fix event handlers (#298) #473

Job	Run time
list-examples	5s
check-export (ag_grid_finance)	1m 40s
check-export (azure_auth)	56s
check-export (basic_crud)	1m 8s
check-export (clock)	59s
check-export (counter)	1m 4s
check-export (customer_data_app)	56s
check-export (dalle)	1m 3s
check-export (data_visualisation)	1m 15s
check-export (flux-fast)	1m 1s
check-export (form-designer)	1m 17s
check-export (github-stats)	1m 5s
check-export (json-tree)	58s
check-export (linkinbio)	1m 1s
check-export (local-component)	1m 6s
check-export (lorem-stream)	1m 15s
check-export (nba)	1m 37s
check-export (nba-proxy)	1m 41s
check-export (overkey)	1m 0s
check-export (quiz)	1m 18s
check-export (reflexle)	1m 1s
check-export (sales)	1m 3s
check-export (snakegame)	1m 6s
check-export (todo)	1m 4s
check-export (translator)	1m 6s
check-export (traversal)	1m 0s
check-export (twitter)	57s
check-export (upload)	56s
	30m 38s

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