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Md. Fardin Khan
Md. Fardin Khan

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Client Device Detection in Next Js

Ensuring optimal user experience across various devices is paramount in the ever-evolving web development landscape. Whether it's a smartphone, tablet, laptop, or desktop computer, each device has its own screen size, resolution, and capabilities. As web developers, one of our primary goals is to deliver content that renders seamlessly across this diverse array of devices. This is where device detection comes into play.

Device detection involves identifying the type of device accessing a website, allowing developers to tailor the content and layout accordingly. By understanding the device's characteristics, such as screen size and browser capabilities, developers can optimize the presentation of their website for a superior user experience.

In my recent endeavors to enhance website rendering within my Next.js projects, I delved into the realm of device detection. Despite numerous attempts using conventional methods, I found myself unable to achieve the desired results. After hours of research on Google and YouTube, I stumbled upon a game-changing solution: the Next.js Header API.

Utilizing the Next.js Header API for device detection involved a series of strategic implementations. By examining user-agent strings and other relevant data, I could accurately discern the type of device accessing the website. Armed with this information, I could then tailor the website rendering to suit the specific device, whether it be a mobile phone, tablet, or desktop computer.

Here's a simplified example of how this can be achieved:


import { headers } from "next/headers";
import { isMobile } from "../utils/isMobile";

export default async function Home() {
  const userAgent = headers().get("user-agent") || "";
  const mobileCheck = isMobile(userAgent);

  return mobileCheck? (
      <div>Mobile Page</div>
  ) : (
    <div>Desktop page</div>

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// utils/isMobile.ts
export const isMobile = (userAgent: string): boolean => {
  return /android.+mobile|ip(hone|[oa]d)/i.test(userAgent);

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By incorporating the Next.js Header API and implementing device detection in this manner, I was able to overcome the challenges I faced and successfully optimize website rendering for different devices. This approach not only improves user experience but also demonstrates the power and versatility of Next.js in modern web development.

Whether you're building a personal blog, an e-commerce platform, or a corporate website, considering device detection using Next.js Header API can significantly enhance your project's accessibility and appeal. Embrace this innovative solution and embark on a journey towards delivering exceptional user experiences across all devices.

Top comments (4)

redbeardjunior profile image

Thanks for sharing, did you got it working with any authentication ?

kporus profile image
Md. Fardin Khan

@redbeardjunior Sorry for being late. I didn't understand your query.

redbeardjunior profile image

@kporus no problem my question is only did you got this working in combination with Next AUTH or a similar authentication method ?

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kporus profile image
Md. Fardin Khan • Edited

no i did not use Next Auth or any similar authentication method