React Js Convert All Array Element to Lowercase

React Js Convert All Array Element to Lowercase:In React JS, you can easily convert all elements of an array to lowercase using state management and the map function. In this tutorial, we will walk you through a simple example of a React component that takes an array and converts all its elements to lowercase. This tutorial assumes you have a basic understanding of React JS.

written

reviewed

updated

 <script type="text/babel">
    const { useState } = React;
    function App() {
      const [originalArray, setOriginalArray] = useState(["Hello", "World", "React", "JS"]);
      const convertArrayToLowerCase = () => {
        const lowercaseArray = originalArray.map(item => item.toLowerCase());
        setOriginalArray(lowercaseArray);
      };

      return (
        <div className='container'>
          <h2>React Js Array Element to Lowercase</h2>
          <button onClick={convertArrayToLowerCase}>Convert to Lowercase</button>
          <p>{JSON.stringify(originalArray)}</p>

        </div>
      );
    }

    ReactDOM.render(<App />, document.getElementById("app"));
  </script>

Run

Setting Up the React Component

Firstly, let's set up a basic React component. In the provided code snippet, we have a functional component named App. It initializes a state variable originalArray containing an array of strings: ["Hello", "World", "React", "JS"]

const { useState } = React;
function App() {
  const [originalArray, setOriginalArray] = useState(["Hello", "World", "React", "JS"]);
  // ...
}

Converting Array Elements to Lowercase

To convert all elements of originalArray to lowercase, we utilize the map function. Inside the convertArrayToLowerCase function, each element of the array is transformed to lowercase, and the updated array is set back to the state using the setOriginalArray function.

const convertArrayToLowerCase = () => {
  const lowercaseArray = originalArray.map(item => item.toLowerCase());
  setOriginalArray(lowercaseArray);
};

Implementing the User Interface

In the UI, there is a button labeled "Convert to Lowercase." When this button is clicked, the convertArrayToLowerCase function is invoked, triggering the array transformation process. The updated array is displayed below the button in JSON format

return (
  <div className='container'>
    <h2>React JS Array Element to Lowercase</h2>
    <button onClick={convertArrayToLowerCase}>Convert to Lowercase</button>
    <p>{JSON.stringify(originalArray)}</p>
  </div>
);

After clicking the button, the output displayed on the webpage will be the lowercase version of the original array:

Output of Example

["hello", "world", "react", "js"]

Pasted Image

Conclusion

In React JS, you can easily convert all elements of an array to lowercase using state management and the map function. In this tutorial, we will walk you through a simple example of a React component that takes an array and converts all its elements to lowercase. This tutorial assumes you have a basic understanding of React JS.