# yarn
yarn add --dev monosize
# npm
npm install --save-dev monosize
Note:
monosize
requires building packages first before doing any kind of measurements. Make sure to accommodate this in your pipeline
Fixtures declare exports that should be measured by the monosize
tool. Fixtures are created inside each package.
For example:
import { Component } from '@library/component';
export { Component };
// π "export" is required to be able to measure the size of the component
export default {
name: 'Component',
// π defines a name for a fixture that will be used in output
};
You need to create a monosize.config.mjs
in the root of your project directory (next to package.json
) to configure storage and bundler adapters.
my-proj/
ββ src/
ββ monosize.config.mjs
ββ node_modules/
ββ bundle-size/
β ββ Fixture.fixture.js
ββ package.json
A global configuration can also be used for monorepo scenarios:
my-proj-a/
ββ src/
ββ node_modules/
ββ bundle-size/
β ββ Fixture.fixture.js
ββ package.json
my-proj-b/
ββ src/
ββ node_modules/
ββ bundle-size/
β ββ Fixture.fixture.js
ββ package.json
monosize.config.mjs
// monosize.config.mjs
import storageAdapter from 'monosize-storage-*';
import webpackBundler from 'monosize-bundler-webpack';
/** @type {import('monosize').MonoSizeConfig} */
const config = {
repository: 'https://github.com/__ORG__/__REPOSITORY__',
storage: storageAdapter(),
bundler: webpackBundler(config => {
// customize config here
return config;
}),
// Optional `compare-reports`/`upload-reports` commands config overrides
reportResolvers: {
packageRoot: async reportFile => {
// provide custom logic on how to resolve package root
return '...';
},
packageName: async packageRoot => {
// provide custom logic on how to resolve packageName used within reports
return '...';
},
},
};
export default config;
To build fixtures and produce artifacts you need to use a bundler adapter. Following adapters are available:
To store reference results and run comparisons you need to use a storage adapter. Following adapters are available:
measure
monosize measure [--debug] [--artifacts-location] [--fixtures] [--quiet]
Builds fixtures and produces artifacts. For each fixture:
[fixture].fixture.js
- a modified fixture without a default export, used by a bundler[fixture].output.js
- a fully minified file, used for measurements[fixture].debug.js
- a partially minified file, useful for debugging (optional, if --debug
is passed)Produces a report file (dist/bundle-size/monosize.json
) that is used by other steps.
artifacts-location
- defines relative path from the package root where the artifact files will be stored (monosize.json
& bundler output). If specified, --report-files-glob
in monosize collect-reports
& monosize upload-reports
should be set accordingly.fixtures
- optional argument to pass a fixture filename or globbing pattern. If not specified, all fixture files matching a *.fixture.js
pattern will be measured.monosize measure --fixtures ba*
- matches any fixtures with filenames starting with ba
monosize measure --fixtures Fixture.fixture.js
- matches a fixture with the exact filename
compare-reports
Compares local (requires call of monosize measure
first) and remote results, provides output to CLI or to a Markdown file.
monosize compare-reports --branch=main --output=["cli"|"markdown"] [--deltaFormat=["delta"|"percent"]] [--report-files-glob] [--quiet]
[!TIP] In order to resolve package name used within report, we look for
package.json
orproject.json
by default to identify project root and use#name
property from obtained configuration. If you have custom solution that needs changes please use monosize configuration API (MonoSizeConfig.reportResolvers
).
branch
- the branch to compare the results with, usually main
output
- defines the output formatter, either cli
or markdown
deltaFormat
- defines the format of the delta column, either delta
or percent
report-files-glob
- defines a glob pattern to search for report files, defaults to packages/**/dist/bundle-size/monosize.json
upload-report
[!CAUTION] Should be called only during CI builds.
[!TIP] Requires a configured storage adapter.
[!TIP] In order to resolve package name used within report, we look for
package.json
orproject.json
by default to identify project root and use#name
property from obtained configuration. If you have custom solution that needs changes please use monosize configuration API (MonoSizeConfig.reportResolvers
).
monosize upload-report --branch=main --commit-sha=HASH [--report-files-glob] [--quiet]
Aggregates local results to a single report and uploads data to Azure Table Storage.
branch
- the branch to compare the results with, usually main
commit-sha
- the commit SHA to associate the report withreport-files-glob
- defines a glob pattern to search for report files, defaults to packages/**/dist/bundle-size/monosize.json
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