chore(live-preview): strongly types message events #10148
Merged
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Live Preview message events were typed with the generic
MessageEvent
interface without passing any of the Live Preview specific properties, leading to unknown types upon use. To fix this, there is a newLivePreviewMessageEvent
which properly extends the underlyingMessageEvent
interface, providing much needed type safety to these functions. In the same vein, theUpdatedDocument
type was not being properly shared across packages, leading to multiple independent definitions of this type. This type is now exported frompayload
itself and renamed toDocumentEvent
for improved semantics. Same with theFieldSchemaJSON
type. This PR also adjusts where globally scoped variables are set, putting them within the shared_payloadLivePreview
namespace instead of setting them individually at the top-level.