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Use of miniKindOf is not ES5-compliant

See original GitHub issue

Prior Issues

None that I could find.

What is the current behavior?

Redux causes my application to crash on some ES5 browsers because of a nested function within an if statement in kindOf.ts. This is not permitted in ES5 and Babel does not seem to provide a transform for this, probably because it would break existing code.

The exact console log is this: SyntaxError: Nested functions cannot be declared in strict mode.

Steps to Reproduce

It’s a bit hard to create a live repro case for this, since finding an ES5 browser is difficult nowadays. However, I can provide a gist with my Babel and browserslist configurations as well as a file highlighting the issue.

What is the expected behavior?

Redux should run in an ES5 environment with a standard Babel configuration.

Environment Details

Browser: Midori 0.5.11 on Ubuntu 18.04

Issue Analytics

State:
Created 2 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

2reactions

timdorrcommented, Aug 3, 2021

Fixed in https://github.com/reduxjs/redux/releases/tag/v4.1.1

1reaction

markeriksoncommented, May 22, 2021

Yeah, definitely a pretty rare edge case 😃

tbh this is low priority for me atm, as we’re focusing on getting the RTK Query APIs out the door. If you’d like to submit a PR that rearranges the code to make this work as expected, we can look at getting that in.

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