Function cachedToggleClass

test/angular/1.5/angular.js:29045–29053

(className, switchValue)

  }

  function cachedToggleClass(className, switchValue) {
    if (switchValue && !classCache[className]) {
      $animate.addClass($element, className);
      classCache[className] = true;
    } else if (!switchValue && classCache[className]) {
      $animate.removeClass($element, className);
      classCache[className] = false;
    }
  }

  function toggleValidationCss(validationErrorKey, isValid) {
    validationErrorKey = validationErrorKey ? '-' + snake_case(validationErrorKey, '-') : '';