Kyle Shevlin • 8/20/2024

Never Call <code>new Date()</code> Inside Your Components

The article argues against using impure functions like new Date() inside React components, especially for setting initial state, as it creates unpredictable behavior and flaky visual regression tests. It demonstrates the problem with a date input example and provides a solution: passing the date as a prop (or using default parameters) to make components pure and easily testable with static values.

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#React #testing #state management