wip: Properly select Node version

fix: Incorrect dropdowns

src/interfaces.ts

@@ -4,7 +4,7 @@ export type Files = Map<string, string>;
 
 export type FileTransform = (files: Files) => Promise<Files>;
 
-export enum ElectronVersionState {
+export enum VersionState {
   ready = 'ready',
   downloading = 'downloading',
   unknown = 'unknown'
@@ -14,12 +14,20 @@ export enum ElectronVersionSource {
   remote = 'remote',
   local = 'local'
 }
-export interface NpmVersion {
+
+export interface Version {
   version: string;
+}
+
+export interface NpmVersion extends Version {
   name?: string;
   localPath?: string;
 }
 
+export interface NodeVersion extends Version {
+  state: VersionState;
+}
+
 export interface EditorValues {
   main: string;
   renderer: string;
@@ -29,7 +37,7 @@ export interface EditorValues {
 }
 
 export interface ElectronVersion extends NpmVersion {
-  state: ElectronVersionState;
+  state: VersionState;
   source: ElectronVersionSource;
 }
 

src/renderer/components/commands-electron-chooser.tsx

@@ -3,9 +3,9 @@ import { ItemPredicate, ItemRenderer, Select } from '@blueprintjs/select';
 import { observer } from 'mobx-react';
 import * as React from 'react';
 
-import { ElectronVersion, ElectronVersionSource, ElectronVersionState } from '../../interfaces';
+import { ElectronVersion, ElectronVersionSource, VersionState } from '../../interfaces';
 import { highlightText } from '../../utils/highlight-text';
-import { sortedElectronMap } from '../../utils/sorted-electron-map';
+import { sortedElectronMap } from '../../utils/sorted-map';
 import { AppState } from '../state';
 import { getReleaseChannel } from '../versions';
 
@@ -24,11 +24,11 @@ export function getItemLabel({ source, state, name }: ElectronVersion): string {
   if (source === ElectronVersionSource.local) {
     label = name || 'Local';
   } else {
-    if (state === ElectronVersionState.unknown) {
+    if (state === VersionState.unknown) {
       label = `Not downloaded`;
-    } else if (state === ElectronVersionState.ready) {
+    } else if (state === VersionState.ready) {
       label = `Downloaded`;
-    } else if (state === ElectronVersionState.downloading) {
+    } else if (state === VersionState.downloading) {
       label = `Downloading`;
     }
   }
@@ -127,7 +127,7 @@ export const getVersionsFromAppState = (appState: AppState) => {
  * @extends {React.Component<VersionChooserProps, VersionChooserState>}
  */
 @observer
-export class VersionChooser extends React.Component<VersionChooserProps, VersionChooserState> {
+export class ElectronVersionChooser extends React.Component<VersionChooserProps, VersionChooserState> {
   constructor(props: VersionChooserProps) {
     super(props);
 

