How to allow only alphabets in Input Field in Javascript

<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
  </head>

const App = () => {
        const [inputValue, setInputValue] = useState("");

const handleChange = (event) => {
          const regex = /^[A-Za-z]+$/; // Regular expression to allow only alphabets
          const { value } = event.target;

if (regex.test(value) || value === "") {
            setInputValue(value);
          }
        };

return (
          <div className="container">
            <h3>React Js input field allow only alphabets </h3>
            <input
              type="text"
              value={inputValue}
              onChange={handleChange}
              placeholder="Enter alphabets only"
            />
          </div>
        );
      };

ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
      .container {
        margin: 0 auto;
        width: 600px;
        text-align: center;
        box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12),
          0 2px 4px 0 rgba(0, 0, 0, 0.24);
        padding: 20px;
      }
      h3 {
        font-size: 24px;
        margin-bottom: 10px;
      }

input {
        padding: 10px;
        font-size: 16px;
        border: 1px solid #ccc;
        border-radius: 5px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        width: 300px;
      }

input:focus {
        outline: none;
        border-color: #61dafb;
  
      }
    </style>
  </body>
</html>

 
<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
  </head>
​
  <body>
    <div id="app"></div>
​
    <script type="text/babel">
      const { useState } = React;
​
      const App = () => {
        const [inputValue, setInputValue] = useState("");
​
        const handleChange = (event) => {
          const regex = /^[A-Za-z]+$/; // Regular expression to allow only alphabets
          const { value } = event.target;
​
          if (regex.test(value) || value === "") {
            setInputValue(value);
          }
        };
​
        return (
          <div className="container">
            <h3>React Js input field allow only alphabets </h3>
            <input
              type="text"
              value={inputValue}
              onChange={handleChange}
              placeholder="Enter alphabets only"
            />
          </div>
        );
      };
​
      ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
      .container {
        margin: 0 auto;
        width: 600px;
        text-align: center;
        box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12),
          0 2px 4px 0 rgba(0, 0, 0, 0.24);
        padding: 20px;
      }
      h3 {
        font-size: 24px;
        margin-bottom: 10px;
      }
​
      input {
        padding: 10px;
        font-size: 16px;
        border: 1px solid #ccc;
        border-radius: 5px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        width: 300px;
      }
​
      input:focus {
        outline: none;
        border-color: #61dafb;
  
      }
    </style>
  </body>
</html>
​