219 lines
9.5 KiB
Markdown
219 lines
9.5 KiB
Markdown
|
[![npm][npm]][npm-url]
|
||
|
|
[![node][node]][node-url]
|
||
|
|
[![deps][deps]][deps-url]
|
||
|
|
[![tests][tests]][tests-url]
|
||
|
|
[![downloads][downloads]][downloads-url]
|
||
|
|
|
||
|
|
<div align="center">
|
||
|
|
<a href="https://github.com/webpack/webpack">
|
||
|
|
<img width="200" height="200"
|
||
|
|
src="https://webpack.js.org/assets/icon-square-big.svg">
|
||
|
|
</a>
|
||
|
|
<h1>Webpack Bundle Analyzer</h1>
|
||
|
|
<p>Visualize size of webpack output files with an interactive zoomable treemap.</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h2 align="center">Install</h2>
|
||
|
|
|
||
|
|
```bash
|
||
|
|
# NPM
|
||
|
|
npm install --save-dev webpack-bundle-analyzer
|
||
|
|
# Yarn
|
||
|
|
yarn add -D webpack-bundle-analyzer
|
||
|
|
```
|
||
|
|
|
||
|
|
<h2 align="center">Usage (as a plugin)</h2>
|
||
|
|
|
||
|
|
```js
|
||
|
|
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
plugins: [
|
||
|
|
new BundleAnalyzerPlugin()
|
||
|
|
]
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
It will create an interactive treemap visualization of the contents of all your bundles.
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
This module will help you:
|
||
|
|
|
||
|
|
1. Realize what's *really* inside your bundle
|
||
|
|
2. Find out what modules make up the most of its size
|
||
|
|
3. Find modules that got there by mistake
|
||
|
|
4. Optimize it!
|
||
|
|
|
||
|
|
And the best thing is it supports minified bundles! It parses them to get real size of bundled modules.
|
||
|
|
And it also shows their gzipped sizes!
|
||
|
|
|
||
|
|
<h2 align="center">Options (for plugin)</h2>
|
||
|
|
|
||
|
|
```js
|
||
|
|
new BundleAnalyzerPlugin(options?: object)
|
||
|
|
```
|
||
|
|
|
||
|
|
|Name|Type|Description|
|
||
|
|
|:--:|:--:|:----------|
|
||
|
|
|**`analyzerMode`**|One of: `server`, `static`, `disabled`|Default: `server`. In `server` mode analyzer will start HTTP server to show bundle report. In `static` mode single HTML file with bundle report will be generated. In `disabled` mode you can use this plugin to just generate Webpack Stats JSON file by setting `generateStatsFile` to `true`. |
|
||
|
|
|**`analyzerHost`**|`{String}`|Default: `127.0.0.1`. Host that will be used in `server` mode to start HTTP server.|
|
||
|
|
|**`analyzerPort`**|`{Number}`|Default: `8888`. Port that will be used in `server` mode to start HTTP server.|
|
||
|
|
|**`reportFilename`**|`{String}`|Default: `report.html`. Path to bundle report file that will be generated in `static` mode. It can be either an absolute path or a path relative to a bundle output directory (which is output.path in webpack config).|
|
||
|
|
|**`defaultSizes`**|One of: `stat`, `parsed`, `gzip`|Default: `parsed`. Module sizes to show in report by default. [Size definitions](#size-definitions) section describes what these values mean.|
|
||
|
|
|**`openAnalyzer`**|`{Boolean}`|Default: `true`. Automatically open report in default browser.|
|
||
|
|
|**`generateStatsFile`**|`{Boolean}`|Default: `false`. If `true`, webpack stats JSON file will be generated in bundle output directory|
|
||
|
|
|**`statsFilename`**|`{String}`|Default: `stats.json`. Name of webpack stats JSON file that will be generated if `generateStatsFile` is `true`. It can be either an absolute path or a path relative to a bundle output directory (which is output.path in webpack config).|
|
||
|
|
|**`statsOptions`**|`null` or `{Object}`|Default: `null`. Options for `stats.toJson()` method. For example you can exclude sources of your modules from stats file with `source: false` option. [See more options here](https://webpack.js.org/configuration/stats/). |
|
||
|
|
|**`excludeAssets`**|`{null\|pattern\|pattern[]}` where `pattern` equals to `{String\|RegExp\|function}`|Default: `null`. Patterns that will be used to match against asset names to exclude them from the report. If pattern is a string it will be converted to RegExp via `new RegExp(str)`. If pattern is a function it should have the following signature `(assetName: string) => boolean` and should return `true` to *exclude* matching asset. If multiple patterns are provided asset should match at least one of them to be excluded. |
|
||
|
|
|**`logLevel`**|One of: `info`, `warn`, `error`, `silent`|Default: `info`. Used to control how much details the plugin outputs.|
|
||
|
|
|
||
|
|
<h2 align="center">Usage (as a CLI utility)</h2>
|
||
|
|
|
||
|
|
You can analyze an existing bundle if you have a webpack stats JSON file.
