The focusin event is fired when an element is about to receive focus. The main difference between this event and focus is that the latter doesn't bubble.
FocusEvent| Property | Type | Description |
|---|---|---|
target Read only
| EventTarget | Element receiving focus. |
type Read only
| DOMString | The type of event. |
bubbles Read only
| Boolean | Whether the event normally bubbles or not. |
cancelable Read only
| Boolean | Whether the event is cancellable or not. |
relatedTarget Read only
|
EventTarget (DOM element) | Element losing focus, if any. |
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| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 52 (52) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 52.0 (52) | (Yes) | ? | (Yes) |
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https://developer.mozilla.org/en-US/docs/Web/Events/focusin