Added js-theme-manager-2019 sample

samples/js-theme-manager-2019/.editorconfig

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+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+
+[*]
+
+# change these settings to your own preference
+indent_style = space
+indent_size = 2
+
+# we recommend you to keep these unchanged
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[{package,bower}.json]
+indent_style = space
+indent_size = 2

samples/js-theme-manager-2019/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Dependency directories
+node_modules
+
+# Build generated files
+dist
+lib
+solution
+temp
+*.sppkg
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# OSX
+.DS_Store
+
+# Visual Studio files
+.ntvs_analysis.dat
+.vs
+bin
+obj
+
+# Resx Generated Code
+*.resx.ts
+
+# Styles Generated Code
+*.scss.ts

samples/js-theme-manager-2019/.yo-rc.json

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+{
+  "@microsoft/generator-sharepoint": {
+    "isCreatingSolution": true,
+    "environment": "onprem19",
+    "version": "1.8.1",
+    "libraryName": "js-theme-manager-2019",
+    "libraryId": "13993f26-4e3c-4518-9ef0-97da21759508",
+    "packageManager": "npm",
+    "componentType": "webpart"
+  }
+}

samples/js-theme-manager-2019/README.md

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+# Modern Experience Theme Manager
+
+## Summary
+This sample web part provides a user interface for applying a Modern Experience theme in SharePoint 2019 on-premises.
+
+The Theme Palette can be generated using the UI Fabric Theme Generator at: https://fabricweb.z5.web.core.windows.net/pr-deploy-site/refs/pull/9318/merge/theming-designer/index.html.
+
+<h2>The following feature is available within this sample:</h2>
+
+<b>Apply a theme:</b><br>
+By providing a Site Collection URL, along with a theme name and palette, the theme will be applied to the Site Collection directly without being added to the tenant Company Theme options.<br>
+NOTE: This is a great option to provide theme management of a Site Collection without adding a theme to the "Company Themes" choices within the "Change the Look" options at the tenant level. The web part could be added to a Site Collection App Catalog to ensure availability of the web part is only available to those approved for theme management.
+![preview](./assets/apply-a-theme.png)
+
+
+## Used SharePoint Framework Version 
+![drop](https://img.shields.io/badge/drop-1.8.2-orange.svg)
+
+## Applies to
+
+* [SharePoint Framework](https:/dev.office.com/sharepoint)
+* SharePoint 2019 on-premises
+
+
+## Solution
+
+Solution|Author(s)
+--------|---------
+js-theme-manager-2019 | David Warner II ([@DavidWarnerII](https://twitter.com/davidwarnerii) / [Warner Digital](http://warner.digital))
+js-theme-manager-2019 | Beau Cameron ([@Beau__Cameron](https://twitter.com/@Beau__Cameron) / [Blog](https://beaucameron.net/))
+js-theme-manager-2019 | Biju Basheer
+js-theme-manager-2019 | Eric Skaggs ([@skaggej](https://twitter.com/skaggej) / [ericskaggs.net](http://www.ericskaggs.net/))
+
+## Version history
+
+Version|Date|Comments
+-------|----|--------
+2019.0.0.0|June 17, 2019|Initial release
+
+## Disclaimer
+**THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.**
+
+---
+
+## Minimal Path to Awesome
+
+- Clone this repository
+- in the command line run:
+  - `npm install`
+  - `gulp serve`
+
+
+
+## Features
+This Web Part illustrates the following concepts on top of the SharePoint Framework:
+
+- Using the SharePoint Online REST API to apply Modern Experience Themes
+
+## Additional Information:
+
+- [Office UI Fabric Theme Palette Generator](https://fabricweb.z5.web.core.windows.net/pr-deploy-site/refs/pull/9318/merge/theming-designer/index.html)
+
+<img src="https://telemetry.sharepointpnp.com/sp-dev-fx-webparts/samples/js-theme-manager-2019" />

