I'd suggest ISC or GPL, depending on 1. where you got the original code from and 2. what you'd like in the license.

On my Chromebook, Ctrl-Space switches keyboard layouts. On code-editor, it does auto-complete.

The change() function needs to make another selection element visible when clike is selected, or the editor will not perform any syntax highlighting.
The parameters for each language are as follows:

So I need a selection element that will show up when the clike option is selected, and execute the appropriate mode selection when a language is selected

need to cleanup the information at the bottom and make everything look more complete/professional

The npm dependencies are missing docs.css and normalize.css.
Errors:

file:///C:/Users/Zachary/Documents/GitHub/code-editor/node_modules/normalize.css/normalize.css 
Failed to load resource: net::ERR_FILE_NOT_FOUND

file:///C:/Users/Zachary/Documents/GitHub/code-editor/node_modules/codemirror/doc/docs.css  
Failed to load resource: net::ERR_FILE_NOT_FOUND

The autoindent uses 2 spaces, but pressing Tab produces a \t.

You can host the latest version on GitHub Pages by:

1. Creating a branch named gh-pages
2. Changing the default branch to gh-pages
3. Renaming code-editor.html to index.html
4. Deleting .gitignore

This is just a suggestion, but it would make the tool much more useful.