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  • 🚀Get Started
    • What is JourneyApps Platform?
    • Tutorial: Build your First App
      • 1. Introduction
      • 2. Create a new App
      • 3. OXIDE IDE Overview
      • 4. Hello World app
      • 5. The Data Model
      • 6. View Components
      • 7. Queries and Data Sync
      • 8. Simple Navigation
      • 9. View Stack
      • 10. Input Validation
      • 11. View Parameters
      • 12. Data Manipulation
      • 13. Responsive Apps
      • 14. Styling
      • 15. Lists
      • 16. GPS Capturing
      • 17. Relationships
      • 18. Multiple User Roles
      • 19. Deployment and Users
      • 20. Version Control
      • 21. CSV and APIs
      • 22. Conclusion
    • JourneyApps Platform Fundamentals
      • Creating a New App
        • Git-enabled Apps
      • What are Views?
      • What is the Data Model?
      • JourneyApps Syntax Basics
      • Access the Database (DB)
        • Manipulate DB Objects
        • Query DB Objects
      • View Navigation
        • Deep Linking
      • CloudCode Overview
      • OXIDE (Online IDE)
  • 💻Build your App
    • JourneyApps Syntax
      • Syntax Basics
      • Access the DB
      • View Navigation
      • Async & Await
      • TypeScript Apps (Beta)
        • runtime-build package
        • TypeScript App Troubleshooting
      • What's New in V4
        • Updating to the V4 API
    • Configure your Data Model
      • What is the data model?
      • Reference: model
        • field
        • belongs-to
        • has-many
        • index
      • Data Rules
        • Data Buckets
        • Sync Rules - Limit data synced to devices
        • Data ACLs - Limit access to data
        • Real-world example for Data Rules
        • ❔FAQs
        • Migrate to Data Rules
      • App Indexes
      • Webhooks
    • UI Components
      • All UI Components
        • actionSheet
        • Attachments
        • button
        • button-group
        • capture-coordinates
          • marker
          • marker-query
        • capture-file
        • capture-photo
        • capture-signature
        • card
          • accent
          • action
        • columns
          • column
        • component
        • context-menu
          • divider
          • item
        • CSV
        • date-input
        • datetime-input
        • dialog
          • body
        • display-3d-model
          • 📖display-3d-model Guides
            • Guide 1: Initialize and layout a 3D model in a view
            • Guide 2: Control playback position
            • Guide 3: Troubleshooting controls
        • display-coordinates
        • display-file
        • display-image
        • display-photo
        • display-signature
        • heading
        • html
          • HTML Advanced Topics
          • ❔HTML FAQs
          • 📖Guide: HTML & JourneyApps iFrame Client
        • icons
        • info
        • info-table
          • row
        • journey.photos (capture multiple photos)
        • JourneyPrinter (print PDFs)
        • grid
          • cell
          • 📖grid Examples
        • list
          • list-item
            • accent
            • asset
            • pills
              • pill
            • action
        • multiple-choice-checklist
        • navigation (Navigation drawer)
          • general-section
            • item
          • section
            • item
              • item
          • ❔navigation FAQs
        • notification
        • object-dropdown
        • object-list
          • action
        • object-repeat
        • object-table
          • action
          • column
            • action
            • edit-boolean
            • edit-date
            • edit-datetime
            • edit-integer
            • edit-number
            • edit-select
            • edit-text
            • edit-time
            • edit-typeahead
              • action
            • header-action
          • column-group
          • empty-action
          • 📖object-table Guides
            • Actions
            • Cell callouts
            • Column groups
            • Columns
            • Controlled object-table
            • Controls
            • Copy & paste data
            • Edit cells
            • Filters
            • Frozen columns
            • Fullscreen object-table
            • Mode
            • State
            • Styles
        • optionList
        • PhotonSync (transfer data offline)
        • power-bi
          • 📖Guide: PowerBI Embedding
        • scan-barcode
        • shortcut
        • sidebar
        • single-choice-dropdown
        • single-choice-radio
        • template
        • text-input
        • time-input
        • toggle
        • view
      • JS/TS Events
      • Show / Hide UI Components
      • View Templates
