Add parameter oldVNode
when calling options._diff
#4849
+9
−9
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oldVnode
is not exposed inoptions._diff
, which makes it difficult to get the component instance in this hook (becausenewVNode
usually does not have a_component
property). This PR provides a new way to get the component instance in the update process, which can still work when, for example, parent and child componentssetState
at the same time.