How Can I Detect a User's Browser Version Using JavaScript?

Browser Version Detection: Unmasking the Mysteries

When developing websites, determining the version of a user's browser can be crucial for ensuring compatibility and tailoring user experiences. However, finding code to detect not just the type but also the version of a browser can prove challenging.

Unveiling the Secrets: Peeking into the Browser's Window

To unravel this mystery, we delved into the depths of JavaScript and found a solution that allows us to query the browser for its version, painting a clearer picture of its capabilities.

Code Snippet: A Glimpse into the Navigator's Window

The following code snippet enables you to query the name of the browser, along with its specific version:

navigator.sayswho = (function() {
  var ua = navigator.userAgent;
  var tem;
  var M = ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
  if (/trident/i.test(M[1])) {
    tem = /\brv[ :]+(\d+)/g.exec(ua) || [];
    return 'IE ' + (tem[1] || '');
  }
  if (M[1] === 'Chrome') {
    tem = ua.match(/\b(OPR|Edge)\/(\d+)/);
    if (tem != null) return tem.slice(1).join(' ').replace('OPR', 'Opera');
  }
  M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
  if ((tem = ua.match(/version\/(\d+)/i)) != null) M.splice(1, 1, tem[1]);
  return M.join(' ');
})();

console.log(navigator.sayswho); // outputs: `Chrome 62`

Putting It into Practice: A Real-World Example

In this example, the function navigator.sayswho is invoked and returns a string containing the browser's name and version, allowing you to perform version-specific actions. For instance, if you wanted to tailor content for Firefox 3 users, you could use this code to check for their presence:

if (navigator.sayswho.includes('Firefox 3')) {
  // Display content specific to Firefox 3
}

Conclusion

By harnessing the power of JavaScript, you can unlock the secret of detecting a browser's version, empowering you to create experiences that seamlessly adapt to users' browsers. So, the next time you need to serve up content tailored to specific browser versions, remember these techniques for unlocking the mysteries of the browser's window.

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