js determines whether the browser supports html5_javascript techniques

Now HTML5 seems to be slowly becoming popular. For the sake of compatibility, some front-end experts will add code to judge the client browser in the web page to know whether the user's browser supports HTML5. Below I will share two methods that I use myself. Method

Method 1,

<script>  
function checkhHtml5() {   
if (typeof(Worker) !== "undefined") {   alert("支持HTML5");   }   else {   alert("不支持HTML5");   }  } 
</script>

Method 2,

<canvas id="Canvas" ></canvas>

<script>   if (!document.getElementById("Canvas").getContext) {     alert("不支持html5");   }   else{  alert("支持html5");  } </script>

If there is a better way, please contact me! Thank you