This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The FocusEvent.relatedTarget read-only property represents a secondary target for this event, which will depend on the event itself. In some cases (like when tabbing in or out of a page), this property may be set to null for security reasons.
secondTarget = focusEvent.relatedTarget
| Specification | Status | Comment |
|---|---|---|
| Document Object Model (DOM) Level 3 Events Specification The definition of 'FocusEvent.relatedTarget' in that specification. | Obsolete | Initial definition. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | Yes | 48 | 9 | Yes | Yes |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | 48 | Yes | Yes | ? |
FocusEvent interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/FocusEvent/relatedTarget