TLDR: Yes, you can. Here: https://github.com/bingzer/js-inject/blob/main/index.js
Consider the following use-case:
CKEditor after a user’s intent to write a comment in a specific page.
This can be done by injecting
<script> on the page after the intended user’s action. One thing to consider is to not re-inject if
CKEditor is already loaded.
So I came up with a simple code snippet: js-inject
js-inject contains only one function
injectScript(). This function will inject
<script src="..."> into document only if
existsFunctions() returns a
In this scenario,
injectScript() will inject the CKEditor script only if
window.CKEditor is not already loaded.
js-inject is a code snippet (and no, it’s not an npm package) that you can copy + paste to inject
Grab it here: https://github.com/bingzer/js-inject/blob/main/index.js