jlyu26 / mini-blog Goto Github PK

function validate(values) {
	const errors = {};
	if (!values.title) {
		errors.title = "Enter a title!";
	}

	// `values.title.length` codes will cause error 
        // 'Cannot read property 'length' of undefined'
	 if (values.title.length < 3) {
	 	errors.title = "Title must be as least 3 characters";
	 }

	if (!values.categories) {
		errors.categories = 'Enter some categories';
	}
	if (!values.content) {
		errors.content = 'Enter some content please';
	}
	return errors;
}