A handler expression is emitted as text and evaluated when the event fires, so
any loop variable it names has to travel with the element. Components emitted
`data-wrn-loop-locals` for this; pages did not. The same view worked inside a
component and threw ReferenceError inside a page -- with a green build and green
tests, since nothing renders the page in a browser during a build.
The CSR runtime already resolves locals generically via
closest("[data-wrn-loop-locals]"), so only codegen needed to change.
The marker is emitted only on elements that actually bind an event, and the
encoder only when a marker was produced -- but it MUST be emitted whenever one
is, or the render throws on an undefined function instead of the handler
throwing on an undefined variable, which is strictly worse. Covered by its own
test.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ClintchizandClaude Opus 5
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