src/renderer/components/commands-node-chooser.tsx

@@ -0,0 +1,151 @@
+import { Button, ButtonGroup, MenuItem } from '@blueprintjs/core';
+import { ItemPredicate, ItemRenderer, Select } from '@blueprintjs/select';
+import { observer } from 'mobx-react';
+import * as React from 'react';
+
+import { ElectronVersion, NodeVersion, VersionState } from '../../interfaces';
+import { highlightText } from '../../utils/highlight-text';
+import { sortedNodeMap } from '../../utils/sorted-map';
+import { AppState } from '../state';
+
+const ElectronVersionSelect = Select.ofType<NodeVersion>();
+
+/**
+ * Helper method: Returns the <Select /> label for an Electron
+ * version.
+ *
+ * @param {ElectronVersion} { source, state }
+ * @returns {string}
+ */
+export function getItemLabel({ state }: NodeVersion): string {
+  let label = '';
+
+  if (state === VersionState.unknown) {
+    label = `Not downloaded`;
+  } else if (state === VersionState.ready) {
+    label = `Downloaded`;
+  } else if (state === VersionState.downloading) {
+    label = `Downloading`;
+  }
+
+  return label;
+}
+
+/**
+ * Helper method: Returns the <Select /> icon for an Electron
+ * version.
+ *
+ * @param {ElectronVersion} { state }
+ * @returns
+ */
+export function getItemIcon({ state }: NodeVersion) {
+  return state === 'ready'
+    ? 'saved'
+    : state === 'downloading' ? 'cloud-download' : 'cloud';
+}
+
+/**
+ * Helper method: Returns the <Select /> predicate for an Electron
+ * version.
+ *
+ * @param {string} query
+ * @param {ElectronVersion} { version }
+ * @returns
+ */
+export const filterItem: ItemPredicate<NodeVersion> = (query, { version }) => {
+  return version.toLowerCase().includes(query.toLowerCase());
+};
+
+/**
+ * Helper method: Returns the <Select /> <MenuItem /> for Electron
+ * versions.
+ *
+ * @param {ElectronVersion} item
+ * @param {IItemRendererProps} { handleClick, modifiers, query }
+ * @returns
+ */
+export const renderItem: ItemRenderer<NodeVersion> = (item, { handleClick, modifiers, query }) => {
+  if (!modifiers.matchesPredicate) {
+    return null;
+  }
+
+  return (
+    <MenuItem
+      active={modifiers.active}
+      disabled={modifiers.disabled}
+      text={highlightText(item.version, query)}
+      key={item.version}
+      onClick={handleClick}
+      label={getItemLabel(item)}
+      icon={getItemIcon(item)}
+    />
+  );
+};
+
+export interface VersionChooserState {
+  value: string;
+}
+
+export interface VersionChooserProps {
+  appState: AppState;
+}
+
+
+export const getVersionsFromAppState = (appState: AppState) => {
+  const { nodeVersions } = appState;
+
+  return sortedNodeMap<NodeVersion>(nodeVersions, (_key, item) => item)
+    .filter((item) => !!item);
+};
+
+/**
+ * A dropdown allowing the selection of Electron versions. The actual
+ * download is managed in the state.
+ *
+ * @class VersionChooser
+ * @extends {React.Component<VersionChooserProps, VersionChooserState>}
+ */
+@observer
+export class NodeVersionChooser extends React.Component<VersionChooserProps, VersionChooserState> {
+  constructor(props: VersionChooserProps) {
+    super(props);
+
+    this.onItemSelect = this.onItemSelect.bind(this);
+  }
+
+  /**
+   * Handle change, which usually means that we'd like update
+   * the selection version.
+   *
+   * @param {React.ChangeEvent<HTMLSelectElement>} event
+   */
+  public onItemSelect({ version }: ElectronVersion) {
+    this.props.appState.setNodeVersion(version);
+  }
+
+  public render() {
+    const { currentNodeVersion, Bisector } = this.props.appState;
+    const { version } = currentNodeVersion;
+
+    return (
+      <ButtonGroup>
+        <ElectronVersionSelect
+          filterable={true}
+          items={getVersionsFromAppState(this.props.appState)}
+          itemRenderer={renderItem}
+          itemPredicate={filterItem}
+          onItemSelect={this.onItemSelect}
+          noResults={<MenuItem disabled={true} text='No results.' />}
+          disabled={!!Bisector}
+        >
+          <Button
+            className='version-chooser'
+            text={`Node v${version}`}
+            icon={getItemIcon(currentNodeVersion)}
+            disabled={!!Bisector}
+          />
+        </ElectronVersionSelect>
+      </ButtonGroup>
+    );
+  }
+}

src/renderer/components/commands-runner.tsx

@@ -2,7 +2,7 @@ import { Button, IButtonProps, Spinner } from '@blueprintjs/core';
 import { observer } from 'mobx-react';
 import * as React from 'react';
 
-import { ElectronVersionState } from '../../interfaces';
+import { VersionState } from '../../interfaces';
 import { AppState } from '../state';
 
 export interface RunnerState {
@@ -27,11 +27,11 @@ export class Runner extends React.Component<RunnerProps, RunnerState> {
     const state = currentElectronVersion && currentElectronVersion.state;
     const props: IButtonProps = { className: 'button-run' };
 
