diff --git a/app/javascript/article-form/components/Tabs.jsx b/app/javascript/article-form/components/Tabs.jsx
index 9f0201462..a36a195aa 100644
--- a/app/javascript/article-form/components/Tabs.jsx
+++ b/app/javascript/article-form/components/Tabs.jsx
@@ -10,11 +10,13 @@ export const Tabs = ({ onPreview, previewShowing }) => {
       <ul className="crayons-tabs__list">
         <li>
           <button
-            data-text='Edit'
+            data-text="Edit"
             className={`crayons-tabs__item ${
               previewShowing ? '' : 'crayons-tabs__item--current'
             }`}
-            onClick={previewShowing && onPreview}
+            onClick={(e) => {
+              previewShowing && onPreview(e);
+            }}
             type="button"
             aria-current={previewShowing ? null : 'page'}
           >
@@ -23,11 +25,13 @@ export const Tabs = ({ onPreview, previewShowing }) => {
         </li>
         <li>
           <button
-            data-text='Preview'
+            data-text="Preview"
             className={`crayons-tabs__item ${
               previewShowing ? 'crayons-tabs__item--current' : ''
             }`}
-            onClick={!previewShowing && onPreview}
+            onClick={(e) => {
+              !previewShowing && onPreview(e);
+            }}
             type="button"
             aria-current={previewShowing ? 'page' : null}
           >
diff --git a/app/javascript/articles/LoadingArticle.jsx b/app/javascript/articles/LoadingArticle.jsx
index 2f1c54c20..da9774179 100644
--- a/app/javascript/articles/LoadingArticle.jsx
+++ b/app/javascript/articles/LoadingArticle.jsx
@@ -29,5 +29,5 @@ export const LoadingArticle = ({ version }) => {
   );
 };
 LoadingArticle.propTypes = {
-  version: PropTypes.string.isRequired,
+  version: PropTypes.string,
 };
diff --git a/app/javascript/articles/components/PublishDate.jsx b/app/javascript/articles/components/PublishDate.jsx
index 2f5cccea9..9e35872ca 100644
--- a/app/javascript/articles/components/PublishDate.jsx
+++ b/app/javascript/articles/components/PublishDate.jsx
@@ -37,7 +37,7 @@ PublishDate.defaultProps = {
 PublishDate.propTypes = {
   readablePublishDate: PropTypes.string.isRequired,
   publishedTimestamp: PropTypes.string,
-  publishedAtInt: PropTypes.string,
+  publishedAtInt: PropTypes.number,
 };
 
 PublishDate.displayName = 'PublishDate';
diff --git a/app/javascript/articles/components/SearchSnippet.jsx b/app/javascript/articles/components/SearchSnippet.jsx
index a226a3581..3cf4de5d9 100644
--- a/app/javascript/articles/components/SearchSnippet.jsx
+++ b/app/javascript/articles/components/SearchSnippet.jsx
@@ -29,8 +29,7 @@ export const SearchSnippet = ({ highlightText }) => {
 };
 
 SearchSnippet.propTypes = {
-  // eslint-disable-next-line no-underscore-dangle
-  highlightText: articleSnippetResultPropTypes.isRequired,
+  highlightText: articleSnippetResultPropTypes,
 };
 
 SearchSnippet.displayName = 'SearchSnippet';
diff --git a/app/javascript/articles/components/TagList.jsx b/app/javascript/articles/components/TagList.jsx
index 69726a1a8..c3b99db13 100644
--- a/app/javascript/articles/components/TagList.jsx
+++ b/app/javascript/articles/components/TagList.jsx
@@ -1,5 +1,5 @@
 import { h } from 'preact';
-import { tagPropTypes } from '../../common-prop-types';
+import PropTypes from 'prop-types';
 
 export const TagList = ({ tags = [], flare_tag }) => {
   let tagsToDisplay = tags;
@@ -22,7 +22,7 @@ export const TagList = ({ tags = [], flare_tag }) => {
         </a>
       )}
       {tagsToDisplay.map((tag) => (
-        <a className="crayons-tag" href={`/t/${tag}`}>
+        <a key={`tag-${tag}`} className="crayons-tag" href={`/t/${tag}`}>
           <span className="crayons-tag__prefix">#</span>
           {tag}
         </a>
@@ -32,7 +32,7 @@ export const TagList = ({ tags = [], flare_tag }) => {
 };
 
 TagList.propTypes = {
-  tags: tagPropTypes.isRequired,
+  tags: PropTypes.arrayOf(PropTypes.string).isRequired,
 };
 
