JavaScript

The window.navigator object contains information about the browser and the device. It helps you detect the user’s environment — such as their browser, OS, online status, and more.

---

📌 What is window.navigator?

The navigator object is a property of the window object that provides information about:

• Browser type and version
• Platform (OS)
• User’s language
• Whether the user is online
• Whether cookies are enabled
• Geolocation access

---

🔹 Common navigator Properties

Property	Description
navigator.appName	Returns the browser name
navigator.appVersion	Returns browser version info
navigator.userAgent	Returns user agent string (browser + OS info)
navigator.platform	Returns user’s operating system
navigator.language	Returns browser language (e.g., en-US)
navigator.onLine	Returns true if online
navigator.cookieEnabled	Returns true if cookies are enabled

---

🔸 Examples

✅ Detect User Agent (Browser + OS)

console.log("User Agent:", navigator.userAgent);

✅ Detect Platform (Operating System)

console.log("Platform:", navigator.platform);

✅ Check If User is Online

if (navigator.onLine) {
  console.log("User is online");
} else {
  console.log("User is offline");
}

✅ Check Cookie Support

console.log("Cookies Enabled:", navigator.cookieEnabled);

---

🔍 Detect Browser Language

console.log("Browser Language:", navigator.language);

You can use this to automatically set language preferences on your site.

---

📍 Use Case: Detect Browser Name

⚠️ navigator.appName returns "Netscape" for most browsers (including Chrome and Firefox), so it’s not reliable. Use userAgent string instead.

console.log("Browser Name:", navigator.appName); // Usually "Netscape"

---

🌐 Advanced: Geolocation (via navigator.geolocation)

You can get the user’s location (with permission):

navigator.geolocation.getCurrentPosition(function(position) {
  console.log("Latitude:", position.coords.latitude);
  console.log("Longitude:", position.coords.longitude);
});

⚠️ Works only over HTTPS and requires user permission.

---

✅ Summary

Task	Code Example
Get browser info	navigator.userAgent
Check platform	navigator.platform
Check if online	navigator.onLine
Check cookies	navigator.cookieEnabled
Get browser language	navigator.language
Get geolocation	navigator.geolocation.getCurrentPosition()

---