samples/js-theme-manager-2019/config/config.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/config.2.0.schema.json",
+  "version": "2.0",
+  "bundles": {
+    "modern-theme-manager-web-part": {
+      "components": [
+        {
+          "entrypoint": "./lib/webparts/modernThemeManager/ModernThemeManagerWebPart.js",
+          "manifest": "./src/webparts/modernThemeManager/ModernThemeManagerWebPart.manifest.json"
+        }
+      ]
+    }
+  },
+  "externals": {},
+  "localizedResources": {
+    "ModernThemeManagerWebPartStrings": "lib/webparts/modernThemeManager/loc/{locale}.js"
+  }
+}

samples/js-theme-manager-2019/config/copy-assets.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/copy-assets.schema.json",
+  "deployCdnPath": "temp/deploy"
+}

samples/js-theme-manager-2019/config/deploy-azure-storage.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/deploy-azure-storage.schema.json",
+  "workingDir": "./temp/deploy/",
+  "account": "<!-- STORAGE ACCOUNT NAME -->",
+  "container": "js-theme-manager-2019",
+  "accessKey": "<!-- ACCESS KEY -->"
+}

samples/js-theme-manager-2019/config/package-solution.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/package-solution.schema.json",
+  "solution": {
+    "name": "js-theme-manager-2019-client-side-solution",
+    "id": "a828ebcf-33a4-478c-99d6-de70c11a6762",
+    "version": "2019.0.0.0",
+    "includeClientSideAssets": true,
+    "skipFeatureDeployment": true
+  },
+  "paths": {
+    "zippedPackage": "solution/js-theme-manager-2019.sppkg"
+  }
+}

samples/js-theme-manager-2019/config/serve.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/core-build/serve.schema.json",
+  "port": 4321,
+  "https": true,
+  "initialPage": "https://localhost:5432/workbench",
+  "api": {
+    "port": 5432,
+    "entryPath": "node_modules/@microsoft/sp-webpart-workbench/lib/api/"
+  }
+}

samples/js-theme-manager-2019/config/write-manifests.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/write-manifests.schema.json",
+  "cdnBasePath": "<!-- PATH TO CDN -->"
+}

samples/js-theme-manager-2019/gulpfile.js

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+'use strict';
+
+const gulp = require('gulp');
+const build = require('@microsoft/sp-build-web');
+build.addSuppression(`Warning - [sass] The local CSS class 'ms-Grid' is not camelCase and will not be type-safe.`);
+
+build.initialize(gulp);

samples/js-theme-manager-2019/package.json

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+{
+  "name": "js-theme-manager-2019",
+  "version": "2019.0.0",
+  "private": true,
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "build": "gulp bundle",
+    "clean": "gulp clean",
+    "test": "gulp test"
+  },
+  "dependencies": {
+    "@microsoft/sp-core-library": "~1.4.0",
+    "@microsoft/sp-webpart-base": "~1.4.0",
+    "@microsoft/sp-lodash-subset": "~1.4.0",
+    "@microsoft/sp-office-ui-fabric-core": "~1.4.0",
+    "@types/webpack-env": "1.13.1",
+    "@types/es6-promise": "0.0.33"
+  },
+  "devDependencies": {
+    "@microsoft/sp-build-web": "~1.4.1",
+    "@microsoft/sp-module-interfaces": "~1.4.1",
+    "@microsoft/sp-webpart-workbench": "~1.4.1",
+    "gulp": "~3.9.1",
+    "@types/chai": "3.4.34",
+    "@types/mocha": "2.2.38",
+    "ajv": "~5.2.2"
+  }
+}

samples/js-theme-manager-2019/src/index.ts

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+// A file is required to be in the root of the /src directory by the TypeScript compiler

samples/js-theme-manager-2019/src/webparts/modernThemeManager/ModernThemeManagerWebPart.manifest.json

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+{
+  "$schema": "https://developer.microsoft.com/json-schemas/spfx/client-side-web-part-manifest.schema.json",
+  "id": "b707d69b-a546-4915-8d0d-a60b95f1d9fc",
+  "alias": "ModernThemeManagerWebPart",
+  "componentType": "WebPart",
+
+  // The "*" signifies that the version should be taken from the package.json
+  "version": "*",
+  "manifestVersion": 2,
+
+  // If true, the component can only be installed on sites where Custom Script is allowed.
+  // Components that allow authors to embed arbitrary script code should set this to true.
+  // https://support.office.com/en-us/article/Turn-scripting-capabilities-on-or-off-1f2c515f-5d7e-448a-9fd7-835da935584f
+  "requiresCustomScript": false,
+
+  "preconfiguredEntries": [{
+    "groupId": "5c03119e-3074-46fd-976b-c60198311f70", // Other
+    "group": { "default": "Other" },
+    "title": { "default": "Modern Theme Manager" },
+    "description": { "default": "Modern Theme Manager description" },
+    "officeFabricIconFontName": "Page",
+    "properties": {
+      "description": "Modern Theme Manager"
+    }
+  }]
+}

samples/js-theme-manager-2019/src/webparts/modernThemeManager/ModernThemeManagerWebPart.module.scss

