refactor: use a consistent classname prop and avoid children prop

I was using the FunctionComponent type for some component that do not
use children. So I change the type to VoidFunctionComponent to avoid
mistakes.
I also rename all the "classes" or "additionalClasses" props to
"className" to keep consistency between each components.

4 files changed, 18 insertions, 15 deletions

diff --git a/src/components/molecules/buttons/back-to-top.stories.tsx b/src/components/molecules/buttons/back-to-top.stories.tsx
index f1a36e5..fe58293 100644
--- a/src/components/molecules/buttons/back-to-top.stories.tsx
+++ b/src/components/molecules/buttons/back-to-top.stories.tsx
@@ -6,11 +6,14 @@ export default {
   title: 'Molecules/Buttons',
   component: BackToTopComponent,
   argTypes: {
-    additionalClasses: {
+    className: {
       control: {
         type: 'text',
       },
-      description: 'Add additional classes to the button wrapper.',
+      description: 'Set additional classnames to the button wrapper.',
+      table: {
+        category: 'Styles',
+      },
       type: {
         name: 'string',
         required: false,
diff --git a/src/components/molecules/buttons/back-to-top.tsx b/src/components/molecules/buttons/back-to-top.tsx
index f25d3e9..56c5247 100644
--- a/src/components/molecules/buttons/back-to-top.tsx
+++ b/src/components/molecules/buttons/back-to-top.tsx
@@ -1,14 +1,14 @@
 import ButtonLink from '@components/atoms/buttons/button-link';
 import Arrow from '@components/atoms/icons/arrow';
-import { FC } from 'react';
+import { VFC } from 'react';
 import { useIntl } from 'react-intl';
 import styles from './back-to-top.module.scss';
 
-type BackToTopProps = {
+export type BackToTopProps = {
   /**
-   * Add additional classes to the button wrapper.
+   * Set additional classnames to the button wrapper.
    */
-  additionalClasses?: string;
+  className?: string;
   /**
    * An element id (without hashtag) to use as anchor.
    */
@@ -20,7 +20,7 @@ type BackToTopProps = {
  *
  * Render a back to top link.
  */
-const BackToTop: FC<BackToTopProps> = ({ additionalClasses, target }) => {
+const BackToTop: VFC<BackToTopProps> = ({ className = '', target }) => {
   const intl = useIntl();
   const linkName = intl.formatMessage({
     defaultMessage: 'Back to top',
@@ -29,7 +29,7 @@ const BackToTop: FC<BackToTopProps> = ({ additionalClasses, target }) => {
   });
 
   return (
-    <div className={`${styles.wrapper} ${additionalClasses}`}>
+    <div className={`${styles.wrapper} ${className}`}>
       <ButtonLink shape="square" target={`#${target}`} aria-label={linkName}>
         <Arrow direction="top" />
       </ButtonLink>
diff --git a/src/components/molecules/buttons/help-button.stories.tsx b/src/components/molecules/buttons/help-button.stories.tsx
index 7ed953e..cfc1b0b 100644
--- a/src/components/molecules/buttons/help-button.stories.tsx
+++ b/src/components/molecules/buttons/help-button.stories.tsx
@@ -6,11 +6,11 @@ export default {
   title: 'Molecules/Buttons',
   component: HelpButtonComponent,
   argTypes: {
-    classes: {
+    className: {
       control: {
         type: 'text',
       },
-      description: 'Set additional classes to the button.',
+      description: 'Set additional classnames to the button wrapper.',
       table: {
         category: 'Options',
       },
diff --git a/src/components/molecules/buttons/help-button.tsx b/src/components/molecules/buttons/help-button.tsx
index d933829..aeb84ec 100644
--- a/src/components/molecules/buttons/help-button.tsx
+++ b/src/components/molecules/buttons/help-button.tsx
@@ -1,13 +1,13 @@
 import Button, { ButtonProps } from '@components/atoms/buttons/button';
-import { FC } from 'react';
+import { VFC } from 'react';
 import { useIntl } from 'react-intl';
 import styles from './help-button.module.scss';
 
 export type HelpButtonProps = Pick<ButtonProps, 'onClick'> & {
   /**
-   * Set additional classes to the button.
+   * Set additional classnames to the button wrapper.
    */
-  classes?: string;
+  className?: string;
 };
 
 /**
@@ -15,7 +15,7 @@ export type HelpButtonProps = Pick<ButtonProps, 'onClick'> & {
  *
  * Render a button with an interrogation mark icon.
  */
-const HelpButton: FC<HelpButtonProps> = ({ classes = '', onClick }) => {
+const HelpButton: VFC<HelpButtonProps> = ({ className = '', onClick }) => {
   const intl = useIntl();
   const text = intl.formatMessage({
     defaultMessage: 'Help',
@@ -26,7 +26,7 @@ const HelpButton: FC<HelpButtonProps> = ({ classes = '', onClick }) => {
   return (
     <Button
       shape="circle"
-      additionalClasses={`${styles.btn} ${classes}`}
+      className={`${styles.btn} ${className}`}
       onClick={onClick}
     >
       <span className="screen-reader-text">{text}</span>