rollup-plugin-gzip

rollup-plugin-gzip

Creates a compressed .gz artifact for your Rollup bundle.

COMPATIBILITY NOTE: Version 2.x is compatible with rollup 0.60 and above! For older versions of rollup, use version 1.x of this plugin.

Installation

npm install --save-dev rollup-plugin-gzip

Usage

import { rollup } from 'rollup'
import gzipPlugin from 'rollup-plugin-gzip'

rollup({
    input: 'src/index.js',
    plugins: [gzipPlugin()],
}).then(/* ... */)

NOTE: This plugin is an ES module. If you import it using require(), you have to point to the default export via require('rollup-plugin-gzip').default

Configuration

filter RegExp | (fileName: string) => boolean

Control which of the output files to compress.

Defaults to /\.(js|mjs|json|css|html)$/

gzipOptions object

GZIP compression options, see https://nodejs.org/api/zlib.html#zlib_class_options

minSize number

Specified the minimum size in Bytes for a file to get compressed. Files that are smaller than this threshold will not be compressed. This does not apply to the files specified through additionalFiles!

additionalFiles string[]

This option allows you to compress additional files outside of the main rollup bundling process.

additionalFilesDelay number

This options sets a delay (ms) before the plugin compresses the files specified through additionalFiles.

Defaults to 0 for Rollup >= 2.0.0, 2000 for older versions of Rollup

customCompression (content: string | Buffer) => string | Buffer | Promise<string | Buffer>

Set a custom compression algorithm. The function can either return the compressed contents synchronously, or otherwise return a promise for asynchronous processing.

fileName string | (fileName: string) => string

Set a custom file name convention for the compressed files. Can be a suffix string or a function returning the file name.

Defaults to ".gz"

Examples

NOTE: These examples use Rollup's JavaScript API. For Rollup configuration file examples, check out the /examples directory.

Brotli Compression

Since Node 11.7.0 you can use Node's built-in Brotli compression:

import { brotliCompressSync } from 'zlib'
import { rollup } from 'rollup'
import gzipPlugin from 'rollup-plugin-gzip'

rollup({
    input: 'src/index.js',
    plugins: [
        gzipPlugin({
            customCompression: content =>
                brotliCompressSync(Buffer.from(content)),
            fileName: '.br',
        }),
    ],
}).then(/* ... */)

For Node < 11.7.0 you need the external brotli module:

import { compress } from 'brotli'
import { rollup } from 'rollup'
import gzipPlugin from 'rollup-plugin-gzip'

rollup({
    input: 'src/index.js',
    plugins: [
        gzipPlugin({
            customCompression: content => compress(Buffer.from(content)),
            fileName: '.br',
        }),
    ],
}).then(/* ... */)

Zopfli Compression

Zopfli support is available through several different external packages, each of which comes with advantages and disadvantages:

• node-zopfli (or node-zopfli-es) - native version, longer installation time, might require build tooling

import { gzipSync } from 'node-zopfli'
import { rollup } from 'rollup'
import gzipPlugin from 'rollup-plugin-gzip'

rollup({
    input: 'src/index.js',
    plugins: [
        gzipPlugin({
            customCompression: content => gzipSync(Buffer.from(content)),
        }),
    ],
}).then(/* ... */)

• @gfx/zopfli - WebAssembly version, faster installation, slower compression

import { gzipAsync } from '@gfx/zopfli'
import { rollup } from 'rollup'
import gzipPlugin from 'rollup-plugin-gzip'

rollup({
    input: 'src/index.js',
    plugins: [
        gzipPlugin({
            customCompression: content =>
                gzipAsync(Buffer.from(content), { numiterations: 15 }),
        }),
    ],
}).then(/* ... */)

Compressing into multiple formats

To support compressing your bundle into multiple different formats, you can add this plugin multiple times with different configurations:

import { brotliCompressSync } from 'zlib'
import { rollup } from 'rollup'
import gzipPlugin from 'rollup-plugin-gzip'

rollup({
    input: 'src/index.js',
    plugins: [
        // GZIP compression as .gz files
        gzipPlugin(),
        // Brotil compression as .br files
        gzipPlugin({
            customCompression: content =>
                brotliCompressSync(Buffer.from(content)),
            fileName: '.br',
        }),
    ],
}).then(/* ... */)

License

MIT