-    if (state === ElectronVersionState.downloading) {
+    if (state === VersionState.downloading) {
       props.text = 'Downloading';
       props.disabled = true;
       props.icon = <Spinner size={16} />;
-    } else if (state === ElectronVersionState.ready) {
+    } else if (state === VersionState.ready) {
       if (isRunning) {
         props.active = true;
         props.text = 'Stop';

src/renderer/components/commands.tsx

@@ -6,9 +6,10 @@ import { AppState } from '../state';
 import { AddressBar } from './commands-address-bar';
 import { BisectHandler } from './commands-bisect';
 import { EditorDropdown } from './commands-editors';
+import { ElectronVersionChooser } from './commands-electron-chooser';
+import { NodeVersionChooser } from './commands-node-chooser';
 import { PublishButton } from './commands-publish-button';
 import { Runner } from './commands-runner';
-import { VersionChooser } from './commands-version-chooser';
 
 export interface CommandsProps {
   appState: AppState;
@@ -35,7 +36,7 @@ export class Commands extends React.Component<CommandsProps, {}> {
       <div className='commands'>
         <div>
           <ControlGroup fill={true} vertical={false}>
-            <VersionChooser appState={appState} />
+            {this.getVersionChooser()}
             <Runner appState={appState} />
           </ControlGroup>
           {
@@ -54,6 +55,12 @@ export class Commands extends React.Component<CommandsProps, {}> {
               text='Console'
               onClick={appState.toggleConsole}
             />
+            <Button
+              active={appState.isNodeMode}
+              icon='ninja'
+              text='Node.js Mode'
+              onClick={appState.toggleNodeMode}
+            />
             <EditorDropdown appState={appState} />
           </ControlGroup>
         </div>
@@ -64,4 +71,14 @@ export class Commands extends React.Component<CommandsProps, {}> {
       </div>
     );
   }
+
+  public getVersionChooser() {
+    const { appState } = this.props;
+
+    if (appState.isNodeMode) {
+      return <NodeVersionChooser appState={appState} />;
+    } else {
+      return <ElectronVersionChooser appState={appState} />;
+    }
+  }
 }

src/renderer/components/dialog-bisect.tsx

@@ -6,7 +6,7 @@ import * as React from 'react';
 import { ElectronVersion } from '../../interfaces';
 import { Bisector } from '../bisect';
 import { AppState } from '../state';
-import { filterItem, getItemIcon, getVersionsFromAppState, renderItem } from './commands-version-chooser';
+import { filterItem, getItemIcon, getVersionsFromAppState, renderItem } from './commands-electron-chooser';
 
 const ElectronVersionSelect = Select.ofType<ElectronVersion>();
 

src/renderer/components/settings-electron.tsx

@@ -12,9 +12,9 @@ import {
 import { observer } from 'mobx-react';
 import * as React from 'react';
 
-import { ElectronVersion, ElectronVersionSource, ElectronVersionState } from '../../interfaces';
+import { ElectronVersion, ElectronVersionSource, VersionState } from '../../interfaces';
 import { normalizeVersion } from '../../utils/normalize-version';
-import { sortedElectronMap } from '../../utils/sorted-electron-map';
+import { sortedElectronMap } from '../../utils/sorted-map';
 import { AppState } from '../state';
 import { ElectronReleaseChannel, getReleaseChannel } from '../versions';
 
@@ -69,7 +69,7 @@ export class ElectronSettings extends React.Component<ElectronSettingsProps, Ele
     if (!checked) {
       appState.statesToShow = appState.statesToShow.filter((s) => s !== id);
     } else {
-      appState.statesToShow.push(id as ElectronVersionState);
+      appState.statesToShow.push(id as VersionState);
     }
   }
 