 TagList.displayName = 'TagList';
diff --git a/app/javascript/common-prop-types/article-prop-types.js b/app/javascript/common-prop-types/article-prop-types.js
index abe23c84d..528430db1 100644
--- a/app/javascript/common-prop-types/article-prop-types.js
+++ b/app/javascript/common-prop-types/article-prop-types.js
@@ -1,5 +1,4 @@
 import PropTypes from 'prop-types';
-import { tagPropTypes } from './tag-prop-types';
 import { organizationPropType } from './organization-prop-type';
 
 export const articleSnippetResultPropTypes = PropTypes.shape({
@@ -11,10 +10,14 @@ export const articlePropTypes = PropTypes.shape({
   title: PropTypes.string.isRequired,
   path: PropTypes.string.isRequired,
   cloudinary_video_url: PropTypes.string,
-  video_duration_in_minutes: PropTypes.number,
+  video_duration_in_minutes: PropTypes.string,
   type_of: PropTypes.oneOf(['podcast_episodes']),
   class_name: PropTypes.oneOf(['PodcastEpisode', 'User', 'Article']),
-  flare_tag: tagPropTypes,
+  flare_tag: PropTypes.shape({
+    name: PropTypes.string.isRequired,
+    bg_color_hex: PropTypes.string,
+    text_color_hex: PropTypes.string,
+  }),
   tag_list: PropTypes.arrayOf(PropTypes.string),
   cached_tag_list_array: PropTypes.arrayOf(PropTypes.string),
   podcast: PropTypes.shape({
@@ -22,7 +25,7 @@ export const articlePropTypes = PropTypes.shape({
     title: PropTypes.string.isRequired,
     image_url: PropTypes.string.isRequired,
   }),
-  user_id: PropTypes.string.isRequired,
+  user_id: PropTypes.number.isRequired,
   user: PropTypes.shape({
     username: PropTypes.string.isRequired,
     name: PropTypes.string.isRequired,
diff --git a/app/javascript/common-prop-types/index.js b/app/javascript/common-prop-types/index.js
index 6e5fda477..8589579af 100644
--- a/app/javascript/common-prop-types/index.js
+++ b/app/javascript/common-prop-types/index.js
@@ -1,6 +1,5 @@
 export * from './user-prop-types';
 export * from './default-children-prop-types';
 export * from './organization-prop-type';
-export * from './tag-prop-types';
 export * from './article-prop-types';
 export * from './selected-tags-prop-types';
diff --git a/app/javascript/common-prop-types/tag-prop-types.js b/app/javascript/common-prop-types/tag-prop-types.js
deleted file mode 100644
index 93f537e8b..000000000
--- a/app/javascript/common-prop-types/tag-prop-types.js
+++ /dev/null
@@ -1,10 +0,0 @@
-import PropTypes from 'prop-types';
-
-export const tagPropTypes = PropTypes.shape({
-  id: PropTypes.number.isRequired,
-  name: PropTypes.string.isRequired,
-  hotness_score: PropTypes.number.isRequired,
-  points: PropTypes.number.isRequired,
-  bg_color_hex: PropTypes.string.isRequired,
-  text_color_hex: PropTypes.string.isRequired,
-});
diff --git a/app/javascript/crayons/Button/Button.jsx b/app/javascript/crayons/Button/Button.jsx
index 507a33c39..306b12f84 100644
--- a/app/javascript/crayons/Button/Button.jsx
+++ b/app/javascript/crayons/Button/Button.jsx
@@ -43,10 +43,10 @@ export const Button = (props) => {
   const {
     children,
     variant = 'primary',
-    tagName = 'button',
+    tagName,
     inverted,
-    contentType = 'text',
-    size = 'default',
+    contentType,
+    size,
     className,
     icon,
     url,
@@ -121,10 +121,13 @@ Button.defaultProps = {
   onBlur: undefined,
   tabIndex: undefined,
   title: undefined,
+  tagName: 'button',
+  size: 'default',
+  contentType: 'text',
 };
 
 Button.propTypes = {
-  children: defaultChildrenPropTypes.isRequired,
+  children: defaultChildrenPropTypes,
   variant: PropTypes.oneOf([
     'primary',
     'secondary',
@@ -146,7 +149,7 @@ Button.propTypes = {
   inverted: PropTypes.bool,
   tagName: PropTypes.oneOf(['a', 'button']).isRequired,
   className: PropTypes.string,
-  icon: PropTypes.node,
+  icon: PropTypes.oneOfType([PropTypes.node, PropTypes.func]),
   url: PropTypes.string,
   buttonType: PropTypes.string,
   disabled: PropTypes.bool,
diff --git a/app/javascript/crayons/Modal/Modal.jsx b/app/javascript/crayons/Modal/Modal.jsx
index 040cf44b1..816088593 100644
--- a/app/javascript/crayons/Modal/Modal.jsx
+++ b/app/javascript/crayons/Modal/Modal.jsx
@@ -64,7 +64,7 @@ const CloseIcon = () => (
  */
 export const Modal = ({
   children,
-  size = 'default',
+  size,
   className,
   title,
   overlay = true,
@@ -120,6 +120,10 @@ export const Modal = ({
 
 Modal.displayName = 'Modal';
 