|
||
|
|
|
||
|
|
You can generate it using `BundleAnalyzerPlugin` with `generateStatsFile` option set to `true` or with this simple
|
||
|
|
command:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
webpack --profile --json > stats.json
|
||
|
|
```
|
||
|
|
|
||
|
|
If you're on Windows and using PowerShell, you can generate the stats file with this command to [avoid BOM issues](https://github.com/webpack-contrib/webpack-bundle-analyzer/issues/47):
|
||
|
|
|
||
|
|
```
|
||
|
|
webpack --profile --json | Out-file 'stats.json' -Encoding OEM
|
||
|
|
```
|
||
|
|
|
||
|
|
Then you can run the CLI tool.
|
||
|
|
|
||
|
|
```
|
||
|
|
webpack-bundle-analyzer bundle/output/path/stats.json
|
||
|
|
```
|
||
|
|
|
||
|
|
<h2 align="center">Options (for CLI)</h2>
|
||
|
|
|
||
|
|
```bash
|
||
|
|
webpack-bundle-analyzer <bundleStatsFile> [bundleDir] [options]
|
||
|
|
```
|
||
|
|
|
||
|
|
Arguments are documented below:
|
||
|
|
|
||
|
|
### `bundleStatsFile`
|
||
|
|
|
||
|
|
Path to webpack stats JSON file
|
||
|
|
|
||
|
|
### `bundleDir`
|
||
|
|
|
||
|
|
Directory containing all generated bundles.
|
||
|
|
|
||
|
|
### `options`
|
||
|
|
|
||
|
|
```
|
||
|
|
-V, --version output the version number
|
||
|
|
-m, --mode <mode> Analyzer mode. Should be `server` or `static`.
|
||
|
|
In `server` mode analyzer will start HTTP server to show bundle report.
|
||
|
|
In `static` mode single HTML file with bundle report will be generated. (default: server)
|
||
|
|
-h, --host <host> Host that will be used in `server` mode to start HTTP server. (default: 127.0.0.1)
|
||
|
|
-p, --port <n> Port that will be used in `server` mode to start HTTP server. (default: 8888)
|
||
|
|
-r, --report <file> Path to bundle report file that will be generated in `static` mode. (default: report.html)
|
||
|
|
-s, --default-sizes <type> Module sizes to show in treemap by default.
|
||
|
|
Possible values: stat, parsed, gzip (default: parsed)
|
||
|
|
-O, --no-open Don't open report in default browser automatically.
|
||
|
|
-e, --exclude <regexp> Assets that should be excluded from the report.
|
||
|
|
Can be specified multiple times.
|
||
|
|
-l, --log-level <level> Log level.
|
||
|
|
Possible values: debug, info, warn, error, silent (default: info)
|
||
|
|
-h, --help output usage information
|
||
|
|
```
|
||
|
|
|
||
|
|
<h2 align="center" id="size-definitions">Size definitions</h2>
|
||
|
|
|
||
|
|
webpack-bundle-analyzer reports three values for sizes. `defaultSizes` can be used to control which of these is shown by default. The different reported sizes are:
|
||
|
|
|
||
|
|
### `stat`
|
||
|
|
|
||
|
|
This is the "input" size of your files, before any transformations like
|
||
|
|
minification.
|
||
|
|
|
||
|
|
It is called "stat size" because it's obtained from Webpack's
|
||
|
|
[stats object](https://webpack.js.org/configuration/stats/).
|
||
|
|
|
||
|
|
### `parsed`
|
||
|
|
|
||
|
|
This is the "output" size of your files. If you're using a Webpack plugin such
|
||
|
|
as Uglify, then this value will reflect the minified size of your code.
