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How to check if a variable is a string in React JS?

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< 1 min read

In ReactJS, checking if a variable is a string is not specific to React itself but is a basic JavaScript operation. You can use the typeof operator to determine the data type of a variable. Here’s how you can check if a variable is a string:

import React from 'react';

class StringCheck extends React.Component {
  render() {
    const variable = 'Hello, world!'; // The variable you want to check

    const isString = typeof variable === 'string';

    return (
      <div>
        <p>Is Variable a String: {isString ? 'Yes' : 'No'}</p>
      </div>
    );
  }
}

export default StringCheck;

In this example, the typeof operator is used to check if the variable is of type 'string'. The result of the comparison is assigned to the isString variable, which is then used to display whether the variable is a string or not.

This approach works for any JavaScript code, not just within React components.

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