feat(es/ast): Support import attributes proposal

[kdy1]

Description:

Related issue:

• Closes import '...' with {...} #7179

[kdy1]

swc-bump:

• swc_ecma_ast --breaking

[swc-bot]

Automated review comment generated by auto-rebase script

[chentsulin]

Hi @kdy1, I use @swc/core 1.3.82 with ts-node and have some problems due to this feature.

This feature transforms the assert keyword to the with keyword, like below:

import data from "./data.json" assert { type: "json" };

https://github.com/kdy1/swc/blob/c6a477d528a5e844680f85606a2f146d9a41f8d0/crates/swc_ecma_codegen/tests/fixture/issues/3110/input.js

import data from "./data.json" with {
    type: "json"
};

https://github.com/kdy1/swc/blob/c6a477d528a5e844680f85606a2f146d9a41f8d0/crates/swc_ecma_codegen/tests/fixture/issues/3110/output.js

However, there are a lot of environments (including our node 18/20) only support import assertions and not import attributes. So it causes a SyntaxError:

SyntaxError: Unexpected token 'with'
           at CustomizedModuleLoader.moduleStrategy (node:internal/modules/esm/translators:116:18)
           at CustomizedModuleLoader.moduleProvider (node:internal/modules/esm/loader:190:14)
           at async link (node:internal/modules/esm/module_job:67:21)

Is it as expected?

[kdy1]

I didn't expect it

[chentsulin]

There is a babel plugin supporting transform from with to assert: https://babeljs.io/docs/babel-plugin-proposal-import-attributes-to-assertions

However, in my case, avoiding transform from assert to with is enough.

[nicolo-ribaudo]

The status currently is that:

• V8 supports with behind a --harmony-import-attributes flag (so does Chrome dev, Deno when it will upgrade swc, and Node.js when it will upgrade V8), and it supports assert
• JSC only supports with, but I do not think it's in safari TP yet
• SpiderMonkey is implementing with

Our goal is to only have babeljs.io/docs/babel-plugin-proposal-import-attributes-to-assertions as a temporary plugin, and deprecate it as soon as it's feasible to do so.