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fix(core): SSR error in signal forms

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Resolves an SSR error, because we weren't checking if `MutationObserver` is available.

(cherry picked from commit 3f80ae74ba)
This commit is contained in:
Kristiyan Kostadinov 2025-11-13 11:32:10 +01:00 committed by Jessica Janiuk
parent 0c27954a4d
commit 67fbd5ff1e
1 changed files with 10 additions and 2 deletions
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12
packages/core/src/render3/instructions/control.ts
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@ -352,8 +352,16 @@ function listenToNativeControl(lView: LView<{} | null>, tNode: TNode, control:
// This means that we need to know when an `<option>` is created, destroyed, or has its `value`
// changed so that we can re-sync the `<select>` to the field state's value. We implement this
// using a `MutationObserver` that we create to observe `<option>` changes.
if (element instanceof HTMLSelectElement) {
const observer = observeSelectMutations(element, getControlDirective(tNode, lView)!);
if (
tNode.type === TNodeType.Element &&
tNode.value === 'select' &&
typeof MutationObserver === 'function'
) {
const observer = observeSelectMutations(
element as HTMLSelectElement,
getControlDirective(tNode, lView)!,
);
storeCleanupWithContext(tView, lView, observer, observer.disconnect);
}
}