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alerts

Reports uses of the global alert/confirm/prompt dialog APIs.

✅ This rule is included in the browser logical presets.

The legacy browser dialog APIs alert, confirm, and prompt are synchronous, blocking, and provide a poor user experience in modern web applications. They should be avoided in production code in favor of non-blocking UI patterns (for example, custom modals) or other mechanisms for collecting user input or showing messages.

Examples

Section titled “Examples”
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Options

Section titled “Options”

This rule is not configurable.

When Not To Use It

Section titled “When Not To Use It”

If you’re writing quick temporary debugging snippets that never ship to users, or an internal-only page where the user experience does not matter, you might accept using alert/confirm/prompt locally. For production code and libraries, prefer non-blocking alternatives.

Further Reading

Section titled “Further Reading”

Equivalents in Other Linters

Section titled “Equivalents in Other Linters”