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+@import '~@microsoft/sp-office-ui-fabric-core/dist/sass/SPFabricCore.scss';
+
+.jsGenericWebpartThemeGenerator {
+  .container {
+    max-width: 700px;
+    margin: 0px auto;
+    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 25px 50px 0 rgba(0, 0, 0, 0.1);
+  }
+
+  .row {
+    @include ms-Grid-row;
+    @include ms-fontColor-white;
+    background-color: $ms-color-themeDark;
+    padding: 20px;
+  }
+
+  .column {
+    border:0px solid;
+  }
+
+  .title {
+    @include ms-font-xl;
+    @include ms-fontColor-white;
+  }
+
+  .subTitle {
+    @include ms-font-l;
+    @include ms-fontColor-white;
+  }
+
+  .description {
+    @include ms-font-l;
+    @include ms-fontColor-white;
+  }
+
+  .input {
+    display: block;
+    width:300px;
+  }
+
+  .textarea {
+    display: block;
+    width:300px;
+    height:255px;
+    margin-bottom: 20px;
+  }
+
+  .siteurl {
+    margin-bottom: 20px;
+    width:300px;
+  }
+
+  #availableThemesSelect {
+    display: inline;
+  }
+
+  .hide{
+    display:none !important;
+  }
+
+  .show {
+    display: inherit;
+  }
+
+  .genericWrapper {
+    display: block;
+  }
+
+  #themeSelectWrapper,
+  #themeNameWrapper,
+  #themePaletteWrapper,
+  #themeSiteURLWrapper {
+    margin-left:25px;
+  }
+
+  .themeGeneratorURL {
+    color: "[theme: themePrimary, default: #fff]";
+  }
+
+  .radio {
+    cursor: pointer;
+  }
+
+  .button {
+    // Our button
+    text-decoration: none;
+    height: 32px;
+
+    // Primary Button
+    min-width: 80px;
+    background-color: $ms-color-themePrimary;
+    border-color: $ms-color-themePrimary;
+    color: $ms-color-white;
+
+    // Basic Button
+    outline: transparent;
+    position: relative;
+    font-family: "Segoe UI WestEuropean","Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif;
+    -webkit-font-smoothing: antialiased;
+    font-size: $ms-font-size-m;
+    font-weight: $ms-font-weight-regular;
+    border-width: 0;
+    text-align: center;
+    cursor: pointer;
+    display: inline-block;
+    padding: 0 16px;
+    margin-top: 10px;
+    margin-left:25px;
+
+    .label {
+      font-weight: $ms-font-weight-semibold;
+      font-size: $ms-font-size-m;
+      height: 32px;
+      line-height: 32px;
+      margin: 0 4px;
+      vertical-align: top;
+      display: inline-block;
+    }
+  }
+}

samples/js-theme-manager-2019/src/webparts/modernThemeManager/ModernThemeManagerWebPart.ts

