The focus events don't have consistent casing in their names with respect to other event attribtes:
|
// Focus Events |
|
onFocus?: FocusEventHandler<Target> | undefined; |
|
onFocusCapture?: FocusEventHandler<Target> | undefined; |
|
onfocusin?: FocusEventHandler<Target> | undefined; |
|
onfocusinCapture?: FocusEventHandler<Target> | undefined; |
|
onfocusout?: FocusEventHandler<Target> | undefined; |
|
onfocusoutCapture?: FocusEventHandler<Target> | undefined; |
|
onBlur?: FocusEventHandler<Target> | undefined; |
|
onBlurCapture?: FocusEventHandler<Target> | undefined; |
The four in question should probably be onFocusIn, onFocusInCapture, onFocusOut, and onFocusOutCapture.