[READ-ONLY] Mirror of https://github.com/bombshell-dev/clack. Effortlessly build beautiful command-line apps
bomb.sh/docs/clack/basics/getting-started/
cli
command-line
command-line-app
node
prompt
prompts
[ci] format
authored by
Florian Lefebvre
and committed by
bombshell-bot
(May 28, 2026, 4:12 PM UTC)
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packages/core/src/utils/validation.ts
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packages/core/src/utils/validation.ts
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* A function or [Standard Schema](https://github.com/standard-schema/standard-schema)
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* that validates user input. If a custom function is given, you should return a
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* `string` or `Error` to show as a validation error, or `undefined` to accept the result.
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*
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*
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* @example Using arktype
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* ```ts
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* import { text } from '@clack/prompts';
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* import { type } from 'arktype';
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*
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*
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* const name = await text({
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* message: 'Enter your name (letters only)',
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* validate: type('string.alpha').describe('Name can only contain letters'),
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* @example Custom validator
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* ```ts
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* import { text } from '@clack/prompts';
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*
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*
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* const age = await text({
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* message: 'Enter your age:',
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* validate(value) {