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+import { Version } from '@microsoft/sp-core-library';
+import {
+  BaseClientSideWebPart,
+  IPropertyPaneConfiguration,
+  PropertyPaneTextField
+} from '@microsoft/sp-webpart-base';
+import { escape } from '@microsoft/sp-lodash-subset';
+
+import styles from './ModernThemeManagerWebPart.module.scss';
+import * as strings from 'ModernThemeManagerWebPartStrings';
+
+import { IDigestCache, DigestCache } from '@microsoft/sp-http';
+import { SPHttpClient, SPHttpClientResponse, ISPHttpClientOptions } from '@microsoft/sp-http';
+
+export interface IModernThemeManagerWebPartProps {
+  description: string;
+}
+
+export default class ModernThemeManagerWebPart extends BaseClientSideWebPart<IModernThemeManagerWebPartProps> {
+
+  public render(): void {
+    this.domElement.innerHTML = `
+      <div class="${ styles.jsGenericWebpartThemeGenerator}">
+        <div class="${ styles.container}">
+          <div class="${ styles.row}">
+            <div class="${ styles.column}">
+              <div class="${ styles.title}">Modern Experience SharePoint Theme Manager</div>
+              <a class="${ styles.themeGeneratorURL}" href="https://fabricweb.z5.web.core.windows.net/pr-deploy-site/refs/pull/9318/merge/theming-designer/index.html" target="_blank">
+                UI Fabric Theme Generator
+              </a>
+
+              <div class="${ styles.hide}">
+                <p class="${ styles.subTitle}">Theme Actions</p> 
+                <label class="${ styles.radio}"><input type="radio" name="themeAction" value="create"> Create a theme</label>
+                <label class="${ styles.radio}"><input type="radio" name="themeAction" value="update"> Update a theme</label>
+                <label class="${ styles.radio}"><input type="radio" name="themeAction" value="delete"> Delete a theme</label>
+                <label class="${ styles.radio}"><input type="radio" name="themeAction" value="apply"> Apply a theme</label>
+              </div>
+
+              <div>
+                <p class="${ styles.subTitle}">Theme Actions</p> 
+                <label class="${ styles.radio}"><input type="radio" name="themeAction" value="apply"> Apply a theme</label>
+              </div>
+
+              <div class="${ styles.hide} ${styles.genericWrapper}" id="${styles.themeSelectWrapper}">
+                <p class="${ styles.subTitle}">Available Themes</p> 
+                <select id="${ styles.availableThemesSelect}" name="availableThemes">
+                </select>
+              </div>
+
+              
+              <div class="${ styles.hide} ${styles.genericWrapper}" id="${styles.themeNameWrapper}">
+                <p class="${ styles.subTitle}">Theme Name</p>
+                <div>
+                  <input id="${ styles.input}" class="${styles.input}">
+                </div>
+              </div>
+
+              <div class="${ styles.hide} ${styles.genericWrapper}" id="${styles.themePaletteWrapper}">
+                <p class="${ styles.subTitle}">Theme Palette</p>
+                <div>
+                  <textarea id="${ styles.textarea}" class="${styles.textarea}"></textarea>
+                </div>
+              </div>
+
+              <div class="${ styles.hide} ${styles.genericWrapper}"  id="${styles.themeSiteURLWrapper}">
+                <p class="${ styles.subTitle}">Relative Site URL (ex: "/sites/SiteCollectionName")</p>
+                <div>
+                  <input id="${ styles.siteurl}" class="${styles.siteurl}">
+                </div>
+              </div>
+
+              <div id="createTheme" class="${ styles.button} ${styles.hide}">
+                <span class="${ styles.label}">Create Theme</span>
+              </div>
+              <div id="updateTheme" class="${ styles.button} ${styles.hide}">
+                <span class="${ styles.label}">Update Theme</span>
+              </div>
+              <div id="deleteTheme" class="${ styles.button} ${styles.hide}">
+                <span class="${ styles.label}">Delete Theme</span>
+              </div>
+              <div id="applyTheme" class="${ styles.button} ${styles.hide}">
+                <span class="${ styles.label}">Apply Theme</span>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>`;
+    this.setupClickEvent();
+  }
+
+  /***** ***** 
+  Create event listeners for Radio & Buttons
+  ***** *****/
+ public setupClickEvent(): void {
+
+  let btnCreateTheme = document.getElementById("createTheme");
+  btnCreateTheme.addEventListener("click", (e: Event) => this.createTheme());
+
+  let btnUpdateTheme = document.getElementById("updateTheme");
+  btnUpdateTheme.addEventListener("click", (e: Event) => this.updateTheme());
+
+  let btnDeleteTheme = document.getElementById("deleteTheme");
+  btnDeleteTheme.addEventListener("click", (e: Event) => this.deleteTheme());
+
+  let btnApplyTheme = document.getElementById("applyTheme");
+  btnApplyTheme.addEventListener("click", (e: Event) => this.applyThemeNew());
