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To set a default value for an input element in React: Pass the default value as a parameter to the useState hook for controlled fields. Set the defaultValue prop on uncontrolled input fields.

Step 1: Create a new React Project. We need to create a new React Project.Step 2: Install npm dependency.Step 3: Create a new form component & Include Select for dropdown.Step 4: Write dropdown options in constant.Step 5: Update App.js.Step 6: Run the ReactJS application.

You can use react useState() hook to update the value of any variable and you can use the new destructuring functionality of js.

To set a default value for the color prop, use the defaultProps property of CustomButton to set the default value of color to blue . Notice that whenever you don't pass the color prop to CustomButton , it will fall back to the blue default prop value.

Add the method submitAndClear to our class and set the <button /> component's onPress prop to this. submitAndClear. Change the <button /> component's title prop to the string 'Submit' Add the prop clearButtonMode='always' to the <TextInput /> component ? this will give us an option to clear the text at any time.

TextInput is a Core Component that allows the user to enter text. It has an onChangeText prop that takes a function to be called every time the text changed, and an onSubmitEditing prop that takes a function to be called when the text is submitted.

TextInput is a Core Component that allows the user to enter text. It has an onChangeText prop that takes a function to be called every time the text changed, and an onSubmitEditing prop that takes a function to be called when the text is submitted.