SyntaxError: unknown: 'with' in strict mode

Bug Report

• I would like to work on a fix!

Current behavior

SyntaxError: unknown: ‘with’ in strict mode (1:27)

Input Code

const babel = require('@babel/core');

var code = 'function f(foo, values) {  with (foo) {   }  }'

var res = babel.transform(code, {
   retainLines: true,
   compact: false,
   presets: ['@babel/preset-env'],
   plugins: [
    ["@babel/plugin-transform-modules-commonjs", { "strictMode": false }]
  ]
}).code;

Expected behavior

The instrumentation should succeed.

Babel Configuration (babel.config.js, .babelrc, package.json#babel, cli command, .eslintrc)

• Filename: babel.config.js

None

Environment

None

• Babel version(s): 7.0.0
• Node/npm version: 15.2.0
• OS: [e.g. OSX 10.13.4, Windows 10]
• Monorepo: No
• How you are using Babel: I used the above code

Possible Solution

Additional context

[gogo9th]

I think you meant:

You could use sourceType: "unambiguous", which means "if there are import/export it’s sourceType: "module", otherwise it’s sourceType: "script". This does solve the problem perfectly. Thanks a lot!

[nicolo-ribaudo]

Well, if you are using import or export it’s going to crash, because they are only allowed in modules.

You could use sourceType: "unambiguous", which means "if there are import/export it’s sourceType: "unambiguous", otherwise it’s sourceType: "module".

I think that this will work in 99.9% of the cases (there are some differences between modules and scripts, but usually the problem is only when going from script to module).