diff --git a/client/src/client-only-routes/ShowCertification.js b/client/src/client-only-routes/show-certification.tsx
similarity index 80%
rename from client/src/client-only-routes/ShowCertification.js
rename to client/src/client-only-routes/show-certification.tsx
index 7c2c8a8415..bf1b1bc0de 100644
--- a/client/src/client-only-routes/ShowCertification.js
+++ b/client/src/client-only-routes/show-certification.tsx
@@ -1,12 +1,11 @@
 /* eslint-disable react/jsx-sort-props */
 import React, { useEffect, useState } from 'react';
-import PropTypes from 'prop-types';
-import { bindActionCreators } from 'redux';
+import { bindActionCreators, Dispatch } from 'redux';
 import { connect } from 'react-redux';
 import { createSelector } from 'reselect';
 import { Grid, Row, Col, Image, Button } from '@freecodecamp/react-bootstrap';
 
-import ShowProjectLinks from './ShowProjectLinks';
+import ShowProjectLinks from './show-project-links';
 import FreeCodeCampLogo from '../assets/icons/FreeCodeCamp-logo';
 // eslint-disable-next-line max-len
 import DonateForm from '../components/Donation/DonateForm';
@@ -23,62 +22,70 @@ import {
   userByNameSelector,
   fetchProfileForUser
 } from '../redux';
-import { certMap } from '../../src/resources/certAndProjectMap';
+import { certMap } from '../resources/certAndProjectMap';
 import { createFlashMessage } from '../components/Flash/redux';
 import standardErrorMessage from '../utils/standardErrorMessage';
 import reallyWeirdErrorMessage from '../utils/reallyWeirdErrorMessage';
 import { langCodes } from '../../../config/i18n/all-langs';
+// eslint-disable-next-line
+// @ts-ignore
 import envData from '../../../config/env.json';
 
 import RedirectHome from '../components/RedirectHome';
 import { Loader, Spacer } from '../components/helpers';
 import { isEmpty } from 'lodash-es';
-import { User } from '../redux/prop-types';
+import { UserType } from '../redux/prop-types';
 
-const { clientLocale } = envData;
+const { clientLocale } = envData as { clientLocale: keyof typeof langCodes };
 
 const localeCode = langCodes[clientLocale];
-
-const propTypes = {
-  cert: PropTypes.shape({
-    username: PropTypes.string,
-    name: PropTypes.string,
-    certName: PropTypes.string,
-    certTitle: PropTypes.string,
-    completionTime: PropTypes.number,
-    date: PropTypes.number
-  }),
-  certDashedName: PropTypes.string,
-  certSlug: PropTypes.string,
-  createFlashMessage: PropTypes.func.isRequired,
-  executeGA: PropTypes.func,
-  fetchProfileForUser: PropTypes.func,
-  fetchState: PropTypes.shape({
-    pending: PropTypes.bool,
-    complete: PropTypes.bool,
-    errored: PropTypes.bool
-  }),
-  isDonating: PropTypes.bool,
-  isValidCert: PropTypes.bool,
-  location: PropTypes.shape({
-    pathname: PropTypes.string
-  }),
-  showCert: PropTypes.func.isRequired,
-  signedInUserName: PropTypes.string,
-  user: User,
-  userFetchState: PropTypes.shape({
-    complete: PropTypes.bool
-  }),
-  userFullName: PropTypes.string,
-  username: PropTypes.string
+type CertType = {
+  username: string;
+  name: string;
+  certName: string;
+  certTitle: string;
+  completionTime: number;
+  date: number;
 };
+interface IShowCertificationProps {
+  cert: CertType;
+  certDashedName: string;
+  certSlug: string;
+  createFlashMessage: (payload: typeof standardErrorMessage) => void;
+  executeGA: (payload: Record<string, unknown>) => void;
+  fetchProfileForUser: (username: string) => void;
+  fetchState: {
+    pending: boolean;
+    complete: boolean;
+    errored: boolean;
+  };
+  isDonating: boolean;
+  isValidCert: boolean;
+  location: {
+    pathname: string;
+  };
+  showCert: ({
+    username,
+    certSlug
+  }: {
+    username: string;
+    certSlug: string;
+  }) => void;
+  signedInUserName: string;
+  user: UserType;
+  userFetchState: {
+    complete: boolean;
+  };
+  userFullName: string;
+  username: string;
+}
 
