js detailed introduction to events

Commonly used events:

1. Mouse events: onClick, onDblClick, onMouseDown, onMouseUp, onMouseOut, onMouseOver

·onClick: Occurs when a page element is clicked, onDblClick: Occurs when double-clicking a page element Occurs when you move into the specified element range and release the pressed left button.

2. Keyboard events: onKeyPress, onKeyDown, onKeyUp.

·onKeyDown, onKeyPress, onKeyUp respectively means that the user presses a key but does not release it. Occurs when the keyboard is clicked, and when the keyboard is pressed and released.

3. Form events: onSubmit, onReset, onChange, onSelect

·onSubmit: Occurs when the user submits the form

·onChange: When the user changes Occurs when a value on the page is selected, such as selecting an item in a drop-down list.

·onReset: Occurs when the form data is reset

·onSelect: Occurs when the user selects text from the text box.

4. Read event:

·OnAbort: The user stops the browser and continues to download the image

·onError: When the browser loads the web page or When an image error occurs

·onLoad: Occurs when an image or page loads

·onResize: Occurs when the browser or frame window is resized

·onUnload: When the user Occurs when leaving the page.

·onFocus: When the object gains focus through user interaction, such as clicking a text box

·onBlur: When the object is no longer the focus. For example, click in the text box and then click outside the text box.

5. Other events:

·onAfterUpdate(IE4): When an element with bundled data on the page completes updating the data source

· onBeforeUpdate(IE4): Occurs when the data in the element changes and is about to lose focus, before the data source is updated

·onBounce(IE4): When the content in the selection box element extends beyond the boundary of the selection box External time

·onHelp: Occurs when the browser's help button is pressed

·onMove(NS4): Occurs when the browser window or frame moves

·onReadyStateChange(IE4 ): Occurs when the state of the specified element is changed

·onRowEnter, onRowExit(IE4): Occurs after the record pointer of the current bundled data source is changed and is about to change respectively

·onScroll(IE4 ): Occurs when the user drags the scroll bar

·onStart: Occurs when the content in the selection box element starts to loop

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