React TutorialLesson 29Free preview

React Forms

This lesson is part of React · All levels

Summary

Forms in React are generally written as controlled components, where the value of each input is stored at the state and is always synchronized via onChange. In doing so, React becomes a single source of truth for data forms. This pattern makes it easy to validate, display errors, and send data.

Key points

The input value is stored to the state through the useState hook
OnChange updates the state every time a user types
The attribute value follows the state so that the input becomes controlled
Uncontrolled component read the DOM value directly through the ref

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