d82adbe8c4
Two issues with DebugNode/DebugElement in Ivy were causing problems in user tests. 1. The DebugNodes returned by Ivy were not actually instances of DebugNode. This was due to an issue with the Ivy switch logic in debug_node.ts. The declaration of the exported DebugNode reference was set to `DebugNode__PRE_R3__ as any`. The cast prevented the Ivy switch transform from detecting this as a switchable declaration. The transform cannot handle arbitrary syntax, and exports *must* be of the form "const x = y__PRE_R3__;" or they will not work. The cast to any in this case was not needed, so this commit removes it. 2. DebugNodes returned by Ivy multiple times for the same element were not reference-identical. This was previously considered a minor breaking change in Ivy, but testing has shown that users depend on referential equality of DebugNodes. This commit caches a DebugNode on a DOM node when first creating it, to allow returning the same instance in subsequent operations. PR Close #30756
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