JSPM – package-build-stats@7.2.4

Package Exports

package-build-stats

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (package-build-stats) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

This is the function that powers the core of building, minifying and gzipping of packages in bundlephobia.

Usage

const { getPackageStats } = require('package-build-stats')

Building packages from npm

Building the latest stable version

const results = await getPackageStats('moment')

Building a specific version / tag

const results = await getPackageStats('moment@2.24.0')

Building local packages (beta)

const results = await getPackageStats('~/dev/my-npm-package') // must have a package.json

Passing options to the build

const results = await getBuiltPackageStats('moment', options)

Options

Option	Values	Default	Description
client	`npm` or `yarn`	`npm`	Which client to use to install package for building
limitConcurrency	`true` or `false`	`false`	When using `yarn` as the client, use the network mutex to limit concurrency
networkConcurrency	`number`	`false`	When using `yarn` as client, limit simultaneous installs to this number.
customImports	`Array<string>`	`null`	By default, the default export is used for calculating sizes. Setting this option allows calculation of package stats based on more granular top-level exports.
minifier	`terser` or `esbuild`	`terser`	ESbuild is faster, albeit with marginally larger file sizes

Listening to events

package-build-stats emits various lifecycle events when building a package. You can listen to these events by subscribing to the event emitter (based on mitt).

import { eventQueue } from 'package-build-stats'

// Listen to all events
eventQueue.on('*', callback)

// Listen to specific events
eventQueue.on('TASK_PACKAGE_BUILD', callback)

For a list of all events, see this.

Contributing

See contributing guide.