How to render a boolean value in React JSX

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How to render a boolean value in React JSX

Author：JIYIK Last Updated：2025/03/16 Views：

In React, we use String()the function to render Boolean values in JSX, for example <h2>{字符串(bool1)}</h2>. By default, Boolean values don't render anything in React, so we have to convert the value to a string in order to render it.

export default function App() {
  const bool1 = true;

  const bool2 = false;

  return (
    <div>
      <h2>bool1: {String(bool1)}</h2>

      <hr />

      <h2>bool2: {String(bool2)}</h2>
    </div>
  );
}

Rendering a Boolean value in React JSX

We have to convert the boolean values to strings in order to display them in our JSX code.

Ignore boolean values, null and undefined . They are not rendered at all.

None of the following JSX expressions render anything.

<div />

<div></div>

<div>{false}</div>

<div>{null}</div>

<div>{undefined}</div>

<div>{true}</div>

Alternatively, we can use the method on a Boolean value toString()to convert it to a string.

export default function App() {
  const bool1 = true;

  const bool2 = false;

  return (
    <div>
      <h2>bool1: {bool1.toString()}</h2>

      <hr />

      <h2>bool2: {bool2.toString()}</h2>
    </div>
  );
}

Boolean.toString()Method returns a string representation of a Boolean value.

Another common approach is to use template literals to convert boolean values to strings.

export default function App() {
  const bool1 = true;

  const bool2 = false;

  return (
    <div>
      <h2>{`bool1: ${bool1}`}</h2>

      <hr />

      <h2>{`bool2: ${bool2}`}</h2>
    </div>
  );
}

We use template literals to insert a boolean variable into a string.

请注意, the string is enclosed in backticks `` instead of single quotes.

The dollar sign and curly brace syntax allows us to use placeholders that are evaluated.

By default, template literals concatenate the parts into a single string.

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