      • XML Fields (Attributes)
        • align-content
        • align-controls
        • align-label
        • bind
        • clear-button-visibility
        • control-order
        • disabled
        • error-message
        • icon-position
        • id
        • hide-if
        • modifier-text
        • label
        • label-case
        • label-color
        • on-change
        • on-press
        • placeholder
        • required
        • show-if
    • JS / TS APIs
      • Attachment
      • Bluetooth (Beta)
      • Broadcast
      • component
      • CSV
      • DB
      • HardwareBarcode
      • journey
        • journey.config
        • journey.container
        • journey.device
        • journey.diagnostics
        • journey.dialog
        • journey.files
        • journey.hardware
        • journey.photos
        • journey.runtime
        • journey.sensors
        • journey.viewStack
      • JourneyPrinter
      • KeyboardBarcode
      • LocalDB
      • NFC
      • OnlineDB
      • PhotonSync
      • SerialPort
      • ShortcutManager
      • TCPSocket
      • user
    • Extend your App with Custom Code
      • App packages
        • App packages overview
        • PDF report package
        • TypeScript library & unit tests
        • Manage External Dependencies
      • Custom HTML
    • Style & Customize your App
      • Style & configure UI components
        • Overview
        • Understand extendable themes
        • Use themes on a view
        • Theme specific components on a view
        • Examples
        • Debugging
        • ❔FAQs
      • Change your App Font
      • Custom Branding
        • Custom Container Features
        • Special Requirements for iOS Containers
    • Integrate your App
      • Backend integrations with CloudCode
      • Barcode Scanning
        • Barcode Scanning using Keyboard Emulation
        • Hardware Barcode Scanning
        • scan-barcode
      • Bluetooth Low Energy (BLE)
      • Broadcast API
      • HTTP requests (Fetch API)
      • JourneyApps Print (Android)
      • Maps and navigation
      • NFC
      • Opening external links/apps
      • Serial Port
      • TCP Sockets
    • Design Intuitive Apps
      • UX Guidelines
      • Write Effective Copy
  • 📱App Features
    • RealWear® Voice Control
      • Automatic Voice Commands
        • Automatic Voice Commands - Advanced
      • Manual Voice Commands
    • App, Runtime and Container Updates
    • Batch Operations (App)
    • Call JS/TS Functions from XML
    • Capture GPS Locations
    • Push Notifications
    • Translations
    • XML Format Strings
    • Webhooks (External)
  • 🌐CloudCode
    • CloudCode Overview
    • Trigger a CloudCode Task
      • Trigger CC with a Schedule
      • Trigger CC via a Webhook
      • Trigger CC from an App
      • Trigger CC from Another Task
      • Trigger CC via HTTP
    • Attachments in CloudCode
    • Timezones
    • Advanced CloudCode Topics
      • Access Multiple DBs in CloudCode Tasks
      • Batch API (CloudCode)
      • CloudCode Dependencies
      • Configure HTTPS in CloudCode
      • Deployment environment variables
      • Local CloudCode Development
      • PDF Reports using CloudCode
      • Shared CloudCode Tasks
      • Translations in CloudCode
  • 📥Backend API
    • Introduction
    • API Reference
      • Retrieve All Objects
      • Query Objects
      • Sort Results
      • Limit and Skip
      • Count Objects
      • Create a New Object
      • Retrieve a Single Object
      • Update a Single Object
      • Delete a Single Object
      • Batch Operations (v4 API)
      • Oplog API
      • Retrieve the App Data Model
      • Manage App Users and Sessions
      • Field Representation
      • Error Responses
    • API Limits
    • Update to the V4 API
  • ⚙️Technical
    • Data Synchronization Priority
    • Device Diagnostics
    • JSON1 Query Engine
    • Improve App Performance
    • Security Measures
    • Supported Platforms
      • Web Container
      • Windows Installer
    • Domain Whitelist
  • 🖥️OXIDE
    • Get started with OXIDE
      • OXIDE Overview
      • Components of OXIDE
    • Configure Testing Deployments
    • Edit and Manage Files
      • How to Navigate to a Function
      • Manage External Dependencies
    • Create and Manage App Containers
    • Debugging & Troubleshooting
      • Common Troubleshooting Pointers
      • App Diagnostics Reports
      • Build Logs
    • OXIDE Workspaces
      • OXIDE Trees
  • ❕Deprecated Features
    • Deprecated Features and Components
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On this page
  • Overview
  • Asynchronous functions
  • SharedJS / App modules
  • App packages
  • Node.js packages
  • Default TypeScript settings
  • Migrating an app to TypeScript
  1. Build your App
  2. JourneyApps Syntax

