files/en-us/web/api/dommatrix/skewxself/index.md
{{APIRef("Geometry Interfaces")}}{{AvailableInWorkers}}
The skewXSelf() method of the {{domxref("DOMMatrix")}} interface is a mutable transformation method that modifies a matrix. It skews the source matrix by applying the specified skew transformation along the X-axis and returns the skewed matrix.
To skew a matrix along the X-axis without mutating it, see {{domxref("DOMMatrixReadOnly.skewX()")}}
skewXSelf()
skewXSelf(sX)
sX
Returns itself; the DOMMatrix skewed along the X-axis by the given
angle.
const matrix = new DOMMatrix(); // create a matrix
console.log(matrix.toString()); // output: "matrix(1, 0, 0, 1, 0, 0)"
matrix.skewXSelf(14); // mutate it
console.log(matrix); // output: "matrix(1, 0, 0.25, 1, 0, 0)"
{{Specifications}}
{{Compat}}
transform attribute