webpack-core

0.6.9 verified Sat Apr 25 auth: no javascript deprecated

The shared core of webpack and enhanced-require, encapsulating loader mechanics and SourceMap handling. Version 0.6.9 is the latest (no longer maintained; last release 2014). It is not intended as a standalone module but provides infrastructure for custom loaders and plugins. Webpack 1.x used this; later versions replaced it with webpack-sources and internal refactoring. Key differentiator: it was the foundational runtime for webpack's loader pipeline before being absorbed into webpack proper. Requires Node >=0.6.

Common errors

error Cannot find module 'webpack-core' ↓

cause Package not installed; webpack-core is internal and not published separately.

fix

Install webpack (includes webpack-core internally).

error Module not found: Error: Cannot resolve module 'webpack-core/lib/SourceMapSource' ↓

cause Incorrect import path.

fix

Use: const SourceMapSource = require('webpack-core').SourceMapSource;

Warnings

deprecated webpack-core is no longer maintained. Use webpack >= 2.0 which includes its own core. ↓

fix Upgrade to webpack 2 or later.

gotcha Not a standalone module; requires webpack context. ↓

fix Do not import directly; use webpack's public API.

Install

npm install webpack-core

yarn add webpack-core

pnpm add webpack-core

Imports

SourceMapSource
wrong
```
const SourceMapSource = require('webpack-core').SourceMapSource;
```
correct
```
import { SourceMapSource } from 'webpack-core'
```
CommonJS requires the full path: const SourceMapSource = require('webpack-core/lib/SourceMapSource');

RawSource

wrong

const RawSource = require('webpack-core');

correct

import { RawSource } from 'webpack-core'

Use named import; default export does not exist.

ModuleFilenameHelpers
wrong
```
import ModuleFilenameHelpers from 'webpack-core';
```
correct
```
import { ModuleFilenameHelpers } from 'webpack-core'
```
CommonJS: const ModuleFilenameHelpers = require('webpack-core/lib/ModuleFilenameHelpers');

Quickstart

Shows basic webpack usage (webpack-core is not used standalone).

const webpack = require('webpack');
const config = {
  entry: './src/index.js',
  output: { path: './dist', filename: 'bundle.js' },
  module: { loaders: [{ test: /\.js$/, loader: 'babel' }] },
  plugins: []
};
webpack(config, (err, stats) => {
  if (err) console.error(err);
  else console.log(stats.toString());
});