Rollup class fields error: 'super' keyword outside a method

[pschroen]

• Rollup Version: 2.6.1
• Operating System: macOS Mojave
• Node Version: 13.7.0
• Link to reproduction: https://rollupjs.org/repl/?version=2.6.1&shareable=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

Expected Behavior

The super keyword is valid in class fields. For reference:
https://2ality.com/2019/07/public-class-fields.html#the-scope-of-field-initializers

Actual Behavior

Error: 'super' keyword outside a method

[lukastaegert]

This is an issue in the underlying acorn plugin, I filed an issue upstream: acornjs/acorn-class-fields#9. Not sure when it will be resolved, though, as development is somewhat stalled there 😢

[ChocolateLoverRaj]

It still gives the same error. I don't think this issue was fixed.

[lukastaegert]

Well, it works in the reproduction now: https://rollupjs.org/repl/?version=2.23.0&shareable=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

If it is still broken for you, please post a new one.

[ChocolateLoverRaj]

Ok, i realised that my error is slightly different than the error on the issue. It still gives the error message, 'super' keyword outside a method. My error is with static properties using the 'super' keyword. I will start a separate issue.

[pschroen]

Referencing the new issue (#3702), should have caught this before...

[lukastaegert]

In their defense, this time the issue is likely in another plugin, namely acorn-static-class-features vs.acorn-class-fields