-const requestedUserSelector = (state, { username = '' }) =>
-  userByNameSelector(username.toLowerCase())(state);
+const requestedUserSelector = (state: unknown, { username = '' }) =>
+  userByNameSelector(username.toLowerCase())(state) as UserType;
 
 const validCertSlugs = certMap.map(cert => cert.certSlug);
 
-const mapStateToProps = (state, props) => {
+const mapStateToProps = (state: unknown, props: IShowCertificationProps) => {
   const isValidCert = validCertSlugs.some(slug => slug === props.certSlug);
   return createSelector(
     showCertSelector,
@@ -87,7 +94,14 @@ const mapStateToProps = (state, props) => {
     userFetchStateSelector,
     isDonatingSelector,
     requestedUserSelector,
-    (cert, fetchState, signedInUserName, userFetchState, isDonating, user) => ({
+    (
+      cert: CertType,
+      fetchState: IShowCertificationProps['fetchState'],
+      signedInUserName: string,
+      userFetchState: IShowCertificationProps['userFetchState'],
+      isDonating: boolean,
+      user
+    ) => ({
       cert,
       fetchState,
       isValidCert,
@@ -99,13 +113,13 @@ const mapStateToProps = (state, props) => {
   );
 };
 
-const mapDispatchToProps = dispatch =>
+const mapDispatchToProps = (dispatch: Dispatch) =>
   bindActionCreators(
     { createFlashMessage, showCert, fetchProfileForUser, executeGA },
     dispatch
   );
 
-const ShowCertification = props => {
+const ShowCertification = (props: IShowCertificationProps): JSX.Element => {
   const { t } = useTranslation();
   const [isDonationSubmitted, setIsDonationSubmitted] = useState(false);
   const [isDonationDisplayed, setIsDonationDisplayed] = useState(false);
@@ -131,6 +145,7 @@ const ShowCertification = props => {
     } = props;
 
     if (!signedInUserName || signedInUserName !== username) {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-call
       if (isEmpty(user) && username) {
         fetchProfileForUser(username);
       }
@@ -168,7 +183,11 @@ const ShowCertification = props => {
     setIsDonationClosed(true);
   };
 
-  const handleProcessing = (duration, amount, action) => {
+  const handleProcessing = (
+    duration: string,
+    amount: number,
+    action: string
+  ) => {
     props.executeGA({
       type: 'event',
       data: {
@@ -241,7 +260,7 @@ const ShowCertification = props => {
     </div>
   );
 
-  let donationSection = (
+  const donationSection = (
     <div className='donation-section'>
       {!isDonationSubmitted && (
         <Row>
@@ -327,12 +346,7 @@ const ShowCertification = props => {
 
         <main className='information'>
           <div className='information-container'>
-            <Trans
-              user={displayName}
-              title={certTitle}
-              time={completionTime}
-              i18nKey='certification.fulltext'
-            >
+            <Trans title={certTitle} i18nKey='certification.fulltext'>
               <h3>placeholder</h3>
               <h1>
                 <strong>{{ user: displayName }}</strong>
@@ -376,6 +390,5 @@ const ShowCertification = props => {
 };
 
 ShowCertification.displayName = 'ShowCertification';
-ShowCertification.propTypes = propTypes;
 
 export default connect(mapStateToProps, mapDispatchToProps)(ShowCertification);
diff --git a/client/src/client-only-routes/ShowProfileOrFourOhFour.js b/client/src/client-only-routes/show-profile-or-four-oh-four.tsx
similarity index 52%
rename from client/src/client-only-routes/ShowProfileOrFourOhFour.js
rename to client/src/client-only-routes/show-profile-or-four-oh-four.tsx
index e164c727e4..e327f3d716 100644
--- a/client/src/client-only-routes/ShowProfileOrFourOhFour.js
+++ b/client/src/client-only-routes/show-profile-or-four-oh-four.tsx
@@ -1,5 +1,4 @@
 import React, { Component } from 'react';
-import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { isEmpty } from 'lodash-es';
 
