React JS Sticky Fixed Header using On Scroll Event Handler

In this tutorial, we will discuss how to implement the On Scroll event handler in React Js application to implement fixed top header. We will deploy the useLayoutEffect hook of functional components to freeze the header content.

The fixed header is used to display the application branding or other content in the same place even if the user scrolls the content. A sticky header is usually placed at the top of a website or application.

To implement the onScroll event in React Js we will use the useLayoutEffect hook of functional components.

How to use OnScroll Event in React JS  Create Fixed Header

Step 1 – Create React Application

Step 2 – Make FixedHeader Component

Step 3 – Add Sticky Header Style

Step 4 – Import FixedHeader Component

Step 5 – See In Action


Step 1 – Create React Application

First, make sure you have installed the create react app in your system:

npm install create-react-app --global


Next, you can create a new React js application by executing the below npx command:

npx create-react-app react-app


Thereafter move into the app directory and open in your favourite IDE like VS Code:

cd react-app

code .

Step 2 – Make FixedHeader Component

Now head towards the src folder and create a components folder with a file named Fixedheader.js

Update the src/components/Fixedheader.js file with the following code in it:

import React, { useRef, useLayoutEffect } from "react";
function Fixedheader() {
  const stickyHeader = useRef();
  useLayoutEffect(() => {
    const topHeader = document.getElementById("topHeader");
    let fixedTop = stickyHeader.current.offsetTop;
    const fixedHeader = () => {
      if (window.pageYOffset > fixedTop) {
      } else {
    window.addEventListener("scroll", fixedHeader);
  }, []);
  return (
      <div className="topHeader" id="topHeader" ref={stickyHeader}>
        <h2>React Fixed Header</h2>
      <div className="content-wrapper">
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export default Fixedheader;

We are taking the reference of the element with id=”mainHeader” then getting the offsetTop using the ‘scroll’ event bound to the window object.

Why deploy useLayoutEffect() hook?

The important thing to notice that ‘scroll’ event return error message “Cannot read property ‘offsetTop’ of null” because the id=’mainHeader’ element is not yet rendered inside the DOM.

To fix this we need to execute the window ‘scroll’ event handler inside the useLayoutEffect hook. This hook is executed only after the complete DOM is rendered in the view to get the offsetTop value.


Step 3 – Add Sticky Header Style

The sticky header feature is implemented by adding a custom class ‘fixedTop’ on checking if user scroll to the bottom or at the top. So we will be adding the following CSS style to freeze out fixed header.

Open the App.css file and append following style in it:

.topHeader {
  padding: 12px 18px;
  background: rgb(0 0 0);
  color: #fff;
  text-align: center;

.content-wrapper {
  padding: 16px;
  max-width: 900px;
  margin: 0 auto;
  font-size: 18px;

.fixedTop {
  width: 100%;
  padding: 12px 18px;
  position: fixed;
  top: 0;
  background: rgb(255 226 0);

.fixedTop+.content-wrapper {
  padding-top: 102px;


Step 4 – Import FixedHeader Component

Finally, we need to import the FixedHeader component in the main App component. Update the App.js file with following code:

import "./App.css";
import React from "react";
import Fixedheader from "./components/Fixedheader";
function App() {
  return (
      <Fixedheader />
export default App;


Step 5 – See In Action

Now, you can run the React js application to see the Sticky Header in action.

npm start

It will start the local webserver to deploy your application at following URL:




We discussed how to add a OnScroll event handler in React js application. Using the useLayoutEffect hook available in functional components we can bind the OnScroll event on elements without facing any issues.

The OnScroll event can be used to implement various similar kind functionalities like adding frozen footer bar or getting a dynamic Offset top of the page on scroll.


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