|
||
|
|
|
||
|
|
### `gzip`
|
||
|
|
|
||
|
|
This is the size of running the parsed bundles/modules through gzip compression.
|
||
|
|
|
||
|
|
<h2 align="center">Selecting Which Chunks to Display</h2>
|
||
|
|
|
||
|
|
When opened, the report displays all of the Webpack chunks for your project. It's possible to filter to a more specific list of chunks by using the sidebar or the chunk context menu.
|
||
|
|
|
||
|
|
### Sidebar
|
||
|
|
|
||
|
|
The Sidebar Menu can be opened by clicking the `>` button at the top left of the report. You can select or deselect chunks to display under the "Show chunks" heading there.
|
||
|
|
|
||
|
|
### Chunk Context Menu
|
||
|
|
|
||
|
|
The Chunk Context Menu can be opened by right-clicking or `Ctrl`-clicking on a specific chunk in the report. It provides the following options:
|
||
|
|
|
||
|
|
* **Hide chunk:** Hides the selected chunk
|
||
|
|
* **Hide all other chunks:** Hides all chunks besides the selected one
|
||
|
|
* **Show all chunks:** Un-hides any hidden chunks, returning the report to its initial, unfiltered view
|
||
|
|
|
||
|
|
<h2 align="center">Troubleshooting</h2>
|
||
|
|
|
||
|
|
### I don't see `gzip` or `parsed` sizes, it only shows `stat` size
|
||
|
|
|
||
|
|
It happens when `webpack-bundle-analyzer` analyzes files that don't actually exist in your file system, for example when you work with `webpack-dev-server` that keeps all the files in RAM. If you use `webpack-bundle-analyzer` as a plugin you won't get any errors, however if you run it via CLI you get the error message in terminal:
|
||
|
|
```
|
||
|
|
Couldn't parse bundle asset "your_bundle_name.bundle.js".
|
||
|
|
Analyzer will use module sizes from stats file.
|
||
|
|
```
|
||
|
|
To get more information about it you can read [issue #147](https://github.com/webpack-contrib/webpack-bundle-analyzer/issues/147).
|
||
|
|
|
||
|
|
|
||
|
|
<h2 align="center">Maintainers</h2>
|
||
|
|
|
||
|
|
<table>
|
||
|
|
<tbody>
|
||
|
|
<tr>
|
||
|
|
<td align="center">
|
||
|
|
<img width="150" height="150"
|
||
|
|
src="https://avatars3.githubusercontent.com/u/302213?v=4&s=150">
|
||
|
|
</br>
|
||
|
|
<a href="https://github.com/th0r">Yuriy Grunin</a>
|
||
|
|
</td>
|
||
|
|
<td align="center">
|
||
|
|
<img width="150" height="150"
|
||
|
|
src="https://avatars3.githubusercontent.com/u/482561?v=4&s=150">
|
||
|
|
</br>
|
||
|
|
<a href="https://github.com/valscion">Vesa Laakso</a>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
<tbody>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
|
||
|
|
[npm]: https://img.shields.io/npm/v/webpack-bundle-analyzer.svg
|
||
|
|
[npm-url]: https://npmjs.com/package/webpack-bundle-analyzer
|
||
|
|
|
||
|
|
[node]: https://img.shields.io/node/v/webpack-bundle-analyzer.svg
|
||
|
|
[node-url]: https://nodejs.org
|
||
|
|
|
||
|
|
[deps]: https://david-dm.org/webpack-contrib/webpack-bundle-analyzer.svg
|
||
|
|
[deps-url]: https://david-dm.org/webpack-contrib/webpack-bundle-analyzer
|
||
|
|
|
||
|
|
[tests]: http://img.shields.io/travis/webpack-contrib/webpack-bundle-analyzer.svg
|
||
|
|
[tests-url]: https://travis-ci.org/webpack-contrib/webpack-bundle-analyzer
|
||
|
|
|
||
|
|
[downloads]: https://img.shields.io/npm/dt/webpack-bundle-analyzer.svg
|
||
|
|
[downloads-url]: https://npmjs.com/package/webpack-bundle-analyzer
|
||
|
|
|
||
|
|
<h2 align="center">Contributing</h2>
|
||
|
|
|
||
|
|
Check out [CONTRIBUTING.md](./CONTRIBUTING.md) for instructions on contributing :tada:
|