@@ -13,46 +12,58 @@ import {
 import FourOhFour from '../components/FourOhFour';
 import Profile from '../components/profile/Profile';
 import { isBrowser } from '../../utils/index';
+import { UserType } from '../redux/prop-types';
 
-const propTypes = {
-  fetchProfileForUser: PropTypes.func.isRequired,
-  isSessionUser: PropTypes.bool,
-  maybeUser: PropTypes.string,
-  requestedUser: PropTypes.shape({
-    username: PropTypes.string,
-    profileUI: PropTypes.object
-  }),
-  showLoading: PropTypes.bool
-};
+interface IShowProfileOrFourOhFourProps {
+  fetchProfileForUser: (username: string) => void;
+  fetchState: {
+    pending: boolean;
+    complete: boolean;
+    errored: boolean;
+  };
+  isSessionUser: boolean;
+  maybeUser: string;
+  requestedUser: UserType;
+  showLoading: boolean;
+}
 
 const createRequestedUserSelector =
   () =>
-  (state, { maybeUser = '' }) =>
-    userByNameSelector(maybeUser.toLowerCase())(state);
+  (state: unknown, { maybeUser = '' }) =>
+    userByNameSelector(maybeUser.toLowerCase())(state) as string;
 const createIsSessionUserSelector =
   () =>
-  (state, { maybeUser = '' }) =>
+  (state: unknown, { maybeUser = '' }) =>
     maybeUser.toLowerCase() === usernameSelector(state);
 
-const makeMapStateToProps = () => (state, props) => {
-  const requestedUserSelector = createRequestedUserSelector();
-  const isSessionUserSelector = createIsSessionUserSelector();
-  const fetchState = userProfileFetchStateSelector(state, props);
-  return {
-    requestedUser: requestedUserSelector(state, props),
-    isSessionUser: isSessionUserSelector(state, props),
-    showLoading: fetchState.pending,
-    fetchState
+const makeMapStateToProps =
+  () => (state: unknown, props: IShowProfileOrFourOhFourProps) => {
+    const requestedUserSelector = createRequestedUserSelector();
+    const isSessionUserSelector = createIsSessionUserSelector();
+    const fetchState = userProfileFetchStateSelector(
+      state
+    ) as IShowProfileOrFourOhFourProps['fetchState'];
+    return {
+      requestedUser: requestedUserSelector(
+        state,
+        props
+      ) as IShowProfileOrFourOhFourProps['requestedUser'],
+      isSessionUser: isSessionUserSelector(state, props),
+      showLoading: fetchState.pending,
+      fetchState
+    };
   };
-};
 
-const mapDispatchToProps = {
+const mapDispatchToProps: {
+  fetchProfileForUser: IShowProfileOrFourOhFourProps['fetchProfileForUser'];
+} = {
   fetchProfileForUser
 };
 
-class ShowProfileOrFourOhFour extends Component {
+class ShowProfileOrFourOhFour extends Component<IShowProfileOrFourOhFourProps> {
   componentDidMount() {
     const { requestedUser, maybeUser, fetchProfileForUser } = this.props;
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
     if (isEmpty(requestedUser)) {
       fetchProfileForUser(maybeUser);
     }
@@ -64,6 +75,7 @@ class ShowProfileOrFourOhFour extends Component {
     }
 
     const { isSessionUser, requestedUser, showLoading } = this.props;
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
     if (isEmpty(requestedUser)) {
       if (showLoading) {
         // We don't know if /:maybeUser is a user or not, we will show
@@ -78,13 +90,17 @@ class ShowProfileOrFourOhFour extends Component {
 
     // We have a response from the API, and we have some state in the
     // store for /:maybeUser, we now handover rendering to the Profile component
+    // eslint-disable-next-line
+    // @ts-ignore TODO: sort out whether user.portfolio is an array or obj. lit.
     return <Profile isSessionUser={isSessionUser} user={requestedUser} />;
   }
 }
 
+// eslint-disable-next-line
+// @ts-ignore
 ShowProfileOrFourOhFour.displayName = 'ShowProfileOrFourOhFour';
-ShowProfileOrFourOhFour.propTypes = propTypes;
 
