Adding a key prop to a Fragment in React

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A few days ago I've had the following situation:

{items.map((e, k) => {
        return (
          <React.Fragment key={k}>
            <h2>{e}</h2>
          </React.Fragment>
        );
})}

Therefore needed to add a key property to the React fragment <>.

With the above syntax, I don't think it is possible.

But, if we are using the verbose syntax of React.Fragment this can easily be done:

const animals = ['šŸˆ Cat', 'šŸ¶ Dog', 'šŸ® Cow'];
return (
    <>
      {animals.map((e, k) => {
        return (
          <React.Fragment key={k}>
            <h2>{e}</h2>
          </React.Fragment>
        );
      })}
    </>
  );

Made this codepen for a test.

šŸ“– Neural networks for Javascript developers

The Neural Networks for JavaScript developers book is almost ready! Learn the basics of AI with TensorFlowJs examples. Join now the presale and get a 15$ coupon off the launching price!


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