This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The FocusEvent interface represents focus-related events like focus, blur, focusin, or focusout.
FocusEvent()FocusEvent event with the given parameters.Inherits properties from its parent UIEvent, and indirectly from Event.
FocusEvent.relatedTarget Read only
EventTarget representing a secondary target for this event. As in some cases (like when tabbing in or out a page), this property may be set to null for security reasons.No specific method; inherits methods from its parent UIEvent, and indirectly from Event.
| Specification | Status | Comment |
|---|---|---|
| Document Object Model (DOM) Level 3 Events Specification The definition of 'FocusEvent' in that specification. | Obsolete | Initial definition. |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 24.0 (24.0) | 9.0 | (Yes) | (Yes) |
| Constructor | (Yes) | (Yes) | 24.0 (24.0) | No support | (Yes) | (Yes) |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 24.0 (24.0) | (Yes) | (Yes) | (Yes) |
| Constructor | (Yes) | (Yes) | 24.0 (24.0) | No support | (Yes) | (Yes) |
Event base interface.
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https://developer.mozilla.org/en-US/docs/Web/API/FocusEvent