What is the best way to do optional function parameters in JavaScript?

Javascript Web Development Front End Technology

To include optional function parameters in JavaScript, you can try the following,

function myFunc(a, b = 0) {
   // function body
}

Example

You can try to run the following code to learn how to include optional function parameters −

<html>
   <body>
      <script>
         // default is set to 1
         function inc(val1, inc = 1) {
            return val1 + inc;
         }
         
         document.write(inc(10,10));
         document.write("<br>");
         document.write(inc(10));
      </script>
   </body>
</html>