fix: acknowledge self-closing flag on foreign integration points - #2492
fix: acknowledge self-closing flag on foreign integration points#2492maximilliangrand wants to merge 2 commits into
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In HTML mode the self-closing flag is honored for foreign (SVG/MathML)
elements, e.g. `<svg><rect/>x</svg>` closes `rect` and keeps `x` as a
sibling. Integration points such as `<foreignObject>`, `<title>` inside
`<svg>`, or `<mi>` inside `<math>` are themselves foreign elements, but
opening them pushes an HTML child context, so `isInForeignContext()`
returned false and `onselfclosingtag` ignored the slash, nesting the
following content inside the element:
parseDocument("<svg><foreignObject/>x</svg>")
// before: foreignObject contains "x" (wrong)
// after: foreignObject is empty, "x" is a sibling (matches parse5)
Decide the acknowledgement from whether the current element is itself
foreign (checking the enclosing context for integration points) rather
than from the child context it establishes.
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Included review availability: Your plan includes up to 8 reviews per rolling hour; 7 remain after this review. 📝 WalkthroughWalkthroughThe parser now distinguishes the current foreign element from the broader foreign context when handling self-closing tags. Tests cover SVG, MathML, integration points, and HTML descendants inside ChangesForeign self-closing tag handling
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to This localized parser fix changes self-closing handling for foreign HTML integration points and adds regression coverage; no actionable merge-blocking risk remains beyond normal checks and review. Poem
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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| Filename | Overview |
|---|---|
| src/Parser.ts | Adds an enclosing-context-aware foreign-element check and applies it to self-closing-tag handling. |
| src/Parser.events.spec.ts | Adds positive integration-point cases and a negative HTML-descendant regression case. |
| src/snapshots/Parser.events.spec.ts.snap | Records the expected event sequences for the new self-closing parsing cases. |
Flowchart
%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[Self-closing tag encountered] --> B{recognizeSelfClosing enabled?}
B -->|Yes| E[Close current tag]
B -->|No| C{Current tag is foreign?}
C -->|Current foreign context| E
C -->|Integration point with foreign enclosing context| E
C -->|No| D[Ignore self-closing flag]
Reviews (2): Last reviewed commit: "test: cover SVG desc, MathML annotation-..." | Re-trigger Greptile
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Actionable comments posted: 1
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Inline comments:
In `@src/Parser.events.spec.ts`:
- Around line 218-226: Extend the self-closing integration-point tests around
the existing cases to cover SVG desc and MathML annotation-xml, and add a
negative nested case showing that an HTML descendant such as title inside
foreignObject still ignores the slash. Keep the existing runTest-based style and
assertions.
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Configuration used: Organization UI
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src/Parser.events.spec.tssrc/Parser.ts
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1 issue found across 3 files
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<file name="src/Parser.ts">
<violation number="1" location="src/Parser.ts:356">
P3: The `foreignContext[1]` index is a magic number that depends on an implicit invariant: every integration element in HTML mode pushes `ForeignContext.None` onto the stack in `emitOpenTag`, so after the current tag is opened index 1 is always the *enclosing* context. This coupling is easy to miss, and if a future change stops pushing a `None` entry for an integration element, `foreignContext[1]` becomes `undefined`, and `undefined !== ForeignContext.None` is `true`, silently misclassifying the tag as foreign (self-closing slash honored for a document-level `<title/>`, `<mi/>`, etc.). Make the intent explicit and robust by checking the enclosing entry via length, e.g. `this.foreignContext.length > 1 && this.foreignContext[1] !== ForeignContext.None`, and add the invariant to the doc comment.</violation>
</file>
Reply with feedback, questions, or to request a fix.
Fix all with cubic | Re-trigger cubic
| this.isInForeignContext() || | ||
| (this.htmlMode && | ||
| htmlIntegrationElements.has(this.tagname) && | ||
| this.foreignContext[1] !== ForeignContext.None) |
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P3: The foreignContext[1] index is a magic number that depends on an implicit invariant: every integration element in HTML mode pushes ForeignContext.None onto the stack in emitOpenTag, so after the current tag is opened index 1 is always the enclosing context. This coupling is easy to miss, and if a future change stops pushing a None entry for an integration element, foreignContext[1] becomes undefined, and undefined !== ForeignContext.None is true, silently misclassifying the tag as foreign (self-closing slash honored for a document-level <title/>, <mi/>, etc.). Make the intent explicit and robust by checking the enclosing entry via length, e.g. this.foreignContext.length > 1 && this.foreignContext[1] !== ForeignContext.None, and add the invariant to the doc comment.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At src/Parser.ts, line 356:
<comment>The `foreignContext[1]` index is a magic number that depends on an implicit invariant: every integration element in HTML mode pushes `ForeignContext.None` onto the stack in `emitOpenTag`, so after the current tag is opened index 1 is always the *enclosing* context. This coupling is easy to miss, and if a future change stops pushing a `None` entry for an integration element, `foreignContext[1]` becomes `undefined`, and `undefined !== ForeignContext.None` is `true`, silently misclassifying the tag as foreign (self-closing slash honored for a document-level `<title/>`, `<mi/>`, etc.). Make the intent explicit and robust by checking the enclosing entry via length, e.g. `this.foreignContext.length > 1 && this.foreignContext[1] !== ForeignContext.None`, and add the invariant to the doc comment.</comment>
<file context>
@@ -338,6 +338,25 @@ export class Parser implements Callbacks {
+ this.isInForeignContext() ||
+ (this.htmlMode &&
+ htmlIntegrationElements.has(this.tagname) &&
+ this.foreignContext[1] !== ForeignContext.None)
+ );
+ }
</file context>
| this.foreignContext[1] !== ForeignContext.None) | |
| this.foreignContext.length > 1 && | |
| this.foreignContext[1] !== ForeignContext.None) |
|
Good call — added coverage in 36736f5 for the two integration points I'd claimed but not tested, plus the negative case:
On the |
1 participant
Problem
In HTML mode the self-closing flag is honored for foreign (SVG/MathML) elements —
<svg><rect/>x</svg>closesrectand keepsxas a sibling. But HTML integration points (<foreignObject>,<title>/<desc>inside<svg>,<mi>/<annotation-xml>inside<math>) are themselves foreign elements while parsing their children as HTML. Opening one pushes an HTML child context, soisInForeignContext()returnsfalseandonselfclosingtagignores the slash, nesting the following content inside the element:Same for
<svg><title/>,<svg><desc/>,<math><mi/>,<math><annotation-xml/>, etc.Cause
onselfclosingtagdecided acknowledgement from the child context the element establishes instead of from whether the element itself is foreign.Fix
Add
currentTagIsForeign(), which also treats an integration point whose enclosing context is foreign as foreign.<svg><rect/>x</svg>,<svg/>x, and plain-HTML<title/>are unchanged.Tests + snapshots added;
npm test(190 tests) and lint pass.Summary by CodeRabbit
foreignObject.