Babel is not able to output the optional chaining operator without transpiling it

[craig-jennings]

Bug Report

Current behavior
Babel is not able to output the optional chaining operator without first transpiling it.

With a browserslist of: last 2 Chrome versions

ERROR in ./index.js 3:14
Module parse failed: Unexpected token (3:14)
File was processed with these loaders:
 * ./node_modules/babel-loader/lib/index.js
You may need an additional loader to handle the result of these loaders.
| (() => {
|   const x = 'abc';
>   const y = x?.length;
| })();

With a browserslist of: last 2 Chrome versions, IE 11, it succeeds. However the output (as expected) has the optional chaining operator transpiled to

  var x = 'abc';
  var y = x === null || x === void 0 ? void 0 : x.length;

Input Code

const x = 'abc';
const y = x?.length;

Expected behavior
Babel would succeed even when the browserslist only lists browsers that currently support the optional chaining operator.

Babel Configuration

• babel.config.js

module.exports = {
  presets: ['@babel/preset-env'],
};

• .browserslistrc

last 2 Chrome versions

• webpack.config.js

module.exports = {
  entry: './index.js',

  module: {
    rules: [
      {
        test: /\.js$/,
        use: 'babel-loader',
      },
    ],
  },
};

• index.js

(() => {
  const x = 'abc';
  const y = x?.length;
})();

Environment

• Babel version: v7.11.6
• Node/Yarn version: Node 12.18.4/Yarn 1.22.4
• OS: Windows 10
• Monorepo: No
• How you are using Babel: loader

Possible Solution

Additional context
Add any other context about the problem here. Or a screenshot if applicable

[babel-bot]

Hey @craigjennings11! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite."

[craig-jennings]

I just made the connection that this is probably a webpack issue. Turns out that's the issue.

[JLHwung]

Duplicate of babel/babel-loader#871