@@ -202,7 +202,7 @@ export class ElectronSettings extends React.Component<ElectronSettingsProps, Ele
    */
   private renderVersionStateOptions(): JSX.Element {
     const { appState } = this.props;
-    const getIsChecked = (state: ElectronVersionState) => {
+    const getIsChecked = (state: VersionState) => {
       return appState.statesToShow.includes(state);
     };
 
@@ -211,21 +211,21 @@ export class ElectronSettings extends React.Component<ElectronSettingsProps, Ele
         label='Include Electron versions that are:'
       >
         <Checkbox
-          checked={getIsChecked(ElectronVersionState.downloading)}
+          checked={getIsChecked(VersionState.downloading)}
           label='Downloading'
           id='downloading'
           onChange={this.handleStateChange}
           inline={true}
         />
         <Checkbox
-          checked={getIsChecked(ElectronVersionState.ready)}
+          checked={getIsChecked(VersionState.ready)}
           label='Downloaded'
           id='ready'
           onChange={this.handleStateChange}
           inline={true}
         />
         <Checkbox
-          checked={getIsChecked(ElectronVersionState.unknown)}
+          checked={getIsChecked(VersionState.unknown)}
           label='Not Downloaded'
           id='unknown'
           onChange={this.handleStateChange}
@@ -350,10 +350,10 @@ export class ElectronSettings extends React.Component<ElectronSettingsProps, Ele
     let icon: IconName = 'box';
     let humanState = 'Downloaded';
 
-    if (state === ElectronVersionState.downloading) {
+    if (state === VersionState.downloading) {
       icon = 'cloud-download';
       humanState = 'Downloading';
-    } else if (state === ElectronVersionState.unknown) {
+    } else if (state === VersionState.unknown) {
       icon = 'cloud';
       humanState = 'Not downloaded';
     }

src/renderer/remote-loader.ts

@@ -3,7 +3,7 @@ import { when } from 'mobx';
 import { EditorId, EditorValues } from '../interfaces';
 import { INDEX_HTML_NAME, MAIN_JS_NAME, PRELOAD_JS_NAME, RENDERER_JS_NAME } from '../shared-constants';
 import { getOctokit } from '../utils/octokit';
-import { sortedElectronMap } from '../utils/sorted-electron-map';
+import { sortedElectronMap } from '../utils/sorted-map';
 import { ELECTRON_ORG, ELECTRON_REPO } from './constants';
 import { getContent } from './content';
 import { AppState } from './state';

src/renderer/state.ts

@@ -8,11 +8,12 @@ import {
   EditorId,
   ElectronVersion,
   ElectronVersionSource,
-  ElectronVersionState,
   MosaicId,
+  NodeVersion,
   NpmVersion,
   OutputEntry,
   OutputOptions,
+  VersionState,
   WarningDialogTexts
 } from '../interfaces';
 import { IpcEvents } from '../ipc-events';
@@ -34,14 +35,16 @@ import { activateTheme } from './themes';
 import {
   addLocalVersion,
   ElectronReleaseChannel,
+  getAllElectronVersions,
   getDefaultVersion,
-  getElectronVersions,
   getUpdatedElectronVersions,
+  getUpdatedNodeVersions,
   saveLocalVersions
 } from './versions';
 
-const knownVersions = getElectronVersions();
+const knownVersions = getAllElectronVersions();
 const defaultVersion = getDefaultVersion(knownVersions);
+const defaultNodeVersion = '12.0.0';
 