+// eslint-disable-next-line @typescript-eslint/no-unsafe-call
 export default connect(
   makeMapStateToProps,
   mapDispatchToProps
diff --git a/client/src/client-only-routes/ShowProjectLinks.js b/client/src/client-only-routes/show-project-links.tsx
similarity index 70%
rename from client/src/client-only-routes/ShowProjectLinks.js
rename to client/src/client-only-routes/show-project-links.tsx
index 6abf6599b4..2945caa7c6 100644
--- a/client/src/client-only-routes/ShowProjectLinks.js
+++ b/client/src/client-only-routes/show-project-links.tsx
@@ -1,6 +1,5 @@
 /* eslint-disable react/jsx-sort-props */
 import React, { useState } from 'react';
-import PropTypes from 'prop-types';
 import '../components/layouts/project-links.css';
 import { maybeUrlRE } from '../utils';
 import { Spacer, Link } from '../components/helpers';
@@ -8,69 +7,63 @@ import { projectMap, legacyProjectMap } from '../resources/certAndProjectMap';
 import ProjectModal from '../components/SolutionViewer/ProjectModal';
 import { find, first } from 'lodash-es';
 import { Trans, useTranslation } from 'react-i18next';
+import {
+  ChallengeFileType,
+  CompletedChallenge,
+  UserType
+} from '../redux/prop-types';
 
-const propTypes = {
-  certName: PropTypes.string,
-  name: PropTypes.string,
-  user: PropTypes.shape({
-    completedChallenges: PropTypes.arrayOf(
-      PropTypes.shape({
-        id: PropTypes.string,
-        solution: PropTypes.string,
-        githubLink: PropTypes.string,
-        files: PropTypes.arrayOf(
-          PropTypes.shape({
-            contents: PropTypes.string,
-            ext: PropTypes.string,
-            key: PropTypes.string,
-            name: PropTypes.string,
-            path: PropTypes.string
-          })
-        )
-      })
-    ),
-    username: PropTypes.string
-  })
+interface IShowProjectLinksProps {
+  certName: string;
+  name: string;
+  user: UserType;
+}
+
+type SolutionStateType = {
+  projectTitle: string;
+  challengeFiles: ChallengeFileType[] | null;
+  solution: null | string;
+  isOpen: boolean;
 };
 
-const initSolutionState = {
+const initSolutionState: SolutionStateType = {
   projectTitle: '',
-  files: null,
+  challengeFiles: null,
   solution: null,
   isOpen: false
 };
 
-const ShowProjectLinks = props => {
+const ShowProjectLinks = (props: IShowProjectLinksProps): JSX.Element => {
   const [solutionState, setSolutionState] = useState(initSolutionState);
 
   const handleSolutionModalHide = () => setSolutionState(initSolutionState);
 
   const { t } = useTranslation();
 
-  const getProjectSolution = (projectId, projectTitle) => {
+  const getProjectSolution = (projectId: string, projectTitle: string) => {
     const {
       user: { completedChallenges }
     } = props;
-
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
     const completedProject = find(
       completedChallenges,
       ({ id }) => projectId === id
-    );
+    ) as CompletedChallenge;
 
     if (!completedProject) {
       return null;
     }
 
-    const { solution, githubLink, files } = completedProject;
+    const { solution, githubLink, challengeFiles } = completedProject;
     const onClickHandler = () =>
       setSolutionState({
         projectTitle,
-        files,
+        challengeFiles,
         solution,
         isOpen: true
       });
 
-    if (files && files.length) {
+    if (challengeFiles) {
       return (
         <button
           onClick={onClickHandler}
@@ -96,7 +89,6 @@ const ShowProjectLinks = props => {
     if (maybeUrlRE.test(solution)) {
       return (
         <a
-          block={'true'}
           className='btn-invert'
           href={solution}
           rel='noopener noreferrer'
@@ -113,7 +105,7 @@ const ShowProjectLinks = props => {
     );
   };
 
