when helper will inject to result code

[IronLu233]

I'm trying fixing #1924.

code with generator will call macro helper!(interop_require_default, "interopRequireDefault") in
https://github.com/IronLu233/swc/blob/104be9837b39bfd88a5ce4fcb47a7bd8915cc993/ecmascript/transforms/module/src/common_js.rs#L576

But _interopRequireDefault implements is not existed in the result.

When I import the other thing using import syntax, _interopRequireDefault is injected correctlly.

I try to excute enable_helper!(interop_require_default); before helper!(interop_require_default, "interopRequireDefault") , but it's not work.

So when helper will inject to result code, and when is not?

[kdy1]

Helper is injected by inject_helpers pass (https://rustdoc.swc.rs/swc_ecma_transforms_base/helpers/fn.inject_helpers.html) and it's chained like

swc/src/builder.rs

Line 199 in 7a8ad88

Optional::new(helpers::inject_helpers(), self.inject_helpers),