 /**
  * Editors exist outside of React's world. To make things *a lot*
@@ -66,6 +69,7 @@ window.ElectronFiddle = window.ElectronFiddle || {
 export class AppState {
   // -- Persisted settings ------------------
   @observable public version: string = defaultVersion;
+  @observable public nodeVersion: string = defaultNodeVersion;
   @observable public theme: string | null = localStorage.getItem('theme');
   @observable public gitHubAvatarUrl: string | null = localStorage.getItem('gitHubAvatarUrl');
   @observable public gitHubName: string | null = localStorage.getItem('gitHubName');
@@ -75,9 +79,9 @@ export class AppState {
   @observable public versionsToShow: Array<ElectronReleaseChannel> =
     this.retrieve('versionsToShow') as Array<ElectronReleaseChannel>
     || [ElectronReleaseChannel.stable, ElectronReleaseChannel.beta];
-  @observable public statesToShow: Array<ElectronVersionState> =
-    this.retrieve('statesToShow') as Array<ElectronVersionState>
-    || [ElectronVersionState.downloading, ElectronVersionState.ready, ElectronVersionState.unknown];
+  @observable public statesToShow: Array<VersionState> =
+    this.retrieve('statesToShow') as Array<VersionState>
+    || [VersionState.downloading, VersionState.ready, VersionState.unknown];
   @observable public isKeepingUserDataDirs: boolean = !!this.retrieve('isKeepingUserDataDirs');
   @observable public isEnablingElectronLogging: boolean = !!this.retrieve('isEnablingElectronLogging');
   @observable public isClearingConsoleOnRun: boolean = !!this.retrieve('isClearingConsoleOnRun');
@@ -85,6 +89,7 @@ export class AppState {
   // -- Various session-only state ------------------
   @observable public gistId: string = '';
   @observable public versions: Record<string, ElectronVersion> = arrayToStringMap(knownVersions);
+  @observable public nodeVersions: Record<string, NodeVersion> = arrayToStringMap([] as Array<NodeVersion>);
   @observable public output: Array<OutputEntry> = [];
   @observable public localPath: string | undefined;
   @observable public warningDialogTexts = { label: '', ok: 'Okay', cancel: 'Cancel' };
@@ -113,6 +118,7 @@ export class AppState {
   @observable public isBisectDialogShowing: boolean = false;
   @observable public isAddVersionDialogShowing: boolean = false;
   @observable public isThemeDialogShowing: boolean = false;
+  @observable public isNodeMode: boolean = false;
   @observable public isTourShowing: boolean = !localStorage.getItem('hasShownTour');
 
   // -- Editor Values stored when we close the editor ------------------
@@ -130,11 +136,13 @@ export class AppState {
     this.pushOutput = this.pushOutput.bind(this);
     this.removeVersion = this.removeVersion.bind(this);
     this.setVersion = this.setVersion.bind(this);
+    this.setNodeVersion = this.setNodeVersion.bind(this);
     this.showTour = this.showTour.bind(this);
     this.signOutGitHub = this.signOutGitHub.bind(this);
     this.toggleBisectCommands = this.toggleBisectCommands.bind(this);
     this.toggleAuthDialog = this.toggleAuthDialog.bind(this);
     this.toggleConsole = this.toggleConsole.bind(this);
+    this.toggleNodeMode = this.toggleNodeMode.bind(this);
     this.clearConsole = this.clearConsole.bind(this);
     this.toggleSettings = this.toggleSettings.bind(this);
     this.toggleBisectDialog = this.toggleBisectDialog.bind(this);
@@ -196,6 +204,7 @@ export class AppState {
 
     // Update our known versions
     this.updateElectronVersions();
+    this.updateNodeVersions();
 
     // Make sure the console isn't all empty and sad
     this.pushOutput('Console ready 🔬');
@@ -213,6 +222,18 @@ export class AppState {
     }
   }
 
+  /**
+   * Returns the current NodeVersion or the first
+   * one that can be found.
+   */
+  @computed get currentNodeVersion(): NodeVersion {
+    if (this.nodeVersions[this.nodeVersion]) {
+      return this.nodeVersions[this.nodeVersion];
+    } else {
+      return this.nodeVersions[defaultNodeVersion];
+    }
+  }
+
   /**
    * Update the Electron versions: First, fetch them from GitHub,
    * then update their respective downloaded state.
@@ -233,6 +254,21 @@ export class AppState {
     this.isUpdatingElectronVersions = false;
   }
 