-  const renderProjectsFor = certName => {
+  const renderProjectsFor = (certName: string) => {
     if (certName === 'Legacy Full Stack') {
       const legacyCerts = [
         { title: 'Responsive Web Design' },
@@ -124,8 +116,13 @@ const ShowProjectLinks = props => {
         { title: 'Legacy Information Security and Quality Assurance' }
       ];
       return legacyCerts.map((cert, ind) => {
+        /* eslint-disable @typescript-eslint/no-unsafe-assignment */
+        /* eslint-disable @typescript-eslint/no-unsafe-call */
+        /* eslint-disable @typescript-eslint/no-unsafe-return */
+        /* eslint-disable @typescript-eslint/no-unsafe-member-access */
+        // @ts-expect-error Error expected until projectMap is typed
         const mapToUse = projectMap[cert.title] || legacyProjectMap[cert.title];
-        const { certSlug } = first(mapToUse);
+        const { certSlug } = first(mapToUse) as { certSlug: string };
         const certLocation = `/certification/${username}/${certSlug}`;
         return (
           <li key={ind}>
@@ -141,16 +138,23 @@ const ShowProjectLinks = props => {
         );
       });
     }
+    // @ts-expect-error Error expected until projectMap is typed
     return (projectMap[certName] || legacyProjectMap[certName]).map(
+      // @ts-expect-error Error expected until projectMap is typed
       ({ link, title, id }) => (
         <li key={id}>
+          {/* @ts-expect-error Link needs to be typed */}
           <Link to={link} className='project-link'>
-            {t(`certification.project.title.${title}`, title)}
+            {t(`certification.project.title.${title as string}`, title)}
           </Link>
           : {getProjectSolution(id, title)}
         </li>
       )
     );
+    /* eslint-disable @typescript-eslint/no-unsafe-assignment */
+    /* eslint-disable @typescript-eslint/no-unsafe-call */
+    /* eslint-disable @typescript-eslint/no-unsafe-return */
+    /* eslint-disable @typescript-eslint/no-unsafe-member-access */
   };
 
   const {
@@ -158,7 +162,7 @@ const ShowProjectLinks = props => {
     name,
     user: { username }
   } = props;
-  const { files, isOpen, projectTitle, solution } = solutionState;
+  const { challengeFiles, isOpen, projectTitle, solution } = solutionState;
   return (
     <div>
       {t(
@@ -172,7 +176,7 @@ const ShowProjectLinks = props => {
       <Spacer />
       {isOpen ? (
         <ProjectModal
-          files={files}
+          files={challengeFiles}
           handleSolutionModalHide={handleSolutionModalHide}
           isOpen={isOpen}
           projectTitle={projectTitle}
@@ -202,7 +206,6 @@ const ShowProjectLinks = props => {
   );
 };
 
-ShowProjectLinks.propTypes = propTypes;
 ShowProjectLinks.displayName = 'ShowProjectLinks';
 
 export default ShowProjectLinks;
diff --git a/client/src/client-only-routes/ShowSettings.test.js b/client/src/client-only-routes/show-settings.test.tsx
similarity index 89%
rename from client/src/client-only-routes/ShowSettings.test.js
rename to client/src/client-only-routes/show-settings.test.tsx
index 11c2fbaf17..b8d4754c76 100644
--- a/client/src/client-only-routes/ShowSettings.test.js
+++ b/client/src/client-only-routes/show-settings.test.tsx
@@ -1,10 +1,12 @@
+/* eslint-disable */
+// @ts-nocheck Likely need to not use ShallowRenderer
 import React from 'react';
 import ShallowRenderer from 'react-test-renderer/shallow';
 import envData from '../../../config/env.json';
 
-import { ShowSettings } from './ShowSettings';
+import { ShowSettings } from './show-settings';
 
-const { apiLocation } = envData;
+const { apiLocation } = envData as Record<string, string>;
 
 jest.mock('../analytics');
 
@@ -53,3 +55,4 @@ const loggedInProps = {
 };
 const loggedOutProps = { ...loggedInProps };
 loggedOutProps.isSignedIn = false;
+/* eslint-disable */
diff --git a/client/src/client-only-routes/ShowSettings.js b/client/src/client-only-routes/show-settings.tsx
similarity index 84%
rename from client/src/client-only-routes/ShowSettings.js
rename to client/src/client-only-routes/show-settings.tsx
index 6c07cef13b..1c7dc89ed7 100644
--- a/client/src/client-only-routes/ShowSettings.js
+++ b/client/src/client-only-routes/show-settings.tsx
@@ -1,5 +1,4 @@
 import React, { Fragment } from 'react';
-import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { createSelector } from 'reselect';
 import { Grid } from '@freecodecamp/react-bootstrap';
@@ -25,30 +24,31 @@ import Portfolio from '../components/settings/Portfolio';
 import Honesty from '../components/settings/Honesty';
 import Certification from '../components/settings/Certification';
 import DangerZone from '../components/settings/DangerZone';
-import { User } from '../redux/prop-types';
+import { UserType } from '../redux/prop-types';
 
