to `default`.
Type
"default" | "info" | "warning" | "error" | "success"Default
"default"Examples
Every level
The preview above shows all five: default, info, warning, error, and success. The error
level is announced to assistive technology as an alert; the others as a status update.
Long text
My App
A longer alert wraps onto more than one line, to show how the icon lines up with the first line of text and how the box grows with its content.
The icon stays aligned with the first line as the text wraps, and the banner grows to fit the content.