+  /**
+   * Update the Node versions: First, fetch them from Node.js,
+   * then update their respective downloaded state.
+   *
+   * Fails silently.
+   */
+  @action public async updateNodeVersions() {
+    try {
+      const nodeVersions = await getUpdatedNodeVersions();
+      this.nodeVersions = arrayToStringMap(nodeVersions);
+    } catch (error) {
+      console.warn(`State: Could not update Node.js versions`, error);
+    }
+  }
+
   @action public async getName() {
     if (!this.name) {
       this.name = await getName(this);
@@ -245,6 +281,10 @@ export class AppState {
     this.isConsoleShowing = !this.isConsoleShowing;
   }
 
+  @action public toggleNodeMode() {
+    this.isNodeMode = !this.isNodeMode;
+  }
+
   @action public clearConsole() {
     this.output = [];
   }
@@ -332,7 +372,7 @@ export class AppState {
   @action public addLocalVersion(input: NpmVersion) {
     addLocalVersion(input);
 
-    this.versions = arrayToStringMap(getElectronVersions());
+    this.versions = arrayToStringMap(getAllElectronVersions());
     this.updateDownloadedVersionState();
   }
 
@@ -368,7 +408,7 @@ export class AppState {
       saveLocalVersions(versionsAsArray);
     } else {
       await this.binaryManager.remove(version);
-      updatedVersions[version].state = ElectronVersionState.unknown;
+      updatedVersions[version].state = VersionState.unknown;
     }
 
     this.versions = updatedVersions;
@@ -394,7 +434,7 @@ export class AppState {
       console.log(`State: Instructing BinaryManager to fetch v${version}`);
       const updatedVersions = { ...this.versions };
       updatedVersions[version] = updatedVersions[version] || {};
-      updatedVersions[version].state = ElectronVersionState.downloading;
+      updatedVersions[version].state = VersionState.downloading;
       this.versions = updatedVersions;
 
       await this.binaryManager.setup(version);
@@ -404,6 +444,27 @@ export class AppState {
     }
   }
 
+  /**
+   * Select a version of Node.js (and download fi necessary)
+   *
+   * @param {string} input
+   * @returns {Promise<void>}
+   */
+  @action public async setNodeVersion(input: string) {
+    const version = normalizeVersion(input);
+
+    if (!this.nodeVersions[version]) {
+      console.warn(`State: Called setNodeVersion() with ${version}, which does not exist.`);
+      this.setVersion(this.nodeVersions[0].version);
+
+      return;
+    }
+
+    console.log(`State: Switching to Node ${version}`);
+
+    this.nodeVersion = version;
+  }
+
   /**
    * Select a version of Electron (and download it if necessary).
    *
@@ -465,7 +526,7 @@ export class AppState {
 
     (downloadedVersions || []).forEach((version) => {
       if (updatedVersions[version]) {
-        updatedVersions[version].state = ElectronVersionState.ready;
+        updatedVersions[version].state = VersionState.ready;
       }
     });
     console.log(`State: Updated version state`, updatedVersions);

src/renderer/touch-bar-manager.ts

@@ -5,9 +5,9 @@ import {
 } from 'electron';
 import { autorun } from 'mobx';
 
-import { ElectronVersion, ElectronVersionState } from '../interfaces';
+import { ElectronVersion, VersionState } from '../interfaces';
 import { getNiceGreeting } from '../utils/nice-greeting';
-import { sortedElectronMap } from '../utils/sorted-electron-map';
+import { sortedElectronMap } from '../utils/sorted-map';
 import { AppState } from './state';
 
 const { TouchBar } = remote;
@@ -26,7 +26,7 @@ const {
  * @returns {string}
  */
 export function getItemIcon(
-  { state }: Partial<ElectronVersion> = { state: ElectronVersionState.unknown }
+  { state }: Partial<ElectronVersion> = { state: VersionState.unknown }
 ) {
   return state === 'ready'
     ? '💾'

src/renderer/versions.ts

@@ -1,4 +1,4 @@
-import { ElectronVersion, ElectronVersionSource, ElectronVersionState, NpmVersion } from '../interfaces';
+import { ElectronVersion, ElectronVersionSource, NodeVersion, NpmVersion, VersionState } from '../interfaces';
 import { normalizeVersion } from '../utils/normalize-version';
 
