JSON Module Scripts

[dandclark]

Description

JSON modules (with import attributes) are a way to import JSON in JavaScript.

Note: Per discussion of the interop team this proposal is split off from #436 to be considered independently of CSS module scripts in proposal selection.
cc @o-t-w.

Specification

https://github.com/tc39/proposal-import-attributes
https://github.com/tc39/proposal-json-modules

Open Issues

whatwg/html#7233
There is an open PR that would close this issue.

Tests

https://wpt.fyi/results/html/semantics/scripting-1/the-script-element?label=master&label=experimental&aligned&q=%28import-attributes%20or%20json%29%20and%20not%20assertions

Current Implementations

• Blink
• Gecko
• WebKit

Standards Positions

Safari Technology Preview supports import attributes and JSON modules.

Chrome Canary is currently updating the import attribute syntax from import assertions.

Browser bug reports

Gecko bug for import attributes.

Developer discussions

This Tweet has almost 900 likes https://x.com/mattpocockuk/status/1694679999117246640?s=20

Polls & Surveys

No response

Existing Usage

No response

Workarounds

No response

Accessibility Impact

No impact.

Privacy Impact

No impact.

Other

No response

[jensimmons]

JSON module assertions is not standard, and should not be included in this proposal.

Seems their tests will be marked optional. They should not be included in Interop 2024.
web-platform-tests/wpt#42875

[dandclark]

Looks to me like the test link https://wpt.fyi/results/html/semantics/scripting-1/the-script-element?label=master&label=experimental&aligned&q=%28import-attributes%20or%20json%29%20and%20not%20assertions in the proposal is already excluding those and including only the versions with the new with keyword, but we should double-check after the changes proposed in web-platform-tests/wpt#42875 land to make sure the right set of tests is still included.

[gsnedders]

FYI:

% rg 'assert[^_]' html/semantics/scripting-1/the-script-element/import-attributes html/semantics/scripting-1/the-script-element/json-module
html/semantics/scripting-1/the-script-element/import-attributes/dynamic-import-with-attributes-argument.any.js
16:        import("./export-hello.js", { assert: { type: "notARealType"} } ),

(There's other matches that aren't relevant.)