Error when Uglifying with Webpack 4

Superagent Version: 4.0.0-beta.5 Webpack Version: 4.19.1 UglifyJS Webpack Plugin: 2.0.1

Appears to have an issue when running a production build in Webpack 4 with UglifyJS.

ERROR in bundle.js from UglifyJs Unexpected token: name (root) [./node_modules/superagent/lib/client.js:5,0]...

Possibly an issue with using the reserved keyword ‘root’.

[TotooriaHyperion]

No, you are wrong it’s not a problem of Uglify plugin.

It’s because many people use webpack this way:

      {
        test: /\.tsx?$/,
        loader: "ts-loader",
        exclude: /node_modules/,
        options: {
          configFile: path.resolve(__dirname, "../../src/tsconfig.json"),
        },
      },

so the const/let etc… will not be transpiled to es5.

add a rule:

      {
        test: /\.jsx?$/,
        loader: "ts-loader",
        include: /(autobind-decorator)|(superagent)/,
        options: {
          configFile: path.resolve(__dirname, "../../src/tsconfig.json"),
          transpileOnly: true,
        },
      },

will fix this problem.

Situation1: People usually use webpack to bundle with loaders exclude file in node_modules Situation2: Some package don’t provide es5 version, or use module: es6version in package.json

Situation1 + Situation2 = the code send to uglify plugin would be es6 version, causing this problem.

[sergej-s]

@djizco Hi! How did you solve the issue? What do you mean of switching to ES5 version?