 export const enum ElectronReleaseChannel {
@@ -82,7 +82,7 @@ export const enum VersionKeys {
  * @param {() => Array<NpmVersion>} fallbackMethod
  * @returns {Array<NpmVersion>}
  */
-function getVersions(
+function getElectronVersions(
   key: VersionKeys, fallbackMethod: () => Array<NpmVersion>
 ): Array<NpmVersion> {
   const fromLs = window.localStorage.getItem(key);
@@ -117,7 +117,7 @@ function getVersions(
  * @param {VersionKeys} key
  * @param {Array<NpmVersion} versions
  */
-function saveVersions(key: VersionKeys, versions: Array<NpmVersion>) {
+function saveElectronVersions(key: VersionKeys, versions: Array<NpmVersion>) {
   const stringified = JSON.stringify(versions);
   window.localStorage.setItem(key, stringified);
 }
@@ -127,12 +127,12 @@ function saveVersions(key: VersionKeys, versions: Array<NpmVersion>) {
  *
  * @returns {Array<NpmVersion>}
  */
-export function getElectronVersions(): Array<ElectronVersion> {
+export function getAllElectronVersions(): Array<ElectronVersion> {
   const known: Array<ElectronVersion> = getKnownVersions().map((version) => {
     return {
       ...version,
       source: ElectronVersionSource.remote,
-      state: ElectronVersionState.unknown
+      state: VersionState.unknown
     };
   });
 
@@ -140,11 +140,11 @@ export function getElectronVersions(): Array<ElectronVersion> {
     return {
       ...version,
       source: ElectronVersionSource.local,
-      state: ElectronVersionState.ready
+      state: VersionState.ready
     };
   });
 
-  return [ ...known, ...local ];
+  return [...known, ...local];
 }
 
 /**
@@ -171,7 +171,7 @@ export function addLocalVersion(input: NpmVersion): Array<NpmVersion> {
  * @returns {Array<NpmVersion>}
  */
 export function getLocalVersions(): Array<NpmVersion> {
-  const versions = getVersions(VersionKeys.local, () => []);
+  const versions = getElectronVersions(VersionKeys.local, () => []);
 
   return versions;
 }
@@ -190,7 +190,7 @@ export function saveLocalVersions(versions: Array<NpmVersion | ElectronVersion>)
     return true;
   });
 
-  return saveVersions(VersionKeys.local, filteredVersions);
+  return saveElectronVersions(VersionKeys.local, filteredVersions);
 }
 
 /**
@@ -200,7 +200,7 @@ export function saveLocalVersions(versions: Array<NpmVersion | ElectronVersion>)
  * @returns {Array<NpmVersion>}
  */
 export function getKnownVersions(): Array<NpmVersion> {
-  return getVersions(VersionKeys.known, () => require('../../static/releases.json'));
+  return getElectronVersions(VersionKeys.known, () => require('../../static/releases.json'));
 }
 
 /**
@@ -209,7 +209,7 @@ export function getKnownVersions(): Array<NpmVersion> {
  * @param {Array<NpmVersion>} versions
  */
 export function saveKnownVersions(versions: Array<NpmVersion>) {
-  return saveVersions(VersionKeys.known, versions);
+  return saveElectronVersions(VersionKeys.known, versions);
 }
 
 /**
@@ -222,20 +222,66 @@ export function saveKnownVersions(versions: Array<NpmVersion>) {
 export async function getUpdatedElectronVersions(
 ): Promise<Array<ElectronVersion>> {
   try {
-    await fetchVersions();
+    await fetchElectronVersions();
   } catch (error) {
-    console.warn(`Versions: Failed to fetch versions`, { error });
+    console.warn(`Versions: Failed to fetch Electron versions`, { error });
   }
 
