diff --git a/webapp/channels/src/components/component_library/component_library.scss b/webapp/channels/src/components/component_library/component_library.scss
new file mode 100644
index 0000000000..d15f20b3bb
--- /dev/null
+++ b/webapp/channels/src/components/component_library/component_library.scss
@@ -0,0 +1,17 @@
+.clInput {
+    display: block;
+    margin-bottom: 20px;
+}
+
+.clWrapper {
+    width: auto;
+    padding: 25px;
+}
+
+.clCenterBackground {
+    background-color: var(--center-channel-bg);
+}
+
+.clSidebarBackground {
+    background-color: var(--sidebar-bg);
+}
diff --git a/webapp/channels/src/components/component_library/hooks.tsx b/webapp/channels/src/components/component_library/hooks.tsx
new file mode 100644
index 0000000000..dc81a560a0
--- /dev/null
+++ b/webapp/channels/src/components/component_library/hooks.tsx
@@ -0,0 +1,114 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React, {useCallback, useMemo, useState} from 'react';
+
+import './component_library.scss';
+
+type HookResult<T> = [
+    {[x: string]: T},
+    JSX.Element,
+]
+export const useStringProp = (
+    propName: string,
+    defaultValue: string,
+    isTextarea: boolean,
+): HookResult<string> => {
+    const [value, setValue] = useState(defaultValue);
+    const onChange = useCallback((e: React.ChangeEvent<HTMLTextAreaElement | HTMLInputElement>) => setValue(e.target.value), []);
+    const selector = useMemo(() => {
+        const input = isTextarea ? (
+            <textarea
+                onChange={onChange}
+                value={value}
+            />
+        ) : (
+            <input
+                type='text'
+                onChange={onChange}
+                value={value}
+            />
+        );
+        return (
+            <label className='clInput'>
+                {`${propName}: `}
+                {input}
+            </label>
+        );
+    }, [onChange, value, propName, isTextarea]);
+    const preparedProp = useMemo(() => ({[propName]: value}), [propName, value]);
+
+    return [preparedProp, selector];
+};
+
+export const useBooleanProp = (
+    propName: string,
+    defaultValue: boolean,
+): HookResult<boolean> => {
+    const [value, setValue] = useState(defaultValue);
+    const onChange = useCallback((e: React.ChangeEvent<HTMLInputElement>) => setValue(e.target.checked), []);
+    const selector = useMemo(() => (
+        <label className='clInput'>
+            {`${propName}: `}
+            <input
+                type='checkbox'
+                onChange={onChange}
+                checked={value}
+            />
+        </label>
+    ), [onChange, propName, value]);
+    const preparedProp = useMemo(() => ({[propName]: value}), [propName, value]);
+
+    return [preparedProp, selector];
+};
+
+const ALL_OPTION = 'ALL';
+type DropdownHookResult = [
+    {[x: string]: string} | undefined,
+    {[x: string]: string[]} | undefined,
+    JSX.Element,
+];
+export const useDropdownProp = (
+    propName: string,
+    defaultValue: string,
+    options: string[],
+    allowAll: boolean,
+): DropdownHookResult => {
+    const [value, setValue] = useState(defaultValue);
+    const onChange = useCallback((e: React.ChangeEvent<HTMLSelectElement>) => setValue(e.target.value), []);
+    const renderedOptions = useMemo(() => {
+        const toReturn = options.map((v) => (
+            <option
+                key={v}
+                value={v}
+            >
+                {v}
+            </option>
+        ));
+        if (allowAll) {
+            toReturn.unshift((
+                <option
+                    key={ALL_OPTION}
+                    value={ALL_OPTION}
+                >
+                    {ALL_OPTION}
+                </option>
+            ));
+        }
+        return toReturn;
+    }, [options, allowAll]);
+    const selector = useMemo(() => (
+        <label className='clInput'>
+            {`${propName}: `}
+            <select
+                onChange={onChange}
+                value={value}
+            >
+                {renderedOptions}
+            </select>
+        </label>
+    ), [onChange, propName, renderedOptions, value]);
+    const preparedProp = useMemo(() => (value === ALL_OPTION ? undefined : ({[propName]: value})), [propName, value]);
+    const preparedPossibilities = useMemo(() => (value === ALL_OPTION ? ({[propName]: options}) : undefined), [propName, value, options]);
+    return [preparedProp, preparedPossibilities, selector];
+};
diff --git a/webapp/channels/src/components/component_library/index.tsx b/webapp/channels/src/components/component_library/index.tsx
