DOMMatrixReadOnly: isIdentity property

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.

The readonlyisIdentity property of theDOMMatrixReadOnly interface is a Boolean whose value istrue if the matrix is theidentity matrix.

The identity matrix is one in which every value is0except those on the main diagonal from top-left to bottom-right corner (in other words, where the offsets in each direction are equal).

Value

A Boolean value.

Examples

// Initialize a 2D matrixconst matrix = new DOMMatrix(); // create a matrixconsole.log(matrix.isIdentity); // output: true// Apply a transform that has no effectconsole.log(matrix.translate(0).isIdentity); // output: true// Apply a transform with effect: this rotates the matrix by 30degconsole.log(matrix.rotate(30).isIdentity); // output: false