how to apply PropType in react-native functional component?

Question

I am trying to validate props with PropType but my eslist compiler showing me an error, see image

please correct me whats wrong with this?

Answer 1

What is wrong with the code is that you are using PropTypes instead of propTypes . Notice the lower case 'p'

SubHeader.propTypes = {
    left: PropTypes.array,
    center: PropTypes.array,
    right: PropTypes.array,
 }

There is no difference with stateful components when validating props

Here is the link you want to read more on validating props

Answer 2

As mentioned in the comment, problem us casing of letter. Its lowercase p .

SubHeader.propTypes = {
     left: PropTypes.array,
     center: PropTypes.array,
     right: PropTypes.array,   
 }

Keep this thing in mind always, how we are importing:

import PropTypes from 'prop-types';

and a github issue here and propType docs here