first-run

first-run

Check if it's the first time the process is run

Can be used to greet the user the first time they use your CLI app, show usage tip, initialize something, etc.

Install

npm install first-run

Usage

// x.js
import isFirstRun from 'first-run';

console.log(isFirstRun({name: 'x'}));

$ node x.js
true
$ node x.js
false

API

isFirstRun(options)

clearFirstRun(options)

Clear the state.

isFirstRunForVersion(options)

Check if it's the first time the process is run for this specific version.

Each version is tracked independently from the main isFirstRun() function and from other versions.

clearFirstRunForVersion(options)

Clear the state for a specific version.

Example

import {isFirstRunForVersion, clearFirstRunForVersion} from 'first-run';

console.log(isFirstRunForVersion({name: 'my-app', version: '2.1.0'}));
//=> true

console.log(isFirstRunForVersion({name: 'my-app', version: '2.1.0'}));
//=> false

// Clear the state for version 2.1.0
clearFirstRunForVersion({name: 'my-app', version: '2.1.0'});

console.log(isFirstRunForVersion({name: 'my-app', version: '2.1.0'}));
//=> true (cleared!)

console.log(isFirstRunForVersion({name: 'my-app', version: '2.2.0'}));
//=> true (new version!)

This is useful for:

• Showing version-specific onboarding or upgrade messages
• Running migration code for new versions
• Tracking feature rollouts per version
• Testing version-specific initialization logic

options

Type: object

name

Type: string
Required

The name used to identify it.

Usually, you would fetch the name field from package.json.

version

Type: string
(Only for isFirstRunForVersion and clearFirstRunForVersion)

The version to track separately. Each version will be tracked independently.