discourse/app/assets/javascripts/confirm-new-email/confirm-new-email.js.es6

import { getWebauthnCredential } from "discourse/lib/webauthn";

document.getElementById("submit-security-key").onclick = function(e) {
  e.preventDefault();
  getWebauthnCredential(
    document.getElementById("security-key-challenge").value,
    document
      .getElementById("security-key-allowed-credential-ids")
      .value.split(","),
    credentialData => {
      document.getElementById("security-key-credential").value = JSON.stringify(
        credentialData
      );

      $(e.target)
        .parents("form")
        .submit();
    },
    errorMessage => {
      document.getElementById("security-key-error").innerText = errorMessage;
    }
  );
};