new file mode 100644
index 0000000000..c5376b22f3
--- /dev/null
+++ b/webapp/channels/src/components/component_library/index.tsx
@@ -0,0 +1,125 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import classNames from 'classnames';
+import React, {useCallback, useEffect, useMemo, useState} from 'react';
+
+import {Preferences} from 'mattermost-redux/constants';
+
+import {applyTheme} from 'utils/utils';
+
+import SectionNoticeComponentLibrary from './section_notice.cl';
+
+import './component_library.scss';
+
+const componentMap = {
+    'Section Notice': SectionNoticeComponentLibrary,
+};
+
+type ComponentName = keyof typeof componentMap
+const defaultComponent = Object.keys(componentMap)[0] as ComponentName;
+
+type ThemeName = keyof typeof Preferences.THEMES;
+const defaultTheme = Object.keys(Preferences.THEMES)[0] as ThemeName;
+
+type BackgroundType = 'center' | 'sidebar';
+
+const ComponentLibrary = () => {
+    const [selectedComponent, setSelectedComponent] = useState<ComponentName>(defaultComponent);
+    const onSelectComponent = useCallback((e: React.ChangeEvent<HTMLSelectElement>) => {
+        setSelectedComponent(e.target.value as ComponentName);
+    }, []);
+
+    const [selectedTheme, setSelectedTheme] = useState(defaultTheme);
+    const onSelectTheme = useCallback((e: React.ChangeEvent<HTMLSelectElement>) => {
+        setSelectedTheme(e.target.value as ThemeName);
+    }, []);
+
+    const [selectedBackground, setSelectedBackground] = useState<BackgroundType>('center');
+    const onSelectBackground = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+        setSelectedBackground(e.currentTarget.value as BackgroundType);
+    }, []);
+
+    useEffect(() => {
+        applyTheme(Preferences.THEMES[selectedTheme]);
+    }, [selectedTheme]);
+
+    const componentOptions = useMemo(() => {
+        return Object.keys(componentMap).map((v) => (
+            <option
+                key={v}
+                value={v}
+            >
+                {v}
+            </option>
+        ));
+    }, []);
+
+    const themeOptions = useMemo(() => {
+        return Object.keys(Preferences.THEMES).map((v) => (
+            <option
+                key={v}
+                value={v}
+            >
+                {v}
+            </option>
+        ));
+    }, []);
+
+    const SelectedComponent = componentMap[selectedComponent];
+    return (
+        <div className={'clWrapper'}>
+            <label className={'clInput'}>
+                {'Component: '}
+                <select
+                    onChange={onSelectComponent}
+                    value={selectedComponent}
+                >
+                    {componentOptions}
+                </select>
+            </label>
+            <label className={'clInput'}>
+                {'Theme: '}
+                <select
+                    onChange={onSelectTheme}
+                    value={selectedTheme}
+                >
+                    {themeOptions}
+                </select>
+            </label>
+            <label className={'clInput'}>
+                {'Background: '}
+                <label>
+                    {'Center channel'}
+                    <input
+                        onChange={onSelectBackground}
+                        name={'background'}
+                        value={'center'}
+                        type={'radio'}
+                        checked={selectedBackground === 'center'}
+                    />
+                </label>
+                <label>
+                    {'Sidebar'}
+                    <input
+                        onChange={onSelectBackground}
+                        name={'background'}
+                        value={'sidebar'}
+                        type={'radio'}
+                        checked={selectedBackground === 'sidebar'}
+                    />
+                </label>
+            </label>
+            <div className={'clWrapper'}>
+                <SelectedComponent
+                    backgroundClass={classNames({
+                        clCenterBackground: selectedBackground === 'center',
+                        clSidebarBackground: selectedBackground === 'sidebar',
+                    })}
+                />
+            </div>
+        </div>
+    );
+};
+
+export default ComponentLibrary;
diff --git a/webapp/channels/src/components/component_library/section_notice.cl.tsx b/webapp/channels/src/components/component_library/section_notice.cl.tsx
new file mode 100644
index 0000000000..2a07114cc6
--- /dev/null
+++ b/webapp/channels/src/components/component_library/section_notice.cl.tsx