-const { apiLocation } = envData;
+const { apiLocation } = envData as Record<string, string>;
 
-const propTypes = {
-  createFlashMessage: PropTypes.func.isRequired,
-  isSignedIn: PropTypes.bool.isRequired,
-  navigate: PropTypes.func.isRequired,
-  showLoading: PropTypes.bool.isRequired,
-  submitNewAbout: PropTypes.func.isRequired,
-  toggleNightMode: PropTypes.func.isRequired,
-  updateInternetSettings: PropTypes.func.isRequired,
-  updateIsHonest: PropTypes.func.isRequired,
-  updatePortfolio: PropTypes.func.isRequired,
-  updateQuincyEmail: PropTypes.func.isRequired,
-  user: User,
-  verifyCert: PropTypes.func.isRequired
-};
+// TODO: update types for actions
+interface IShowSettingsProps {
+  createFlashMessage: (paylaod: string[]) => void;
+  isSignedIn: boolean;
+  navigate: (location: string) => void;
+  showLoading: boolean;
+  submitNewAbout: () => void;
+  toggleNightMode: (theme: string) => void;
+  updateInternetSettings: () => void;
+  updateIsHonest: () => void;
+  updatePortfolio: () => void;
+  updateQuincyEmail: (isSendQuincyEmail: boolean) => void;
+  user: UserType;
+  verifyCert: () => void;
+}
 
 const mapStateToProps = createSelector(
   signInLoadingSelector,
   userSelector,
   isSignedInSelector,
-  (showLoading, user, isSignedIn) => ({
+  (showLoading: boolean, user: UserType, isSignedIn) => ({
     showLoading,
     user,
     isSignedIn
@@ -59,15 +59,16 @@ const mapDispatchToProps = {
   createFlashMessage,
   navigate,
   submitNewAbout,
-  toggleNightMode: theme => updateUserFlag({ theme }),
+  toggleNightMode: (theme: string) => updateUserFlag({ theme }),
   updateInternetSettings: updateUserFlag,
   updateIsHonest: updateUserFlag,
   updatePortfolio: updateUserFlag,
-  updateQuincyEmail: sendQuincyEmail => updateUserFlag({ sendQuincyEmail }),
+  updateQuincyEmail: (sendQuincyEmail: boolean) =>
+    updateUserFlag({ sendQuincyEmail }),
   verifyCert
 };
 
-export function ShowSettings(props) {
+export function ShowSettings(props: IShowSettingsProps): JSX.Element {
   const { t } = useTranslation();
   const {
     createFlashMessage,
@@ -199,6 +200,5 @@ export function ShowSettings(props) {
 }
 
 ShowSettings.displayName = 'ShowSettings';
-ShowSettings.propTypes = propTypes;
-
+// eslint-disable-next-line @typescript-eslint/no-unsafe-call
 export default connect(mapStateToProps, mapDispatchToProps)(ShowSettings);
diff --git a/client/src/client-only-routes/ShowUnsubscribed.js b/client/src/client-only-routes/show-unsubscribed.tsx
similarity index 88%
rename from client/src/client-only-routes/ShowUnsubscribed.js
rename to client/src/client-only-routes/show-unsubscribed.tsx
index e0cf948ab0..5e16d1c87d 100644
--- a/client/src/client-only-routes/ShowUnsubscribed.js
+++ b/client/src/client-only-routes/show-unsubscribed.tsx
@@ -1,5 +1,4 @@
 import React, { Fragment } from 'react';
-import PropTypes from 'prop-types';
 import { Grid, Panel, Button } from '@freecodecamp/react-bootstrap';
 import Helmet from 'react-helmet';
 import { useTranslation } from 'react-i18next';
@@ -8,9 +7,13 @@ import envData from '../../../config/env.json';
 import FullWidthRow from '../components/helpers/full-width-row';
 import { Spacer } from '../components/helpers';
 
