Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Array spread doesn't work correctly. #10586

rev-hikari opened this issue Oct 22, 2019 · 1 comment


Copy link

@rev-hikari rev-hikari commented Oct 22, 2019

Bug Report

Input Code


const arr1 = [...Array(2)]
const arr2 = Array(2);
const arr3 = [...arr2];

Current Behavior

var arr1 = _toConsumableArray(Array(2)); // [undefined, undefined]
var arr2 = Array(2); // [empty × 2]
var arr3 = [].concat(arr2); // [empty × 2]

Expected behavior/code

var arr1 = _toConsumableArray(Array(2)); // [undefined, undefined]
var arr2 = Array(2); // [empty × 2]
var arr3 = _toConsumableArray(arr2); // [undefined, undefined]

Babel Configuration (.babelrc, package.json, cli command)

  "presets": ["@babel/preset-env"]


  • Babel version(s): v7.6.4

This comment has been minimized.

Copy link

@babel-bot babel-bot commented Oct 22, 2019

Hey @rev-hikari! 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."

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
None yet
3 participants
You can’t perform that action at this time.