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feat: Migrate to Webpack Built-in Infrastructure Logger with Backward… #738

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ad3efed
feat: Migrate to Webpack Built-in Infrastructure Logger with Backward…
ronakmaheshwari Sep 10, 2026
8429330
refactor: simplify infrastructure logger adapter with Proxy and impro…
ronakmaheshwari Sep 12, 2026
242e5dd
feat:Cover server analyzer mode
ronakmaheshwari Sep 12, 2026
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5 changes: 5 additions & 0 deletions .changeset/use-webpack-infrastructure-logger.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"webpack-bundle-analyzer": minor
---

Use Webpack's infrastructure logger when available (`compiler.getInfrastructureLogger('webpack-bundle-analyzer')`) and deprecate the plugin's `logLevel` option in favor of Webpack's native `infrastructureLogging` configuration.
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -68,7 +68,7 @@ new BundleAnalyzerPlugin(options?: object)
| **`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. |
| **`logLevel`** | One of: `info`, `warn`, `error`, `silent` | **Deprecated**. Default: `info`. Used to control how much details the plugin outputs. Please use webpack's [`infrastructureLogging`](https://webpack.js.org/configuration/infrastructureLogging/) configuration instead. |

### Absolute output paths

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20 changes: 19 additions & 1 deletion src/BundleAnalyzerPlugin.js
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Expand Up @@ -16,6 +16,7 @@ const viewer = require("./viewer");
/** @typedef {import("webpack").StatsCompilation} StatsCompilation */
/** @typedef {import("./sizeUtils").Algorithm} CompressionAlgorithm */
/** @typedef {import("./Logger").Level} LogLever */
/** @typedef {ReturnType<import("webpack").Compiler["getInfrastructureLogger"]>} WebpackLogger */
/** @typedef {import("./viewer").ViewerServerObj} ViewerServerObj */

/** @typedef {string | boolean | StatsOptions} PluginStatsOptions */
Expand Down Expand Up @@ -70,7 +71,7 @@ const analyzerStatsOptions = {
* @property {string=} statsFilename stats filename
* @property {PluginStatsOptions=} statsOptions stats options
* @property {ExcludeAssets=} excludeAssets exclude assets
* @property {LogLever=} logLevel exclude assets
* @property {LogLever=} logLevel (deprecated) log level
* @property {boolean=} startAnalyzer start analyzer
* @property {AnalyzerUrl=} analyzerUrl start analyzer
*/
Expand All @@ -80,6 +81,8 @@ class BundleAnalyzerPlugin {
* @param {Options=} opts options
*/
constructor(opts = {}) {
const hasCustomLogLevel = typeof opts.logLevel !== "undefined";

/** @type {Required<Omit<Options, "analyzerPort" | "statsOptions">> & { analyzerPort: number, statsOptions: undefined | PluginStatsOptions }} */
this.opts = {
analyzerMode: "server",
Expand All @@ -102,10 +105,13 @@ class BundleAnalyzerPlugin {
opts.analyzerPort === "auto" ? 0 : (opts.analyzerPort ?? 8888),
};

/** @type {boolean} */
this.hasCustomLogLevel = hasCustomLogLevel;
/** @type {Compiler | null} */
this.compiler = null;
/** @type {Promise<ViewerServerObj> | null} */
this.server = null;
/** @type {Logger | WebpackLogger} */
this.logger = new Logger(this.opts.logLevel);
}

Expand All @@ -115,6 +121,18 @@ class BundleAnalyzerPlugin {
apply(compiler) {
this.compiler = compiler;

if (compiler.getInfrastructureLogger) {
const infraLogger = compiler.getInfrastructureLogger(
"webpack-bundle-analyzer",
);
this.logger = Logger.createInfrastructureLoggerAdapter(
infraLogger,
this.hasCustomLogLevel ? this.opts.logLevel : undefined,
);
} else {
this.logger = new Logger(this.opts.logLevel);
}

/**
* @param {Stats} stats stats
* @param {(err?: Error) => void} callback callback
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