webpacker:compile doesnt seem to be loading babelrc

[roine]

Im trying to get my js to compile to valid JS for IE10. Also the debug mode doesnt seem to run in prod compile mode, everything is fine in webpack-dev-server. Here's my config:

  "presets": [
    ["env", {
      "modules": false,
      "targets": {
        "browsers": ["IE 10",
          "> 1%",
          "last 2 versions"
        ],
      },
      "useBuiltIns": true,
      "debug": true,
    }]
  ],

  "plugins": [
    "syntax-dynamic-import",
    "transform-object-rest-spread",
    ["transform-class-properties", { "spec": true }]
  ]
}

Here is where it breaks r=n[i]={i,, IE10 doesnt support this syntax.

Following screenshots are from the same page

Dev mode

After compile, running in Prod mode

How do I get my prod build to work for IE10?

[roine]

Solved with:

const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
environment.plugins.delete('UglifyJs');
environment.plugins.set('UglifyJs', new UglifyJSPlugin({
  uglifyOptions:{
    ecma:5
  }
}));

[dipakchandranp]

@roine Where did you add this code?