how to run javascript code on vscode code example

Example 1: how to run javascript program in visual studio code

id =vinay;
const mul=function multi(a,b) {
  return (a*b)
  document.getElementById("vinay").innerHTML=mul(5,8)
}

Example 2: how to run js file in vs code

Simply open the .js file in question in VS Code, 
  switch to the 'Debug Console' tab, hit the debug button 
  in the left nav bar, and click the run icon (play button)!