FocusEvent.relatedTarget - Web APIs 编辑
The FocusEvent.relatedTarget read-only property is the secondary target, depending on the type of event:
| Event name | target | relatedTarget |
|---|---|---|
blur | The EventTarget losing focus | The EventTarget receiving focus (if any). |
focus | The EventTarget receiving focus | The EventTarget losing focus (if any) |
focusin | The EventTarget receiving focus | The EventTarget losing focus (if any) |
focusout | The EventTarget losing focus | The EventTarget receiving focus (if any) |
Note that many elements can't have focus, which is a common reason for relatedTarget to be null. relatedTarget may also be set to null for security reasons, like when tabbing in or out of a page.
MouseEvent.relatedTarget is a similar property for mouse events.
Syntax
secondTarget = focusEvent.relatedTarget
Specifications
| Specification | Status | Comment |
|---|---|---|
| UI Events The definition of 'FocusEvent.relatedTarget' in that specification. | Working Draft | |
| Document Object Model (DOM) Level 3 Events Specification The definition of 'FocusEvent.relatedTarget' in that specification. | Obsolete | Initial definition. |
Browser compatibility
BCD tables only load in the browser
See also
- The
FocusEventinterface it belongs to.
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