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DOMRectReadOnly

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This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

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Note: This feature is available in Web Workers.

The DOMRectReadOnly interface specifies the standard properties (also used by DOMRect) to define a rectangle whose properties are immutable.

Constructor

DOMRectReadOnly(): Defined to create a new DOMRectReadOnly object.

Instance properties

DOMRectReadOnly.x Read only: Returns the x coordinate of the DOMRectReadOnly's origin.
DOMRectReadOnly.y Read only: Returns the y coordinate of the DOMRectReadOnly's origin.
DOMRectReadOnly.width Read only: Returns the width of the DOMRectReadOnly.
DOMRectReadOnly.height Read only: Returns the height of the DOMRectReadOnly.
DOMRectReadOnly.top Read only: Returns the top coordinate value of the DOMRectReadOnly (usually the same as y).
DOMRectReadOnly.right Read only: Returns the right coordinate value of the DOMRectReadOnly (usually the same as x + width).
DOMRectReadOnly.bottom Read only: Returns the bottom coordinate value of the DOMRectReadOnly (usually the same as y + height).
DOMRectReadOnly.left Read only: Returns the left coordinate value of the DOMRectReadOnly (usually the same as x).

Static methods

DOMRectReadOnly.fromRect(): Creates a new DOMRectReadOnly object with a given location and dimensions.

Instance methods

DOMRectReadOnly.toJSON(): Returns a JSON-serializable plain object representing the DOMRectReadOnly object. Automatically called by JSON.stringify().

Specifications

Specification
Geometry Interfaces Module Level 1 # domrectreadonly

Browser compatibility

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This page was last modified on Sep 28, 2026 by MDN contributors.

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