Can't type in React input text field

Question

I\'m trying my first bit of React.js and am stumped early on... I have the code below, which renders a search form into

. B

Answer 1

For me the following simple change worked perfectly

 setTxtLetter(event.target.value)} /> {/* does not work */}

change... value={myPropVal} to... defaultValue={myPropVal}

 setTxtLetter(event.target.value)} /> {/* Works!! */}