@s-ui/react-organism-nested-checkboxes/lib/settings.js

This component shows a parent checkbox with children that their controls his own state.

export var BASE_CLASS = 'sui-OrganismNestedCheckboxes';
export var CONTAINER_CLASS = BASE_CLASS + "Container";
export var CHILD_CLASS = BASE_CLASS + "Child";
export var BUTTON_CLASS = BASE_CLASS + "Button";
export var checkItemIsChecked = function checkItemIsChecked(_ref) {
  var checked = _ref.checked;
  return checked === true;
};
export var isFunction = function isFunction(fn) {
  return typeof fn === 'function';
};
export var getInnerCheckboxes = function getInnerCheckboxes(node, _ref2) {
  var checked = _ref2.checked,
    indeterminate = _ref2.indeterminate;
  var checkboxes = Array.from(node.querySelectorAll("input[type='checkbox']"));
  var isChecked = checked;
  var isIndeterminate = indeterminate;
  if (checkboxes.length) {
    isChecked = checkboxes.every(checkItemIsChecked);
    isIndeterminate = !isChecked && checkboxes.some(checkItemIsChecked);
  }
  return [checkboxes, {
    checked: isChecked,
    indeterminate: isIndeterminate
  }];
};