+Modal.defaultProps = {
+  size: 'default',
+};
+
 Modal.propTypes = {
   children: defaultChildrenPropTypes.isRequired,
   className: PropTypes.string,
diff --git a/app/javascript/leftSidebar/TagsFollowed.jsx b/app/javascript/leftSidebar/TagsFollowed.jsx
index a595e25b6..4b6d4847c 100644
--- a/app/javascript/leftSidebar/TagsFollowed.jsx
+++ b/app/javascript/leftSidebar/TagsFollowed.jsx
@@ -1,6 +1,5 @@
 import { h, Fragment } from 'preact';
 import PropTypes from 'prop-types';
-import { tagPropTypes } from '../common-prop-types';
 
 export const TagsFollowed = ({ tags = [] }) => {
   return (
@@ -25,6 +24,13 @@ export const TagsFollowed = ({ tags = [] }) => {
 };
 
 TagsFollowed.displayName = 'TagsFollowed';
-TagsFollowed.propTypes = {
-  tags: PropTypes.arrayOf(tagPropTypes).isRequired,
-};
+TagsFollowed.propTypes = PropTypes.arrayOf(
+  PropTypes.shape({
+    id: PropTypes.number.isRequired,
+    name: PropTypes.string.isRequired,
+    hotness_score: PropTypes.number.isRequired,
+    points: PropTypes.number.isRequired,
+    bg_color_hex: PropTypes.string.isRequired,
+    text_color_hex: PropTypes.string.isRequired,
+  }),
+);
diff --git a/app/javascript/listings/components/ListingFilters.jsx b/app/javascript/listings/components/ListingFilters.jsx
index 94c7fc139..1ea8e4561 100644
--- a/app/javascript/listings/components/ListingFilters.jsx
+++ b/app/javascript/listings/components/ListingFilters.jsx
@@ -36,10 +36,12 @@ export const ListingFilters = ({
 };
 
 ListingFilters.propTypes = {
-  categories: PropTypes.shape({
-    slug: PropTypes.string.isRequired,
-    name: PropTypes.string.isRequired,
-  }).isRequired,
+  categories: PropTypes.arrayOf(
+    PropTypes.shape({
+      slug: PropTypes.string.isRequired,
+      name: PropTypes.string.isRequired,
+    }),
+  ).isRequired,
   category: PropTypes.string.isRequired,
   onSelectCategory: PropTypes.func.isRequired,
   message: PropTypes.isRequired,
diff --git a/app/javascript/listings/singleListing/Header.jsx b/app/javascript/listings/singleListing/Header.jsx
index 41f203f1e..9be192abf 100644
--- a/app/javascript/listings/singleListing/Header.jsx
+++ b/app/javascript/listings/singleListing/Header.jsx
@@ -36,7 +36,10 @@ export const Header = ({
           {title}
         </a>
       </h2>
-      <DateTime dateTime={listingDate} className="single-listing__date" />
+      <DateTime
+        dateTime={new Date(listingDate)}
+        className="single-listing__date"
+      />
       <TagLinks tags={listing.tags || listing.tag_list} onClick={onAddTag} />
 
       <DropdownMenu
diff --git a/app/javascript/shared/components/useKeyboardShortcuts.js b/app/javascript/shared/components/useKeyboardShortcuts.js
index 2037ffc45..b91383249 100644
--- a/app/javascript/shared/components/useKeyboardShortcuts.js
+++ b/app/javascript/shared/components/useKeyboardShortcuts.js
@@ -177,7 +177,10 @@ KeyboardShortcuts.propTypes = {
   options: PropTypes.shape({
     timeout: PropTypes.number,
   }),
-  eventTarget: PropTypes.instanceOf(Element),
+  eventTarget: PropTypes.oneOfType([
+    PropTypes.instanceOf(Element),
+    PropTypes.instanceOf(Window),
+  ]),
 };
 
 KeyboardShortcuts.defaultProps = {
diff --git a/config/webpack/development.js b/config/webpack/development.js
index 71ed8e47e..5405063aa 100644
--- a/config/webpack/development.js
+++ b/config/webpack/development.js
@@ -3,17 +3,18 @@
 process.env.NODE_ENV = process.env.NODE_ENV || 'development';
 
 const environment = require('./environment');
+
 const config = environment.toWebpackConfig();
 
 // For more information, see https://webpack.js.org/configuration/devtool/#devtool
 config.devtool = 'eval-source-map';
 
-// Inject the preact/devtools import into all the webpacker pack files (webpack entry points) that reference at least one Preact component
+// Inject the preact/debug import into all the webpacker pack files (webpack entry points) that reference at least one Preact component
 // so that Preact compoonents can be debugged with the Preact DevTools.
 config.entry = Object.entries(config.entry).reduce(
   (previous, [entryPointName, entryPointFileName]) => {
     if (/\.jsx$/.test(entryPointFileName)) {
-      previous[entryPointName] = ['preact/devtools', entryPointFileName];
+      previous[entryPointName] = ['preact/debug', entryPointFileName];
     } else {
       previous[entryPointName] = entryPointFileName;
     }