DOMRectReadOnly - Web APIs 编辑

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

Constructor

DOMRectReadOnly(): Defined to create a new DOMRectReadOnly object. Note that this constructor cannot be called by 3rd party JavaScript; doing so returns an "Illegal constructor" TypeError.

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

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

Specification	Status	Comment
Geometry Interfaces Module Level 1 The definition of 'DOMRectReadOnly' in that specification.	Candidate Recommendation	Initial definition.

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