+
+  let radioThemeActions = document.getElementsByName("themeAction");
+  let parent = this;
+  for (var i = 0, max = radioThemeActions.length; i < max; i++) {
+    radioThemeActions[i].onclick = function () {
+      let selectedValue = (<HTMLInputElement>this).value;
+      if (selectedValue == 'delete') {
+        parent.displayDeleteOptions();
+      }
+      else if (selectedValue == 'create') {
+        parent.displayCreateOptions();
+      }
+      else if (selectedValue == 'update') {
+        parent.displayUpdateOptions();
+      }
+      else if (selectedValue == 'apply') {
+        parent.displayApplyOptions();
+      }
+
+
+    };
+  };
+
+
+}
+
+/***** ***** 
+Hide All Wrappers:
+Generic method for hiding all of the form elements
+***** *****/
+public hideAllWrappers(): void {
+
+  // Hide any other elements that might have been displayed
+  document.getElementById(styles.themeNameWrapper).classList.add(styles.hide);
+  document.getElementById(styles.themePaletteWrapper).classList.add(styles.hide);
+  let wrappers = document.getElementsByClassName(styles.genericWrapper);
+  for (let i = 0; i < wrappers.length; i++) {
+    wrappers[i].classList.add(styles.hide);
+  }
+
+
+  let buttons = document.getElementsByClassName(styles.button);
+  for (let i = 0; i < buttons.length; i++) {
+    buttons[i].classList.add(styles.hide);
+  }
+
+}
+
+/***** ***** 
+Display Update Options:
+This method is used to display the form elements for the Theme Update Options.
+***** *****/
+public displayUpdateOptions(): void {
+  // Hide all wrappers
+  this.hideAllWrappers();
+
+  this.populateExistingThemes("/_api/thememanager/GetTenantThemingOptions", {}).then((success: boolean) => {
+    if (success) {
+      // Display the dropdown.
+      document.getElementById(styles.themeSelectWrapper).classList.remove(styles.hide);
+      document.getElementById(styles.themePaletteWrapper).classList.remove(styles.hide);
+      document.getElementById('updateTheme').classList.remove(styles.hide);
+    }
+  })
+
+};
+
+
+/***** ***** 
+Display Create Options:
+This method is used to display the form elements for the Theme Creation Options.
+***** *****/
+public displayCreateOptions(): void {
+
+  // Hide all wrappers
+  this.hideAllWrappers();
+
+  // Display the dropdown.
+  document.getElementById(styles.themeNameWrapper).classList.remove(styles.hide);
+  document.getElementById(styles.themePaletteWrapper).classList.remove(styles.hide);
+  document.getElementById('createTheme').classList.remove(styles.hide);
+
+
+}
+
+/***** ***** 
+Display Delete Options:
+This method is used to display the form elements for the Theme Deletion Options.
+***** *****/
+public displayDeleteOptions(): void {
+  // Hide all wrappers
+  this.hideAllWrappers();
+
+  this.populateExistingThemes("/_api/thememanager/GetTenantThemingOptions", {}).then((success: boolean) => {
+    if (success) {
+      // Display the dropdown.
+      document.getElementById(styles.themeSelectWrapper).classList.remove(styles.hide);
+      document.getElementById('deleteTheme').classList.remove(styles.hide);
+    }
+  });
+}
+
+/***** ***** 
+Display Apply Options:
+This method is used to display the form elements for the Theme Apply Options.
+***** *****/
+public displayApplyOptions(): void {
+  // Hide all wrappers
+  this.hideAllWrappers();
+
+  // Display the dropdown.
+  document.getElementById(styles.themeNameWrapper).classList.remove(styles.hide);
+  document.getElementById(styles.themePaletteWrapper).classList.remove(styles.hide);
+  document.getElementById(styles.themeSiteURLWrapper).classList.remove(styles.hide);
+  document.getElementById('applyTheme').classList.remove(styles.hide);
+}
+
+/***** ***** 
+Populate Existing Themes:
+This method retrieves the currently available themes in the tenant and inserts the values into the dropdown.
+***** *****/
+public populateExistingThemes(url, params): Promise<boolean> {
+
+
+  return this.context.spHttpClient.get("/_api/thememanager/GetTenantThemingOptions", SPHttpClient.configurations.v1)
+    .then((response: SPHttpClientResponse) => {
+      return response.json();
+    }).then((themeJSON: any) => {
+      // Clear the select
+      let themeSelect = <HTMLInputElement>document.getElementById(styles.availableThemesSelect);
+      themeSelect.innerHTML = "";
+
+      for (let i = 0, max = themeJSON.themePreviews.length; i < max; i++) {
+        let option = document.createElement("option");
+        option.text = themeJSON.themePreviews[i].name;
+        (<HTMLInputElement>themeSelect).appendChild(option);
+
+      }
+      return true;
+    });
+
+}
+
+/***** ***** 
+Create new theme at tenant level:
+Collects the data needed to create a new theme at the tenant level and passes it to the creation execution method.
+***** *****/
+public createTheme(): void {
+
+  // Gather the theme properties
+  let themeTitle: string = (<HTMLInputElement>document.getElementById(styles.input)).value;
