javascript - How to add jQuery in JS file

Question

I have some code specific to sorting tables. Since the code is common in most pages I want to make a JS file which will have the code and all the pages using it can reference it from there.

Problem is: How do I add jQuery, and table sorter plugin into that .js file?

I tried something like this:

document.writeln('<script src="/javascripts/jquery.js" type="text/javascript"></script>');
document.writeln('<script type="text/javascript" src="/javascripts/jquery.tablesorter.js"></script>');

but this seems to not work.

What is the best way to do this?

Answer 1

var script = document.createElement('script');
script.src = 'https://code.jquery.com/jquery-3.4.1.min.js';
script.type = 'text/javascript';
document.getElementsByTagName('head')[0].appendChild(script);