External JavaScript Not Running, does not write to document

Question

I\'m trying to use an external JavaScript file in order to write \"Hello World\" into a HTML page.

However for some reason it does not work, I tried the same functio

Answer 1

In general, you want to place your JavaScript at the bottom of the page because it will normally reduce the display time of your page. You can find libraries imported in the header sometimes, but either way you need to declare your functions before you use them.

http://www.w3schools.com/js/js_whereto.asp

index.html

  
  
  




  
Hi

  
  

  
  

hello.js

function externalFunction() {
  document.getElementById("external").innerHTML = "Hello World!!!";
}

Plunker here.

Hope this helps.