undefined is not a function evaluating '_react.default.PropTypes.func'

[omars94]

upon loading the example im getting an error

undefined is not an object (evaluating '_react.default.PropTypes.func')

do i need to npm install this package or just add the js and lib files?

[pistou]

You can find your answer on StackOverflow

You will need prop-types

import PropTypes from 'prop-types'
// ...
static propTypes = {
    onDragStart: PropTypes.func, // instead of React.PropTypes.func
    onDragEnd: PropTypes.func,
}
// ...