SN TypeScript Util

A TypeScript CLI utility that works on-top of the ServiceNow Extension for VS Code. This tool activates a TypeScript-based workflow for ServiceNow developers using VS Code.

Table of Contents

1. Benefits
2. Prerequisites
3. Installation and Setup
4. Basic Workflow
5. Commands
6. Project Structure
7. License

Benefits

Using TypeScript, the CLI provides an enhanced developer workflow.

• Work in modern JavaScript ES2015 (ES6) and beyond
• Extend JavaScript by using types
• Unlock code navigation and intelligent code completion
• Catch bugs before syncing to the instance

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Prerequisites

• Node.js
• ServiceNow Extension for VS Code
• An imported application in VS Code

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Installation and Setup

Install the npm package.

npm install -g sn-typescript-util

Build the TypeScript and configuration files. This only needs to be done once for an application.

snts --build

In the application directory created by the ServiceNow Extension for VS Code, the build creates a ts directory from the JavaScript files in the src directory. This is where all the TypeScript code resides and where the workflow begins.

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Basic Workflow

After installation & setup, simply run the TypeScript compiler --watch command to start looking for TypeScript code changes in the ts directory.

tsc --watch

Any JavaScript ES2015 (ES6) code added will get converted down to ES5 and moved to the src directory. Then changes are ready to sync with the target instance using the ServiceNow Extension for VS Code.

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Commands

Installing the CLI globally provides access to the snts command.

snts [command]

Build

Build project utility files and package dependencies. Creates a ts directory from the JavaScript files in the src directory.

snts --build

# or

snts -b

Compile

Compile TypeScript files in the ts directory to JavaScript ES5 and moves them to the src directory.

snts --compile

# or

snts -c

Help

Display help for the command.

snts --help

# or

snts -h

Remove

Remove & clean the ts build directory.

snts --remove

# or

snts -r

Sync

Sync new instance-based src files to the ts directory.

snts --sync

# or

snts -s

Version

Output the version number.

snts --version

# or

snts -v

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Project Structure

Inside of the application directory (after the build), the project structure will look something like this.

/
├── background scripts/
├── scratch/
├── src/
│   ├── Server Development/
│   │   └── Script Includes/
│   │       └── DataService.script.js
│   │       └── Utils.script.js
│   └── Service Portal/
│       └── Widgets/
│           └── Dashboard/
│               └── Dashboard.client_script.js
│               └── Dashboard.css.scss
│               └── Dashboard.demo_data.json
│               └── Dashboard.link.js
│               └── Dashboard.option_schema.json
│               └── Dashboard.script.js
│               └── Dashboard.template.html
├── system/
├── ts/
│   ├── Server Development/
│   │   └── Script Includes/
│   │       └── DataService.script.ts
│   │       └── Utils.script.ts
│   ├── Service Portal/
│   │   └── Widgets/
│   │       └── Dashboard/
│   │           └── Dashboard.client_script.ts
│   │           └── Dashboard.link.ts
│   │           └── Dashboard.script.ts
│   └── Types/
│       └── BaseTable.ts
│       └── User.ts
├── .eslintrc
└── app.config.json

This example project has two script includes, a widget, and a Types directory for interfaces & types.

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License

MIT License

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