Function invokeCallbackWithFallback

src/plugins/plugin.tooltip.js:447–455

* Invoke callback from object with context and arguments. * If callback returns `undefined`, then will be invoked default callback. * @param {Record<keyof typeof defaultCallbacks, Function>} callbacks * @param {keyof typeof defaultCallbacks} name * @param {*} ctx * @param {*} arg * @returns {a

(callbacks, name, ctx, arg)

 * @returns {any}
 */
function invokeCallbackWithFallback(callbacks, name, ctx, arg) {
  const result = callbacks[name].call(ctx, arg);

  if (typeof result === 'undefined') {
    return defaultCallbacks[name].call(ctx, arg);
  }

  return result;
}

export class Tooltip extends Element {