-const { apiLocation } = envData;
+const { apiLocation } = envData as Record<string, string>;
 
-function ShowUnsubscribed({ unsubscribeId }) {
+function ShowUnsubscribed({
+  unsubscribeId
+}: {
+  unsubscribeId: string;
+}): JSX.Element {
   const { t } = useTranslation();
   return (
     <Fragment>
@@ -47,8 +50,5 @@ function ShowUnsubscribed({ unsubscribeId }) {
 }
 
 ShowUnsubscribed.displayName = 'ShowUnsubscribed';
-ShowUnsubscribed.propTypes = {
-  unsubscribeId: PropTypes.string
-};
 
 export default ShowUnsubscribed;
diff --git a/client/src/client-only-routes/ShowUser.js b/client/src/client-only-routes/show-user.tsx
similarity index 78%
rename from client/src/client-only-routes/ShowUser.js
rename to client/src/client-only-routes/show-user.tsx
index e347647d62..558a26b923 100644
--- a/client/src/client-only-routes/ShowUser.js
+++ b/client/src/client-only-routes/show-user.tsx
@@ -1,5 +1,4 @@
 import React, { Component, Fragment } from 'react';
-import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 import { createSelector } from 'reselect';
 import {
@@ -24,24 +23,31 @@ import {
 } from '../redux';
 import { Spacer, Loader, FullWidthRow } from '../components/helpers';
 
-const propTypes = {
-  email: PropTypes.string,
-  isSignedIn: PropTypes.bool,
-  reportUser: PropTypes.func.isRequired,
-  t: PropTypes.func.isRequired,
-  userFetchState: PropTypes.shape({
-    pending: PropTypes.bool,
-    complete: PropTypes.bool,
-    errored: PropTypes.bool
-  }),
-  username: PropTypes.string
-};
+interface IShowUserProps {
+  email: string;
+  isSignedIn: boolean;
+  reportUser: (payload: {
+    username: string;
+    reportDescription: string;
+  }) => void;
+  t: (payload: unknown, ops?: Record<string, unknown>) => string;
+  userFetchState: {
+    pending: boolean;
+    complete: boolean;
+    errored: boolean;
+  };
+  username: string;
+}
 
 const mapStateToProps = createSelector(
   isSignedInSelector,
   userFetchStateSelector,
   userSelector,
-  (isSignedIn, userFetchState, { email }) => ({
+  (
+    isSignedIn,
+    userFetchState: IShowUserProps['userFetchState'],
+    { email }: { email: string }
+  ) => ({
     isSignedIn,
     userFetchState,
     email
@@ -52,8 +58,11 @@ const mapDispatchToProps = {
   reportUser
 };
 
-class ShowUser extends Component {
-  constructor(props) {
+class ShowUser extends Component<IShowUserProps> {
+  state: {
+    textarea: string;
+  };
+  constructor(props: IShowUserProps) {
     super(props);
 
     this.state = {
@@ -63,14 +72,14 @@ class ShowUser extends Component {
     this.handleSubmit = this.handleSubmit.bind(this);
   }
 
-  handleChange(e) {
+  handleChange(e: React.ChangeEvent<HTMLTextAreaElement>) {
     const textarea = e.target.value.slice();
     return this.setState({
       textarea
     });
   }
 
-  handleSubmit(e) {
+  handleSubmit(e: React.FormEvent) {
     e.preventDefault();
     const { textarea: reportDescription } = this.state;
     const { username, reportUser } = this.props;
@@ -124,11 +133,12 @@ class ShowUser extends Component {
         <Row className='overflow-fix'>
           <Col sm={6} smOffset={3} xs={12}>
             <p>
-              <Trans email={email} i18nKey='report.notify-1'>
+              <Trans i18nKey='report.notify-1'>
                 <strong>{{ email }}</strong>
               </Trans>
             </p>
             <p>{t('report.notify-2')}</p>
+            {/* eslint-disable @typescript-eslint/unbound-method */}
             <form onSubmit={this.handleSubmit}>
               <FormGroup controlId='report-user-textarea'>
                 <ControlLabel>{t('report.what')}</ControlLabel>
@@ -144,6 +154,7 @@ class ShowUser extends Component {
               </Button>
               <Spacer />
             </form>
+            {/* eslint-disable @typescript-eslint/unbound-method */}
           </Col>
         </Row>
       </Fragment>
@@ -151,9 +162,10 @@ class ShowUser extends Component {
   }
 }
 
