Get Javascript Field Error Message

field_login_validation_error.groovy

import com.kms.katalon.core.util.KeywordUtil
import com.kms.katalon.core.webui.driver.DriverFactory
import org.openqa.selenium.By

alert_id = 'Isi isian ini.'
alert_en = 'Please fill out this field.'
def driver = DriverFactory.getWebDriver()
def field_login = driver.findElement(By.id('user_email'))
def message = WebUI.executeJavaScript("return arguments[0].validationMessage;", Arrays.asList(field_login))
if ((message==alert_id)||(message==alert_en)) {
	if (message==alert_id) {
		KeywordUtil.markPassed('Error appear in ID language')
	} else {
		KeywordUtil.markPassed('Error appear in EN language')
	}
} else {
	KeywordUtil.markFailed('Validation Error Message Not Appear')
}