Sometimes, we want to set the height of a text area dynamically with JavaScript and React.

In this article, we’ll look at how to set the height of a text area dynamically with JavaScript and React.

How to set the height of a text area dynamically with JavaScript and React?

To set the height of a text area dynamically with JavaScript and React, we can set the height of the text area when we type into it.

For instance, we write:

import React from "react";

export default function App() {
  const handleKeyDown = (e) => {
    e.target.style.height = "inherit";
    e.target.style.height = `${e.target.scrollHeight}px`;
  };

  return <textarea onKeyDown={handleKeyDown} />;
}

to set the onKeyDown prop to the handleKeyDown function.

In it, we set the height of the text area to the e.target.scrollHeight, which is the height of the scrollable area.

As a result, the height of the text area should change to show all the text as we type into it.

Conclusion

To set the height of a text area dynamically with JavaScript and React, we can set the height of the text area when we type into it.