+// @ts-expect-error Config might need to be remedied, or component transformed into F.C.
 ShowUser.displayName = 'ShowUser';
-ShowUser.propTypes = propTypes;
 
 export default withTranslation()(
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-call
   connect(mapStateToProps, mapDispatchToProps)(ShowUser)
 );
diff --git a/client/src/pages/404.js b/client/src/pages/404.js
index fd8dcff09a..d804c3a98a 100644
--- a/client/src/pages/404.js
+++ b/client/src/pages/404.js
@@ -4,7 +4,7 @@ import { withPrefix } from 'gatsby';
 
 import FourOhFour from '../components/FourOhFour';
 /* eslint-disable max-len */
-import ShowProfileOrFourOhFour from '../client-only-routes/ShowProfileOrFourOhFour';
+import ShowProfileOrFourOhFour from '../client-only-routes/show-profile-or-four-oh-four';
 /* eslint-enable max-len */
 
 function FourOhFourPage() {
diff --git a/client/src/pages/certification.js b/client/src/pages/certification.js
index 236a42ee13..1cfbf09371 100644
--- a/client/src/pages/certification.js
+++ b/client/src/pages/certification.js
@@ -3,7 +3,7 @@ import { Router } from '@reach/router';
 import { withPrefix } from 'gatsby';
 
 import RedirectHome from '../components/RedirectHome';
-import ShowCertification from '../client-only-routes/ShowCertification';
+import ShowCertification from '../client-only-routes/show-certification';
 
 import './certification.css';
 
diff --git a/client/src/pages/settings.js b/client/src/pages/settings.js
index e1170f2f07..c89a0d47e0 100644
--- a/client/src/pages/settings.js
+++ b/client/src/pages/settings.js
@@ -3,7 +3,7 @@ import { Router } from '@reach/router';
 import { withPrefix } from 'gatsby';
 
 import RedirectHome from '../components/RedirectHome';
-import ShowSettings from '../client-only-routes/ShowSettings';
+import ShowSettings from '../client-only-routes/show-settings';
 
 function Settings() {
   return (
diff --git a/client/src/pages/unsubscribed.js b/client/src/pages/unsubscribed.js
index e0a3ea7305..2670a37174 100644
--- a/client/src/pages/unsubscribed.js
+++ b/client/src/pages/unsubscribed.js
@@ -3,7 +3,7 @@ import { Router } from '@reach/router';
 import { withPrefix } from 'gatsby';
 
 import RedirectHome from '../components/RedirectHome';
-import ShowUnsubscribed from '../client-only-routes/ShowUnsubscribed';
+import ShowUnsubscribed from '../client-only-routes/show-unsubscribed';
 
 function Unsubscribed() {
   return (
diff --git a/client/src/pages/user.js b/client/src/pages/user.js
index cb78847438..1717ae3c27 100644
--- a/client/src/pages/user.js
+++ b/client/src/pages/user.js
@@ -3,7 +3,7 @@ import { Router } from '@reach/router';
 import { withPrefix } from 'gatsby';
 
 import RedirectHome from '../components/RedirectHome';
-import ShowUser from '../client-only-routes/ShowUser';
+import ShowUser from '../client-only-routes/show-user';
 
 function User() {
   return (
diff --git a/client/src/redux/index.js b/client/src/redux/index.js
index 305dfcc9dc..38fff44057 100644
--- a/client/src/redux/index.js
+++ b/client/src/redux/index.js
@@ -215,6 +215,7 @@ export const shouldRequestDonationSelector = state => {
 
 export const userByNameSelector = username => state => {
   const { user } = state[ns];
+  // TODO: Why return a string or empty objet literal?
   return username in user ? user[username] : {};
 };