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Showing content from http://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/offsetX below:

MouseEvent: offsetX property - Web APIs

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1. Web
2. Web APIs
3. MouseEvent
4. offsetX

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• Value
• Specifications
• Browser compatibility
• See also

1. UI Events
2. MouseEvent
3. Constructor
   1. MouseEvent()
4. Static properties
   1. WEBKIT_FORCE_AT_FORCE_MOUSE_DOWN Non-standard
   2. WEBKIT_FORCE_AT_MOUSE_DOWN Non-standard
5. Instance properties
   1. altKey
   2. button
   3. buttons
   4. clientX
   5. clientY
   6. ctrlKey
   7. layerX Non-standard
   8. layerY Non-standard
   9. metaKey
   10. movementX
   11. movementY
   12. mozInputSource Non-standard
   13. offsetX
   14. offsetY
   15. pageX
   16. pageY
   17. relatedTarget
   18. screenX
   19. screenY
   20. shiftKey
   21. webkitForce Non-standard
   22. x
   23. y
6. Instance methods
   1. getModifierState()
   2. initMouseEvent() Deprecated
7. Inheritance
   1. UIEvent
   2. Event
8. Related pages for UI Events
   1. CompositionEvent
   2. FocusEvent
   3. InputEvent
   4. KeyboardEvent
   5. MouseScrollEvent Non-standard Deprecated
   6. MutationEvent Non-standard Deprecated
   7. TextEvent Deprecated
   8. UIEvent
   9. WheelEvent
9. Guides
   1. Code values for keyboard events
   2. Key values for keyboard events

• Value
• Specifications
• Browser compatibility
• See also

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since December 2015.

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The offsetX read-only property of the MouseEvent interface provides the offset in the X coordinate of the mouse pointer between that event and the padding edge of the target node.

A double floating point value in pixels.

Early versions of the spec defined this as an integer.

• MouseEvent
• Coordinate systems

.

This page was last modified on Mar 4, 2025 by MDN contributors.

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