DOMMatrix: rotateFromVectorSelf() method

Baseline Widely available

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

Note: This feature is available inWeb Workers.

TherotateFromVectorSelf() method of theDOMMatrix interface is a mutable transformation method that modifies a matrix by rotating the matrix by the angle between the specified vector and(1, 0). The rotation angle is determined by the angle between the vector(1,0)T and(x,y)T in the clockwise direction, or(+/-)arctan(y/x). Ifx andy are both0, the angle is specified as0, and the matrix is not altered.

To rotate a matrix from a vector without mutating it, seeDOMMatrixReadOnly.rotateFromVector(), which creates a new rotated matrix while leaving the original unchanged.

Syntax

rotateFromVectorSelf()rotateFromVectorSelf(rotX)rotateFromVectorSelf(rotX, rotY)

Parameters

rotXOptional: A number; The x-coordinate of x,y vector that determines the rotation angle. If undefined,0 is used.
rotYOptional: A number; The y-coordinate of x,y vector that determines the rotation angle. If undefined,0 is used.

Return value

Returns itself; the updatedDOMMatrix.

Examples

const matrix = new DOMMatrix(); // create a matrixconsole.log(matrix.rotateFromVectorSelf().toString());// output: matrix(1, 0, 0, 1, 0, 0) (no rotation applied)console.log(matrix.rotateFromVectorSelf(10, 20).toString());// output: matrix(0.447, 0.894, -0.894, 0.447, 0, 0)console.log(matrix.toString());// output: matrix(0.447, 0.894, -0.894, 0.447, 0, 0) (same as above)