feat: resolve nested :key bindings inside object and array props

[maximepvrt]

Bindings inside YAML props blocks or inline JSON props (e.g. links: [{ :to: data.url }]) were passed through verbatim because resolveAttributes only handled top-level : attributes. Resolve them recursively with the same rules (JSON literal, then dot-path) and apply the unsafe-URL hard floor to nested href/src bindings too.

Closes #286

Summary by CodeRabbit

• New Features
  • Bindings can now resolve within nested objects and arrays in YAML and inline JSON props, including values nested multiple levels deep.
  • Nested bindings also resolve within JSON string values. In preserve mode, unresolved binding keys remain unchanged.
  • Nested URL bindings that resolve to unsafe destinations are omitted, while other nested values remain available.
• Documentation
  • Added examples and clarified how nested bindings and literal values are handled.

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🟢 +0 new · 🟠 ~1 changed · 🔴 -0 removed · 1 flow · 2 files · commit a55b461

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Resolving nested prop bindings

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📝 Walkthrough

Walkthrough

Nested :-prefixed bindings in object and array props now resolve at any depth in YAML props and inline JSON. The resolver removes nested bindings that resolve to unsafe URLs. Tests cover nested resolution, preserve mode, and source attribute immutability.

Changes

Nested prop binding resolution

Layer / File(s)	Summary
Document and implement nested binding resolution docs/content/2.syntax/2.components.md, packages/comark/src/internal/stringify/attributes.ts, packages/comark/test/resolve-attributes.test.ts, test/bundle.test.ts	The documentation describes nested binding syntax. The resolver recursively processes nested values and removes unsafe URL bindings. Tests cover nested resolution, preserve mode, input immutability, and unsafe URLs. The published bundle size snapshot is updated.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to 882ba

Nested bindings resolve in YAML and JSON props, while unsafe nested URLs are omitted. The supplied change evidence identifies no remaining concrete merge risk; normal checks can proceed.

Architecture Summary

Architecture risk: 🔵 Low · up to 882ba

The change affects 3 systems.

Changed systems: packages/comark, docs, test

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — packages/comark (library) was modified; 2 changed files map to changed impact.
• observed — docs (service) was modified; 1 changed file maps to changed impact.
• observed — test (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in docs/content/2.syntax/2.components.md: Added a new "Nested props" section documenting that :-prefixed keys inside object/array props (from YAML props blocks or inline JSON) are data-bound, with examples using data.platform.dashboard_login_url, and stating both forms resolve to an array of { label, to } objects.
• observed — Modified behavior in docs/content/2.syntax/2.components.md: The resolution rules now state that only :-prefixed props participate in data binding at any depth, and that plain prop="value" attributes and un-prefixed nested keys are always passed as literal values instead of the prior "always passed as literal strings" wording.
• observed — Modified behavior in packages/comark/src/internal/stringify/attributes.ts: Added doc comments stating that :prefixed keys nested inside object/array values (YAML block props, JSON props) are resolved the same way, at any depth.
• observed — Modified behavior in packages/comark/src/internal/stringify/attributes.ts: In the parseJson && isBinding branch, a string value that JSON-parses now flows through resolveNestedBindings(JSON.parse(value), renderData, options) instead of assigning the parsed value directly (falling back to dot-path lookup on parse failure), and non-string binding values are recursively resolved instead of passed through verbatim.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: recursive resolution of nested :key bindings in object and array props.
Linked Issues check	✅ Passed	Issue #286 requires bindings in YAML component props and inline JSON props. resolveNestedBindings now traverses nested objects and arrays at any depth. It applies JSON-literal parsing in parseJson…
Out of Scope Changes check	✅ Passed	The source change, documentation, tests, and bundle-size snapshot support nested prop binding for issue #286. The nested unsafe-URL check protects the new binding path. No unrelated functional change …

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commit: 882ba51

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Actionable comments posted: 1

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Inline comments:
In `@packages/comark/src/internal/stringify/attributes.ts`:
- Around line 153-158: Update the parseJson handling in the string-binding logic
and its nested item branch to pass successfully parsed JSON through
resolveNestedBindings with renderData and options before assigning outValue,
preserving the existing fallback behavior for parse failures.

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📒 Files selected for processing (3)

• docs/content/2.syntax/2.components.md
• packages/comark/src/internal/stringify/attributes.ts
• packages/comark/test/resolve-attributes.test.ts

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