The task is detect the operating system of User with the help of JavaScript. we’re going to discuss few techniques.
Approach:
- Access the navigator.appVersion or navigator.userAgent property.
- Get the index of the OS using indexOf() method.
- If index is other than -1, then it is the OS, that we are looking for.
Example 1: In this example, navigator.appVersion property is used to get the OS.
<!DOCTYPE HTML> <html> <head> <title> JavaScript | Detecting the Operating System of User. </title> </head> <body style="text-align:center;" id="body"> <h1 style="color:green;"> GeeksForGeeks </h1> <p id="GFG_UP" style="font-size: 19px; font-weight: bold;"> </p> <button onclick="GFG_Fun()"> click here </button> <p id="GFG_DOWN" style="color: green; font-size: 24px; font-weight: bold;"> </p> <script> HTMLDocument.prototype.e = document.getElementById; var el_up = document.e("GFG_UP"); var el_down = document.e("GFG_DOWN"); el_up.innerHTML = "Click on the button to get the OS of User's System."; var Name = "Not known"; if (navigator.appVersion.indexOf("Win") != -1) Name = "Windows OS"; if (navigator.appVersion.indexOf("Mac") != -1) Name = "MacOS"; if (navigator.appVersion.indexOf("X11") != -1) Name = "UNIX OS"; if (navigator.appVersion.indexOf("Linux") != -1) Name = "Linux OS"; function GFG_Fun() { el_down.innerHTML = Name; } </script> </body> </html> |
Output:
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Before clicking on the button:
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After clicking on the button:
Example 2: In this example, navigator.userAgent property is used to get the OS.
<!DOCTYPE HTML> <html> <head> <title> JavaScript | Detecting the Operating System of User. </title> </head> <body style="text-align:center;" id="body"> <h1 style="color:green;"> GeeksForGeeks </h1> <p id="GFG_UP" style="font-size: 19px; font-weight: bold;"> </p> <button onclick="GFG_Fun()"> click here </button> <p id="GFG_DOWN" style="color: green; font-size: 24px; font-weight: bold;"> </p> <script> var el_up = document.getElementById("GFG_UP"); var el_down = document.getElementById("GFG_DOWN"); el_up.innerHTML = "Click on the button to get the OS of User's System."; var Name = "Unknown OS"; if (navigator.userAgent.indexOf("Win") != -1) Name = "Windows OS"; if (navigator.userAgent.indexOf("Mac") != -1) Name = "Macintosh"; if (navigator.userAgent.indexOf("Linux") != -1) Name = "Linux OS"; if (navigator.userAgent.indexOf("Android") != -1) Name = "Android OS"; if (navigator.userAgent.indexOf("like Mac") != -1) Name = "iOS"; function GFG_Fun() { el_down.innerHTML = Name; } </script> </body> </html> |
Output:
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Before clicking on the button:
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After clicking on the button:
