When using chrome's chrome.i18n API, the chrome.i18n.getMessage method retrieves only one message at a time.

const buttonText = chrome.i18n.getMessage('buttonText');

What I want is to update the popup UI when the popup opens with the localized contents of message.json file. Doing so requires me to know the message names used. Is there a method/technique similar to getMessage for retrieving all the contents of the message.json file at once?

Right now, I can only keep all the message names somewhere and retrieve each localized message individually like:

const messages = ["buttonText", "buttonTitle"];

messages.forEach((message) => {
  const messageText = chrome.i18n.getMessage(message);
  // Update UI
});