@@ -0,0 +1,94 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+/* eslint-disable no-alert */
+
+import classNames from 'classnames';
+import React, {useCallback, useMemo, useState} from 'react';
+
+import SectionNotice from 'components/section_notice';
+
+import {useBooleanProp, useDropdownProp, useStringProp} from './hooks';
+import {buildComponent} from './utils';
+
+import './component_library.scss';
+
+const propPossibilities = {};
+
+const sectionTypeValues = ['danger', 'info', 'success', 'welcome', 'warning'];
+
+const primaryButton = {primaryButton: {onClick: () => window.alert('primary!'), text: 'Primary'}};
+const secondaryButton = {secondaryButton: {onClick: () => window.alert('secondary!'), text: 'Secondary'}};
+const linkButton = {linkButton: {onClick: () => window.alert('link!'), text: 'Link'}};
+
+type Props = {
+    backgroundClass: string;
+};
+
+const SectionNoticeComponentLibrary = ({
+    backgroundClass,
+}: Props) => {
+    const [text, textSelector] = useStringProp('text', 'Some text', true);
+    const [title, titleSelector] = useStringProp('title', 'Some text', false);
+    const [dismissable, dismissableSelector] = useBooleanProp('isDismissable', true);
+    const [sectionType, sectionTypePosibilities, sectionTypeSelector] = useDropdownProp('type', 'danger', sectionTypeValues, true);
+
+    const [showPrimaryButton, setShowPrimaryButton] = useState(false);
+    const onChangePrimaryButton = useCallback((e: React.ChangeEvent<HTMLInputElement>) => setShowPrimaryButton(e.target.checked), []);
+
+    const [showSecondaryButton, setShowSecondaryButton] = useState(false);
+    const onChangeSecondaryButton = useCallback((e: React.ChangeEvent<HTMLInputElement>) => setShowSecondaryButton(e.target.checked), []);
+
+    const [showLinkButton, setShowLinkButton] = useState(false);
+    const onChangeLinkButton = useCallback((e: React.ChangeEvent<HTMLInputElement>) => setShowLinkButton(e.target.checked), []);
+
+    const components = useMemo(
+        () => buildComponent(SectionNotice, propPossibilities, [sectionTypePosibilities], [
+            text,
+            title,
+            dismissable,
+            sectionType,
+            showPrimaryButton ? primaryButton : undefined,
+            showSecondaryButton ? secondaryButton : undefined,
+            showLinkButton ? linkButton : undefined,
+            {onDismissClick: () => window.alert('dismiss!')},
+        ]),
+        [dismissable, sectionType, sectionTypePosibilities, showLinkButton, showPrimaryButton, showSecondaryButton, text, title],
+    );
+
+    return (
+        <>
+            {textSelector}
+            {titleSelector}
+            {dismissableSelector}
+            {sectionTypeSelector}
+            <label className='clInput'>
+                {'Show primary button: '}
+                <input
+                    type='checkbox'
+                    onChange={onChangePrimaryButton}
+                    checked={showPrimaryButton}
+                />
+            </label>
+            <label className='clInput'>
+                {'Show secondary button: '}
+                <input
+                    type='checkbox'
+                    onChange={onChangeSecondaryButton}
+                    checked={showSecondaryButton}
+                />
+            </label>
+            <label className='clInput'>
+                {'Show link button: '}
+                <input
+                    type='checkbox'
+                    onChange={onChangeLinkButton}
+                    checked={showLinkButton}
+                />
+            </label>
+            <div className={classNames('clWrapper', backgroundClass)}>{components}</div>
+        </>
+    );
+};
+
+export default SectionNoticeComponentLibrary;
diff --git a/webapp/channels/src/components/component_library/utils.tsx b/webapp/channels/src/components/component_library/utils.tsx
new file mode 100644
index 0000000000..73783e34e8
--- /dev/null
+++ b/webapp/channels/src/components/component_library/utils.tsx
@@ -0,0 +1,79 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React from 'react';
+
+function buildPropsLists(inputPossibilities: {[x: string]: any[]}): Array<{[x: string]: any}> {
+    const keys = Object.keys(inputPossibilities);
+    if (!keys.length) {
+        return [{}];
+    }
+
+    const selectedKey = keys[0];
+    const restPossibilities = {...inputPossibilities};
+    delete restPossibilities[selectedKey];
+    const subProps = buildPropsLists(restPossibilities);
+    const result: Array<{[x: string]: any}> = [];
