timse

                          Asset       Size  Chunks             Chunk Names
   main.cec87b856171489c2719.js  811 bytes       0  [emitted]  main
 vendor.73db375ed475c718163f.js    20.7 kB       1  [emitted]  vendor
runtime.93b41beba42ebff23af0.js    5.92 kB       2  [emitted]  runtime
   [0] ./~/preact/dist/preact.js 20.5 kB {1} [built]
   [1] ./src/bar.js 23 bytes {0} [built]
   [2] ./src/foo.js 118 bytes {0} [built]
   [3] multi preact 28 bytes {1} [built]

timse

// foo.js
import bar from './bar';
// ...

timse

                          Asset       Size  Chunks             Chunk Names
 vendor.634878b098e5c599febd.js    20.7 kB       0  [emitted]  vendor
   main.d59c6ff3126e3943c563.js  538 bytes       1  [emitted]  main
runtime.25ce0c546aab71f8eac5.js    5.92 kB       2  [emitted]  runtime
   [0] ./~/preact/dist/preact.js 20.5 kB {0} [built]
   [1] ./src/foo.js 93 bytes {1} [built]
   [2] multi preact 28 bytes {0} [built]

timse

// webpack.config.js 
// ... 
plugins: [ 
  // ... 
  new webpack.optimize.CommonsChunkPlugin({ 
    name: ['runtime'] 
  }) 
]

timse

// somewhere in the vendor.0da51f051fcf235d7027.js
// ...
chunkId + "." + {"0":"91022729b32987083f0d"}[chunkId]
// ...

timse

                         Asset       Size  Chunks             Chunk Names
  main.91022729b32987083f0d.js  506 bytes       0  [emitted]  main
vendor.0da51f051fcf235d7027.js    26.7 kB       1  [emitted]  vendor
   [0] ./~/preact/dist/preact.js 20.5 kB {1} [built]
   [1] ./src/foo.js 61 bytes {0} [built]
   [2] multi preact 28 bytes {1} [built]

timse

// foo.js
// ...
console.log(preact.toString());
console.log("hello world");

timse

                         Asset       Size  Chunks             Chunk Names
  main.edc22f71759cbe5336ae.js  528 bytes       0  [emitted]  main
vendor.27f1230219fd2a606a54.js    26.7 kB       1  [emitted]  vendor
   [0] ./~/preact/dist/preact.js 20.5 kB {1} [built]
   [1] ./src/foo.js 83 bytes {0} [built]
   [2] multi preact 28 bytes {1} [built]

timse

// webpack.config.js 
// ... 
output: { 
  path: path.join(__dirname, 'dist'), 
  filename: '[name].[chunkhash].js', 
}, 
// ...

timse

                         Asset       Size  Chunks             Chunk Names
  main.423221edd7eef26d646e.js  506 bytes       0  [emitted]  main
vendor.423221edd7eef26d646e.js    26.7 kB       1  [emitted]  vendor
   [0] ./~/preact/dist/preact.js 20.5 kB {1} [built]
   [1] ./src/foo.js 61 bytes {0} [built]
   [2] multi preact 28 bytes {1} [built]