How to run/load a separate javascript file selectively from inside javascript?

Question

I have 3 JavaScript files that I would like to load from an index.html file. I\'m choosing among them by using if statements which I only know how to d

Answer 1

I'm new to javascript but i have an idea you can set id to just like

then you can append your script to header by using this code:

var h = document.getElementById('h');
var scripts = document.createElement('script');
switch(window.innerHeight){
    case 800:
      scripts.src = 'storybook.js';
      scripts.type = 'text/javascript';
      break;
}
h.appendChild(scripts);

You can change scripts source by add more case. Thanks for reading.