TypeScript Apps (Beta)

PreviousAsync & AwaitNextruntime-build package

Last updated 2 years ago

TypeScript App mode is currently in Beta.

TypeScript mode gives improved development tooling and performance for apps.

Overview

Highlights for apps in TypeScript mode include:

  • Support for modern JavaScript and TypeScript syntax

  • Build-time type checking, reducing errors and improving auto-complete

  • async/await support, allowing control over concurrency

  • App module support for sharing code across views

  • App package support for managing sub-projects within the app codebase

  • NPM dependency support for sharing code across apps, or including external libraries

Asynchronous functions

In standard JourneyApps apps, many functions appear synchronous, even though asynchronous execution occurs behind the scenes.

In TypeScript mode, these functions are all explicitly asynchronous, and return a Promise. It is recommended to use the await keyword with these functions.

The database APIs function the same as in CloudCode. See the for details.

Other notable async functions include fetch, journey.dialog, actionSheet, optionList.

Tip

Async functions and Promises are highlighted using italics in OXIDE. Use this as a hint for when to use the await keyword.

SharedJS / App modules

In standard JourneyApps apps, SharedJS (app.js in OXIDE) is available to define global functions, usable from any view. In TypeScript mode, this is replaced with app modules. These are files that can be imported from views.

By default, app modules are created in a lib folder. These can be imported into your views by including import * as mymodule from "~/lib/mymodule" at the top of your view TS. See an example below.

Example

Send a push notification from a view using a global function from an app module:

lib/index.ts
export async function createPushNotification(user, message) {
    var pushNotification = DB.push_notification.create();
    pushNotification.message = message;
    pushNotification.created_at = new Date();
    pushNotification.user(user);
    await pushNotification.save();
}
main.ts
import * as shared from "~/lib/index"

// This function is called when the app navigates to this view (using a link)
async function init() {
    // initialize any data here that should be available when the view is shown
    await shared.createPushNotification(user, "A new job was assigned to you");
}

Tip

Add the App Modules panel (available from the command palette) to your views workspace to make it easier to manage your modules.

App packages

Node.js packages

Node.js package dependencies can be added and imported from views.

Some restrictions:

  • Types for the package are used during the build and deploy process, but not available during editing in OXIDE yet.

  • The package must be compatible with Webpack without using additional loaders or configuration.

  • DOM APIs are not available. It is not possible to add any form of visual components via NPM dependencies yet.

  • XMLHttpRequest is not available. The package must use fetch instead.

Example - Add a Node.js package to your app and import it from a view

See this section about adding/managing external dependencies:

main.ts
import {DateTime} from 'luxon'

// This function is called when the app navigates to this view (using a link)
async function init() {
    // initialize any data here that should be available when the view is shown
    var currentDate = DateTime.now().toFormat('MM-dd-yyyy');
}

Default TypeScript settings

The default TypeScript version for apps is >= 4.1.3 but is exactly specified within an app's yarn.lock file. The default TSConfig settings for apps include the following:

tsconfig.json
...
target: 'ES2017',
module: 'ES2015',
esModuleInterop: true,
moduleResolution: 'node',
lib: ['es2018', 'webworker'],
outDir: 'lib',
skipLibCheck: true,
noEmitOnError: true,
baseUrl: '.’
...

Migrating an app to TypeScript

  1. Commit any changes to the app.

  2. Run the Migrate app to TypeScript action in OXIDE (via the command palette). Note that this action is only available in advanced IDE mode.

The action does the following automatically:

  1. Add package.json and yarn.lock files to the project.

  2. Rename view scripts from .js -> .ts.

  3. Move SharedJS to lib/index.ts.

No code changes are performed automatically. Once the above migration has completed, code will have to be fixed in each view. At this point, attempting to deploy may result in a large number of build errors.

Generally, OXIDE should pick up a large portion of code changes that must be performed. Some of these have quick-fixes available. Most notably, since many APIs are now async, the code must be updated to include await in the relevant places.

Once OXIDE doesn't display any errors in view code anymore, deploy and test the application.

Functions defined in app modules must be explicitly exported and imported to be used from views. For details, see the .

App packages are available as a way to manage custom sub-projects within your application's codebase. Please see for further information.

The code runs in the context of a . Many standard browser APIs are not available, and some Web Worker APIs are also disabled.

After adding the Node.js package to your app it can be imported in any of your app's views. In this example we are formatting a date using :

💻
async & await documentation
TypeScript handbook
the documentation
Web Worker
Manage External Dependencies
luxon