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plugin-transform-modules-commonjs: export binding not updated by '' and 'for...of' #10941

ajafff opened this issue Dec 29, 2019 · 1 comment


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@ajafff ajafff commented Dec 29, 2019

Bug Report

  • I would like to work on a fix!

Current Behavior
If an exported binding is used as LHS in a ForOfStatement or ForInStatement, only the local variable is updated. The exported binding stays the same.

Input Code

export let foo = 'initial';

for (foo in {prop: 1}) {}

for (foo of ['element']) {}

for ({foo} of [{foo: 'destructured'}]) {}

Expected behavior/code should be updated every time foo is assigned a new value.
I tested the code without transpilation in Node.js and it works as expected.


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@babel-bot babel-bot commented Dec 29, 2019

Hey @ajafff! 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."

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