Javascript onload event - how to tell if script is already loaded?

Question

How can I use javascript to determine if an HTMLScriptElement has already been fully loaded?

How can I determine if a dynamically loaded script has finished loading

Answer 1

Why not add an id to the script element? Check to see if the id exists before continuing....

function includeJs(jsFilePath) {

  if (document.getElementById(jsFilePath+"_script")) {
    return;
  }
  var js = document.createElement("script");

  js.type = "text/javascript";
  js.id = jsFilePath+"_script";
  js.src = jsFilePath;

  document.body.appendChild(js); 
}