DOMMatrix: DOMMatrix() constructor

init Optional

An array of numbers specifying the matrix you want to create, or a CSS transform string.

In case an array of numbers is passed, the behavior depends on the length of the array:

• for a 6-element array of components in the form [a, b, c, d, e, f], a 2D matrix is created, initialized with the provided components.
• for a 16-element array of components (in the column-major order) in the form [m11, m12, m13, …, m42, m43, m44], a 3D matrix is created, initialized with the provided components.

This example creates a DOMMatrix to use as an argument for calling DOMPointReadOnly.matrixTransform().

const point = new DOMPoint(5, 4);
const scaleX = 2;
const scaleY = 3;
const translateX = 12;
const translateY = 8;
const angle = Math.PI / 2;
const matrix = new DOMMatrix([
  Math.cos(angle) * scaleX,
  Math.sin(angle) * scaleX,
  -Math.sin(angle) * scaleY,
  Math.cos(angle) * scaleY,
  translateX,
  translateY,
]);
const transformedPoint = point.matrixTransform(matrix);