+  let themePalette: JSON = JSON.parse((<HTMLInputElement>document.getElementById(styles.textarea)).value);
+  let themePaletteJSON = {
+    "palette": themePalette
+  };
+
+  // Pass the theme properties to themeManagerExecution method
+  this.themeManagerExecution(this.context.pageContext.site.serverRelativeUrl + "/_api/thememanager/AddTenantTheme", { name: themeTitle, themeJson: JSON.stringify(themePaletteJSON) })
+    .then((sucess: boolean) => {
+      if (sucess) {
+        //it worked
+        alert('The theme has been successfully created');
+      }
+      else {
+        //it didn't
+        alert('An error has occurred');
+      }
+    });
+
+}
+
+
+
+/***** ***** 
+Deletes a theme at tenant level:
+Collects the data needed to delete a theme at the tenant level and passes it to the deletion execution method.
+***** *****/
+public deleteTheme(): void {
+
+  // Gather the theme properties
+  let themeTitle: string = (<HTMLInputElement>document.getElementById(styles.availableThemesSelect)).value;
+
+  // Setup the success message
+  let successMessage: string = 'The theme has been successfully deleted';
+
+  // Pass the theme properties to themeManagerExecution method
+  this.themeManagerExecution(this.context.pageContext.site.serverRelativeUrl + "/_api/thememanager/DeleteTenantTheme", { name: themeTitle })
+    .then((sucess: boolean) => {
+      if (sucess) {
+        //it worked
+        alert('The theme has been successfully deleted');
+      }
+      else {
+        //it didn't
+        alert('An error has occurred');
+
+      }
+    });
+}
+
+/***** ***** 
+Updates a theme at tenant level:
+Collects the data needed to update a theme at the tenant level and passes it to the update execution method.
+***** *****/
+public updateTheme(): void {
+
+  // Gather the theme properties
+  let themeTitle: string = (<HTMLInputElement>document.getElementById(styles.availableThemesSelect)).value;
+  let themePalette: JSON = JSON.parse((<HTMLInputElement>document.getElementById(styles.textarea)).value);
+  let themePaletteJSON = {
+    "palette": themePalette
+  }
+
+  // Pass the theme properties to themeManagerExecution method
+  this.themeManagerExecution(this.context.pageContext.site.serverRelativeUrl + "/_api/thememanager/UpdateTenantTheme", { name: themeTitle, themeJson: JSON.stringify(themePaletteJSON) })
+    .then((sucess: boolean) => {
+      if (sucess) {
+        //it worked
+        alert('The theme has been successfully updated');
+      }
+      else {
+        //it didn't
+        alert('An error has occurred');
+      }
+    });
+}
+
+
+/***** ***** 
+Apply a theme to a site collection:
+Collects the data needed to apply a theme directly to a site colleciton.
+NOTE: This does NOT create a theme choice at the tenant level. It will directly apply the theme to a site collection.
+***** *****/
+public applyThemeNew(): void {
+
+  // Gather the theme properties
+  let themeURL: string = (<HTMLInputElement>document.getElementById(styles.siteurl)).value;
+  let themeTitle: string = (<HTMLInputElement>document.getElementById(styles.input)).value;
+  let themePalette: JSON = JSON.parse((<HTMLInputElement>document.getElementById(styles.textarea)).value);
+  let themePaletteJSON = {
+    "palette": themePalette
+  }
+
+  const digestCache: IDigestCache = this.context.serviceScope.consume(DigestCache.serviceKey);
+  digestCache.fetchDigest(themeURL).then((digest: string): void => {
+
+    // Pass the theme properties to themeManagerExecution method
+    this.themeManagerExecution(themeURL + "/_api/thememanager/ApplyTheme", { name: themeTitle, themeJson: JSON.stringify(themePaletteJSON) })
+      .then((sucess: boolean) => {
+        if (sucess) {
+          //it worked
+          alert('The theme has been successfully applied');
+        }
+        else {
+          //it didn't
+          alert('An error has occurred');
+        }
+      });
+
+  });
+
+}
+
+/***** ***** 
+Generic method for creating, updating, deleting and applying a theme.
+***** *****/
+public themeManagerExecution(url: string, params: any): Promise<boolean> {
+
+  let options: ISPHttpClientOptions = {
+    body: JSON.stringify(params)
+  }
+
+  return this.context.spHttpClient.post(url, SPHttpClient.configurations.v1, options)
+    .then((response: SPHttpClientResponse) => {
+      return response.ok
+    });
+
+}
+
+  protected get dataVersion(): Version {
+    return Version.parse('1.0');
+  }
+
+  protected getPropertyPaneConfiguration(): IPropertyPaneConfiguration {
+    return {
+      pages: [
+        {
+          header: {
+            description: strings.PropertyPaneDescription
+          },
+          groups: [
+            {
+              groupName: strings.BasicGroupName,
+              groupFields: [
+                PropertyPaneTextField('description', {
+                  label: strings.DescriptionFieldLabel
+                })
+              ]
+            }
+          ]
+        }
+      ]
+    };
+  }
+}

