JS，只使用 html。 我可以检查用户浏览器吗？

Question

Just use HTML. Not use JS. Can I know about user browser

I can know about user browser. If I use JS. I want to control in HTML. 'PC' browser can't see the button. But 'Mobel' browser can see the button. Only use HTML. Not use JS. Can I possible it?

JS Code: window.javascript . var filter = win32|win64"; if(navigator.platform){ if(0 > filter.indexOf(navigator.platform.toLowerCase())){ alert("Mobile"); }else{ alert("PC"); } }

Answer 1

This code will give you the type of device in

tag of HTML, You can use it in other cases if you want.

 function detectDeviceType() { if ( navigator.userAgent.match(/Android/i) || navigator.userAgent.match(/webOS/i) || navigator.userAgent.match(/iPhone/i) || navigator.userAgent.match(/iPad/i) || navigator.userAgent.match(/iPod/i) || navigator.userAgent.match(/BlackBerry/i) || navigator.userAgent.match(/Windows Phone/i) ) { $('#typeOfDevice').text('Type of device is Mobile'); } else { $('#typeOfDevice').text('Type of device is PC'); } }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <form> <input type="button" onclick="detectDeviceType();" value="Find type of my device" /> <p id="typeOfDevice"></p> </form>

Hope this helps.

Answer 2

Pure HTML does not have any "active" elements that could be used to check the currently running browser and HTML does not know how it will be displayed/used - that depends on the browser. You do need JS or some other client-side code to perform the check.

Answer 3

Well, if your browser will make request to server, you can know its user agent through headers (without js, making post request, for example). Here you can see browser detection using user-agent https://developer.mozilla.org/en-US/docs/Web/HTTP/Browser_detection_using_the_user_agent

Must contain:

• Firefox - Firefox/xyz
• Chrome - Chrome/xyz
• Chromium Chromium/xyz
• Safari Safari/xyz
• Opera - OPR/xyz (Opera 15+) Opera/xyz (Opera 12-)
• Internet Explorer -; MSIE xyz;

But note that some browsers are lying: Chrome for example reports both as Chrome and Safari. So to detect Safari you have to check for the Safari string and the absence of the Chrome string, Chromium often reports itself as Chrome too or Seamonkey sometimes reports itself as Firefox.