-  return getElectronVersions();
+  return getAllElectronVersions();
+}
+
+export async function getUpdatedNodeVersions(): Promise<Array<NodeVersion>> {
+  try {
+    return await fetchNodeVersions();
+  } catch (error) {
+    console.warn(`Versions: Failed to fetch Node.js versions`, { error });
+  }
+
+  return [];
 }
 
 /**
- * Fetch the latest known versions directly from npm.
+ * Fetch the latest known Node.js versions directly from Node.js.
+ *
+ * @returns {Promise<Array<NpmVersion>>}
+ *
+ * let entry = {
+ *  "headers": 1,
+ *  "linux-arm64": 2,
+ *  "linux-x64": 6,
+ *  "osx-x64-tar": 8,
+ *  "win-x64-zip": 14,
+ *  "win-x86-zip": 18
+ * }
+ *
+ *  nodejs.org/dist/${version}/node-${version}-${files[entry]}.file-ext
+ * ^ for windows, take the plat and extend with the file extension in the identifier above
+ */
+export async function fetchNodeVersions() {
+  const channels = [
+    `https://nodejs.org/dist/index.json`
+  ];
+
+  let output: Array<NodeVersion> = [];
+
+  for (const channelUrl of channels) {
+    const response = await window.fetch(channelUrl);
+    const versions = await response.json();
+
+    output = versions.map((input: any) => ({
+      version: normalizeVersion(input.version)
+    }));
+  }
+
+  return output;
+}
+
+/**
+ * Fetch the latest known Electron versions directly from npm.
  *
  * @returns {Promise<Array<NpmVersion>>}
  */
-export async function fetchVersions() {
+export async function fetchElectronVersions() {
   const channels = [
     `https://registry.npmjs.org/electron`,        // stable, beta
     `https://registry.npmjs.org/electron-nightly` // nightly

src/utils/array-to-stringmap.ts

@@ -1,4 +1,4 @@
-import { ElectronVersion } from '../interfaces';
+import { Version } from '../interfaces';
 import { normalizeVersion } from './normalize-version';
 
 /**
@@ -8,9 +8,9 @@ import { normalizeVersion } from './normalize-version';
  * @param {Array<ElectronVersion>} input
  * @returns {Record<string, ElectronVersion>}
  */
-export function arrayToStringMap(
-  input: Array<ElectronVersion>
-): Record<string, ElectronVersion> {
+export function arrayToStringMap<T extends Version>(
+  input: Array<T>
+): Record<string, T> {
   const output = {};
 
   input.forEach((version) => {

src/utils/sorted-map.ts

@@ -1,6 +1,6 @@
 import * as semver from 'semver';
 
-import { ElectronVersion } from '../interfaces';
+import { ElectronVersion, NodeVersion } from '../interfaces';
 
 /**
  * Sorts Electron versions and returns the result of a
@@ -13,6 +13,28 @@ import { ElectronVersion } from '../interfaces';
 export function sortedElectronMap<T>(
   versions: Record<string, ElectronVersion>,
   mapFn: (key: string, version: ElectronVersion) => T
+) {
+  return sortedMap<ElectronVersion, T>(versions, mapFn);
+}
+
+/**
+ * Sorts Node versions and returns the result of a
+ * map function.
+ *
+ * @param {Record<string, NodeVersion>} versions
+ * @param {(key: string, version: NodeVersion) => void} mapFn
+ * @returns {Array<T>}
+ */
+export function sortedNodeMap<T>(
+  versions: Record<string, NodeVersion>,
+  mapFn: (key: string, version: NodeVersion) => T
+) {
+  return sortedMap<NodeVersion, T>(versions, mapFn);
+}
+
+function sortedMap<T1, T2>(
+  versions: Record<string, T1>,
+  mapFn: (key: string, version: T1) => T2
 ) {
   return Object.keys(versions)
     .sort((a, b) => {
@@ -30,5 +52,5 @@ export function sortedElectronMap<T>(
 
       return semver.gt(a, b, true) ? -1 : 1;
     })
-    .map((key) => mapFn(key, versions[key])) as Array<T>;
+    .map((key) => mapFn(key, versions[key])) as Array<T2>;
 }