samples/js-theme-manager-2019/src/webparts/modernThemeManager/loc/en-us.js

@@ -0,0 +1,7 @@
+define([], function() {
+  return {
+    "PropertyPaneDescription": "Description",
+    "BasicGroupName": "Group Name",
+    "DescriptionFieldLabel": "Description Field"
+  }
+});

samples/js-theme-manager-2019/src/webparts/modernThemeManager/loc/mystrings.d.ts

@@ -0,0 +1,10 @@
+declare interface IModernThemeManagerWebPartStrings {
+  PropertyPaneDescription: string;
+  BasicGroupName: string;
+  DescriptionFieldLabel: string;
+}
+
+declare module 'ModernThemeManagerWebPartStrings' {
+  const strings: IModernThemeManagerWebPartStrings;
+  export = strings;
+}

samples/js-theme-manager-2019/tsconfig.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "forceConsistentCasingInFileNames": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "jsx": "react",
+    "declaration": true,
+    "sourceMap": true,
+    "experimentalDecorators": true,
+    "skipLibCheck": true,
+    "typeRoots": [
+      "./node_modules/@types",
+      "./node_modules/@microsoft"
+    ],
+    "types": [
+      "es6-promise",
+      "webpack-env"
+    ],
+    "lib": [
+      "es5",
+      "dom",
+      "es2015.collection"
+    ]
+  }
+}

samples/js-theme-manager-2019/tslint.json

@@ -0,0 +1,30 @@
+{
+  "extends": "@microsoft/sp-tslint-rules/base-tslint.json",
+  "rules": {
+    "class-name": false,
+    "export-name": false,
+    "forin": false,
+    "label-position": false,
+    "member-access": true,
+    "no-arg": false,
+    "no-console": false,
+    "no-construct": false,
+    "no-duplicate-variable": true,
+    "no-eval": false,
+    "no-function-expression": true,
+    "no-internal-module": true,
+    "no-shadowed-variable": true,
+    "no-switch-case-fall-through": true,
+    "no-unnecessary-semicolons": true,
+    "no-unused-expression": true,
+    "no-use-before-declare": true,
+    "no-with-statement": true,
+    "semicolon": true,
+    "trailing-comma": false,
+    "typedef": false,
+    "typedef-whitespace": false,
+    "use-named-parameter": true,
+    "variable-name": false,
+    "whitespace": false
+  }
+}