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Add support for arbitrary module namespace identifiers #4770

merged 2 commits into from Dec 28, 2022


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This PR contains:

  • bugfix
  • feature
  • refactor
  • documentation
  • other

Are tests included?

  • yes (bugfixes and features will not be merged without tests)
  • no

Breaking Changes?

  • yes (breaking changes will not be merged unless absolutely necessary)
  • no

List any relevant issue numbers:


This adds support for ES2022 arbitrary module namespace identifiers, i.e.

import { '=>' as foo } from './foo.js';
export { foo as '=>' };
export { '=>' as '<=' } from './foo.js';

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github-actions bot commented Dec 27, 2022

Thank you for your contribution! ❤️

You can try out this pull request locally by installing Rollup via

npm install rollup/rollup#gh-4322-arbitrary-module-namespace-identifiers

or load it into the REPL:

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codecov bot commented Dec 27, 2022

Codecov Report

Merging #4770 (b9566a0) into master (57fa7e0) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4770      +/-   ##
- Coverage   99.03%   99.03%   -0.01%     
  Files         217      217              
  Lines        7774     7773       -1     
  Branches     2154     2159       +5     
- Hits         7699     7698       -1     
  Misses         24       24              
  Partials       51       51              
Impacted Files Coverage Δ
src/Module.ts 100.00% <100.00%> (ø)
src/ast/nodes/NodeType.ts 100.00% <0.00%> (ø)

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@lukastaegert lukastaegert merged commit 5aa1cce into master Dec 28, 2022
9 of 10 checks passed
@lukastaegert lukastaegert deleted the gh-4322-arbitrary-module-namespace-identifiers branch December 28, 2022 05:57
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This PR has been released as part of rollup@3.9.0. You can test it via npm install rollup.

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Successfully merging this pull request may close these issues.

ES2022: arbitrary module namespace names
2 participants