Making propTypes static

src/components/App/index.js

@@ -9,13 +9,7 @@ import Loader from 'components/Loader';
 import Message from 'components/Message';
 
 class App extends React.PureComponent {
-  state = {
-    loading: false,
-    loadingError: null,
-    render: {}
-  }
-
-  propTypes = {
+  static propTypes = {
     syntax: PropTypes.string,
     expr: PropTypes.string,
     permalinkUrl: PropTypes.string,
@@ -25,6 +19,12 @@ class App extends React.PureComponent {
     }))
   }
 
+  state = {
+    loading: false,
+    loadingError: null,
+    render: {}
+  }
+
   componentDidMount() {
     if (this.props.expr) {
       this.handleRender();

src/components/Form/index.js

@@ -6,12 +6,7 @@ import ExpandIcon from 'react-feather/dist/icons/chevrons-down';
 import style from './style.module.css';
 
 class Form extends React.PureComponent {
-  state = {
-    expr: this.props.expr,
-    syntax: this.props.syntax
-  }
-
-  propTypes = {
+  static propTypes = {
     expr: PropTypes.string,
     syntax: PropTypes.string,
     syntaxList: PropTypes.arrayOf(PropTypes.shape({
@@ -25,6 +20,11 @@ class Form extends React.PureComponent {
     ])
   }
 
+  state = {
+    expr: this.props.expr,
+    syntax: this.props.syntax
+  }
+
   handleSubmit = event => {
     event.preventDefault();
 

src/components/FormActions/index.js

@@ -9,12 +9,7 @@ import style from './style.module.css';
 import { createPngLink, createSvgLink } from './links';
 
 class FormActions extends React.PureComponent {
-  state = {
-    svgLink: null,
-    pngLink: null
-  }
-
-  propTypes = {
+  static propTypes = {
     permalinkUrl: PropTypes.string,
     imageDetails: PropTypes.shape({
       svg: PropTypes.string,
@@ -23,6 +18,11 @@ class FormActions extends React.PureComponent {
     })
   }
 
+  state = {
+    svgLink: null,
+    pngLink: null
+  }
+
   componentDidMount() {
     const { imageDetails } = this.props;
 

src/components/Render/index.js

@@ -6,7 +6,7 @@ import PlaceholderIcon from 'react-feather/dist/icons/file-text';
 import style from './style.module.css';
 
 class Render extends React.PureComponent {
-  propTypes = {
+  static propTypes = {
     expr: PropTypes.string,
     onRender: PropTypes.func.isRequired
   }

src/components/SentryBoundary/index.js

@@ -5,17 +5,17 @@ import * as Sentry from '@sentry/browser';
 import SentryError from 'components/SentryError';
 
 class SentryBoundary extends React.Component {
-  state = {
-    hasError: false
-  }
-
-  propTypes = {
+  static propTypes = {
     children: PropTypes.oneOfType([
       PropTypes.arrayOf(PropTypes.node),
       PropTypes.node
     ]).isRequired
   }
 
+  state = {
+    hasError: false
+  }
+
   static getDerivedStateFromError() {
     return { hasError: true };
   }