code-lab/node_modules/vuetify/lib/directives/mutate/index.mjs

// Types

function mounted(el, binding) {
  const modifiers = binding.modifiers || {};
  const value = binding.value;
  const {
    once,
    immediate,
    ...modifierKeys
  } = modifiers;
  const defaultValue = !Object.keys(modifierKeys).length;
  const {
    handler,
    options
  } = typeof value === 'object' ? value : {
    handler: value,
    options: {
      attributes: modifierKeys?.attr ?? defaultValue,
      characterData: modifierKeys?.char ?? defaultValue,
      childList: modifierKeys?.child ?? defaultValue,
      subtree: modifierKeys?.sub ?? defaultValue
    }
  };
  const observer = new MutationObserver(function () {
    let mutations = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    let observer = arguments.length > 1 ? arguments[1] : undefined;
    handler?.(mutations, observer);
    if (once) unmounted(el, binding);
  });
  if (immediate) handler?.([], observer);
  el._mutate = Object(el._mutate);
  el._mutate[binding.instance.$.uid] = {
    observer
  };
  observer.observe(el, options);
}
function unmounted(el, binding) {
  if (!el._mutate?.[binding.instance.$.uid]) return;
  el._mutate[binding.instance.$.uid].observer.disconnect();
  delete el._mutate[binding.instance.$.uid];
}
export const Mutate = {
  mounted,
  unmounted
};
export default Mutate;
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