How can I make Quill.js support an additional url scheme for links?

Question

Quill editor only permits http://, https://, and mailto: for links.

Everything else gets replaced with "about:blank"

How can I enable Quill to permit an additional URL scheme?

Update:

The array of permitted values is in Link.PROTOCOL_WHITELIST: ["http", "https", "mailto", "tel"]

Can I change that from outside the library?

Answer 1

Here's how I solved it:

let Link = window.Quill.import('formats/link');

class CustomLink extends Link {

  static sanitize(url) {
    if(url.startsWith("fmp")) {
      return url
    } else {
      let value = super.sanitize(url);
      return value;
    }
  }
}
Quill.register(CustomLink);