How to call javascript function in react js?

Hi Friends 👋,

Welcome To aHoisting!

To call javascript function in react js, you can use onClick={sayHello}. It will call javascript function in react js.

Today, I am going to show you, how to call javascript function in react js.

Table of contents

• Install and create a new React app.
• Import react component.
• Create a Component.

Let’s start with the first step.

Step 1: Install and create a new React app.

First you have to install the React project. You should use create-react-app command to create a new React project.

npx create-react-app my-app
cd my-app
npm start

Step 2: Import react component.

After installing, you have to import your React component.

import React from 'react';

Step 3: Create a Component.

You can use onClick={sayHello} to call javascript function in react js.

<div>
  <button onClick={sayHello}>Click Me</button>
</div>

Call javascript function example.

The below code is an example of a React. You have to import react and set onClick={sayHello} to call javascript function in react js.

App.js

import React from 'react';

function sayHello() {
  alert('Hello!');
}

function App() {
  return (
    <div>
      <button onClick={sayHello}>Click Me</button>
    </div>
  );
}

export default App;

In the above code example, I have used the onClick={sayHello} to call javascript function in react js.

Check the output of the above code.

All the best 👍