V3

__tests__/fixtures/js/dist/_filelist.json

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+{
+	"start":"start.f1ed5571f87447db4451.js"
+}

__tests__/fixtures/js/dist/start.f1ed5571f87447db4451.js

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+// js code here

__tests__/index.spec.js

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+test.skip('can run a test', () => {
+  expect(true).toBe(true)
+})

client/.babelrc

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+{
+    "presets": ["@babel/preset-env", "@babel/preset-react"],
+    "plugins": ["@babel/plugin-proposal-class-properties"]
+}

client/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# next.js build output
+.next
+
+# certs
+.csr
+.pem
+
+# CSS files are compiled
+public/styles.css
+public/styles.css*
+
+.DS_Store

client/FileListPlugin.js

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+class FileListPlugin {
+  apply(compiler) {
+    // emit is asynchronous hook, tapping into it using tapAsync, you can use tapPromise/tap(synchronous) as well
+    compiler.hooks.emit.tapAsync('FileListPlugin', (compilation, callback) => {
+      // Create a header string for the generated file:
+      let filelist = '{\n'
+
+      // Loop through all compiled assets,
+      // adding a new line item for each filename.
+      let i = 0
+      for (let filename in compilation.assets) {
+        let chunk = compilation.chunks[i]
+
+        if (chunk && chunk.name) {
+          filelist += `\t"${chunk.name}":"${filename}"` + ',\n'
+        }
+
+        i++
+      }
+
+      filelist = filelist.replace(/,\s*$/, '\n')
+      filelist += '}'
+
+      // Insert this list into the webpack build as a new file asset:
+      compilation.assets['_filelist.json'] = {
+        source: function() {
+          return filelist
+        },
+        size: function() {
+          return filelist.length
+        },
+      }
+
+      callback()
+    })
+  }
+}
+
+module.exports = FileListPlugin

client/README.md

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+```
+npm run build
+```
+or
+
+```
+yarn build
+```
+
+to bundle the application