Called when the element is adopted to a document.
Called when one of the element's
name of the observed attribute
previous value of the attribute. null if it was nonexistent
current value of the attribute. null if removed.
Lifecycle callback that reacts to changes in the GraphQL document
Get a GraphQL DocumentNode from the element's GraphQL script child
Gets operation variables from the element's JSON script child
Lifecycle callback that reacts to changes in the operation variables