+    inputPossibilities[selectedKey].forEach((v) => {
+        subProps.forEach((rest) => {
+            result.push({...rest, [selectedKey]: v});
+        });
+    });
+
+    return result;
+}
+
+function buildPropString(inputProps: {[x: string]: any}) {
+    const propKeys = Object.keys(inputProps);
+    if (!propKeys.length) {
+        return undefined;
+    }
+
+    const result = [(<>{'PROPS: '}</>)];
+    propKeys.forEach((v) => {
+        result.push((<><b>{v}</b>{`: ${inputProps[v]}, `}</>));
+    });
+    return result;
+}
+
+export function buildComponent(
+    Component: React.ComponentType<any>,
+    propPossibilities: {[x: string]: any[]},
+    dropdownPossibilities: Array<{[x: string]: string[]} | undefined>,
+    setProps: Array<{[x: string]: any} | undefined>,
+) {
+    const res: React.ReactNode[] = [];
+    let currentPropPossibilities = {...propPossibilities};
+    dropdownPossibilities.forEach((v) => {
+        if (v) {
+            currentPropPossibilities = {
+                ...currentPropPossibilities,
+                ...v,
+            };
+        }
+    });
+
+    const propsVariations = buildPropsLists(currentPropPossibilities);
+    let builtSetProps = {};
+    setProps.forEach((v) => {
+        if (v) {
+            builtSetProps = {
+                ...builtSetProps,
+                ...v,
+            };
+        }
+    });
+    propsVariations.forEach((v) => {
+        const propString = buildPropString(v);
+        res.push(
+            <>
+                {Boolean(propString) && <p>{propString}</p>}
+                <Component
+                    {...builtSetProps}
+                    {...v}
+                />
+            </>,
+        );
+    });
+    return res;
+}
diff --git a/webapp/channels/src/components/root/index.ts b/webapp/channels/src/components/root/index.ts
index 80968829e5..0c6d9c70f1 100644
--- a/webapp/channels/src/components/root/index.ts
+++ b/webapp/channels/src/components/root/index.ts
@@ -17,6 +17,7 @@ import {getTeam} from 'mattermost-redux/selectors/entities/teams';
 import {shouldShowTermsOfService, getCurrentUserId} from 'mattermost-redux/selectors/entities/users';
 
 import {loadRecentlyUsedCustomEmojis, migrateRecentEmojis} from 'actions/emoji_actions';
+import {isDevModeEnabled} from 'selectors/general';
 import {getShowLaunchingWorkspace} from 'selectors/onboarding';
 import {shouldShowAppBar} from 'selectors/plugins';
 import {
@@ -72,6 +73,7 @@ function mapStateToProps(state: GlobalState) {
         rhsState: getRhsState(state),
         shouldShowAppBar: shouldShowAppBar(state),
         isCloud: isCurrentLicenseCloud(state),
+        isDevModeEnabled: isDevModeEnabled(state),
     };
 }
 
diff --git a/webapp/channels/src/components/root/root.test.tsx b/webapp/channels/src/components/root/root.test.tsx
index 9616dc308d..27f6ed19dd 100644
--- a/webapp/channels/src/components/root/root.test.tsx
+++ b/webapp/channels/src/components/root/root.test.tsx
@@ -121,6 +121,7 @@ describe('components/Root', () => {
                 push: jest.fn(),
             } as unknown as RouteComponentProps['history'],
         } as RouteComponentProps,
+        isDevModeEnabled: false,
     };
 
     let originalMatchMedia: (query: string) => MediaQueryList;
diff --git a/webapp/channels/src/components/root/root.tsx b/webapp/channels/src/components/root/root.tsx
index 173cc4171e..01661006e0 100644
--- a/webapp/channels/src/components/root/root.tsx
+++ b/webapp/channels/src/components/root/root.tsx
@@ -79,6 +79,7 @@ const TeamSidebar = makeAsyncComponent('TeamSidebar', lazy(() => import('compone
 const SidebarRight = makeAsyncComponent('SidebarRight', lazy(() => import('components/sidebar_right')));
 const ModalController = makeAsyncComponent('ModalController', lazy(() => import('components/modal_controller')));
 const AppBar = makeAsyncComponent('AppBar', lazy(() => import('components/app_bar/app_bar')));
+const ComponentLibrary = makeAsyncComponent('ComponentLibrary', lazy(() => import('components/component_library')));
 
 const noop = () => {};
 
@@ -440,6 +441,12 @@ export default class Root extends React.PureComponent<Props, State> {
                         path={'/landing'}
                         component={LinkingLandingPage}
                     />
+                    {this.props.isDevModeEnabled && (
+                        <Route
+                            path={'/component_library'}
+                            component={ComponentLibrary}
+                        />
+                    )}
                     <Route
                         path={'/admin_console'}
                     >