Function isStaticRules

code/styling/public/app.js:21690–21715

(rules, attrs)

var areStylesCacheable = IS_BROWSER;

var isStaticRules = function isStaticRules(rules, attrs) {
  for (var i = 0; i < rules.length; i += 1) {
    var rule = rules[i];

    // recursive case
    if (Array.isArray(rule) && !isStaticRules(rule)) {
      return false;
    } else if (typeof rule === 'function' && !isStyledComponent(rule)) {
      // functions are allowed to be static if they're just being
      // used to get the classname of a nested styled copmonent
      return false;
    }
  }

  if (attrs !== undefined) {
    // eslint-disable-next-line guard-for-in, no-restricted-syntax
    for (var key in attrs) {
      var value = attrs[key];
      if (typeof value === 'function') {
        return false;
      }
    }
  }

  return true;
};

var isHRMEnabled = typeof module !== 'undefined' && module.hot && process.env.NODE_ENV !== 'production';