JavaScript code used to determine whether the browser supports html5_javascript

This article mainly introduces how to use js to determine whether a browser supports html5. If you need it, you can refer to it. HTML5 seems to be getting popular now. For compatibility considerations, some front-end experts, the code used to judge the browser on the client is added to the webpage to check whether the browser supports HTML5. Below are two methods I want to use.

Method 1,

Script function checkhHtml5 () {if (typeof (Worker )! = "Undefined") {alert ("HTML5 supported");} else {alert ("HTML5 not supported") ;}} script

Method 2,

 Script if (! Document. getElementById ("Canvas"). getContext) {alert ("html5 not supported");} else {alert ("html5 supported");} script

If you have a better method, please contact me! Thank you.