prop types

src/components/Articles/Categories/CategoryItem.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types'
 import { useLocation } from '@reach/router'
 import { Link } from 'gatsby'
 import slugify from '../../../helpers/slugify'
@@ -14,3 +15,7 @@ const CategoryItem = ({ title }) => {
 
 export default CategoryItem
 
+CategoryItem.propTypes = {
+  title: PropTypes.string
+}
+

src/components/Articles/Search/Search.js

@@ -1,4 +1,5 @@
 import React from 'react'
+import PropTypes from 'prop-types'
 
 const Search = ({ articlesLength }) => {
 	return (
@@ -10,3 +11,7 @@ const Search = ({ articlesLength }) => {
 }
 
 export default Search
+
+Search.propTypes = {
+	articlesLength: PropTypes.number
+}

src/components/Books/Books.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types'
 import slugify from '../../helpers/slugify'
 import Img from "gatsby-image"
 import './Books.scss'
@@ -18,3 +19,9 @@ const Books = ({ data: { edges } }) => {
 }
 
 export default Books
+
+Books.propTypes = {
+  data: PropTypes.shape({
+    edges: PropTypes.array
+  })
+}

src/components/Offers/Books/BookItem.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types'
 import { Link } from 'gatsby'
 import slugify from '../../../helpers/slugify'
 
@@ -11,3 +12,7 @@ const BookItem = ({ title }) => {
 }
 
 export default BookItem
+
+BookItem.propTypes = {
+  title: PropTypes.string
+}