Mdn focusevent. focus() method sets focus on the specified element, if it can be focused. This event is typically triggered by clicking the right mouse button, or by pressing the context menu key. The activeElement read-only property of the Document interface returns the Element within the DOM that is receiving keyboard events such as keydown and keyup. The EventTarget interface is implemented by objects that can receive events and may have listeners for them. The focus event is fired when an element has received focus. The community reviewed whether to reopen this question 1 year ago and left it closed: Duplicate This question has been answered, is not unique, and doesn’t differentiate itself from The :focus-visible pseudo-class applies while an element matches the :focus pseudo-class and the UA (User Agent) determines via heuristics that the focus should be made evident on The FocusEvent() constructor returns a newly created FocusEvent object with an optional EventTarget. Event bubbling Previous Overview: Dynamic scripting with JavaScript Next We've seen that a web page is composed of elements — headings, paragraphs of text, images, buttons, and so This interface also inherits properties from its parent UIEvent, and indirectly from Event. When the event has both a source and a destination, the relatedTarget value must be set to the FocusEvent 接口表示和焦点相关的事件比如 focus, blur, focusin, 和 focusout。 Events are fired to notify code of "interesting changes" that may affect code execution. focus() method sets focus on a specified element, enabling user interaction if the element is focusable. These can arise from user interactions such as using a mouse or resizing a window, The Event interface represents an event which takes place on an EventTarget. 3ii ddbi d15o psn4 1yp