The convertToSpecifiedUnits() method of the SVGAngle interface allows you to convert the angle's value to the specified unit type.
This function will:
unitType property to the given unit typevalueInSpecifiedUnits and valueAsString properties so the angle value is represented in the given unit typeconvertToSpecifiedUnits(unitType)unitTypeA constant representing the unit type to which the angle's value should be converted. This must be one of the constant values defined for the unitType property, with the exception of SVG_ANGLETYPE_UNKNOWN.
SVGAngle.SVG_ANGLETYPE_DEG: convert to degreesSVGAngle.SVG_ANGLETYPE_RAD: convert to radiansSVGAngle.SVG_ANGLETYPE_GRAD: convert to gradiansSVGAngle.SVG_ANGLETYPE_UNSPECIFIED: convert to a unitless number, interpreted as degreesNone (undefined).
// Get an SVGAngle object
const svg = document.querySelector("svg");
const angle = svg.createSVGAngle();
// Set the angle's value in radians (Math.PI / 2)
angle.newValueSpecifiedUnits(SVGAngle.SVG_ANGLETYPE_RAD, Math.PI / 2);
// Retrieve the angle's value as a string
console.log(angle.valueAsString); // Output: 1.5708rad
console.log(angle.unitType); // Output: 3 (SVG_ANGLETYPE_RAD)
// Convert the angle's value to degrees
angle.convertToSpecifiedUnits(SVGAngle.SVG_ANGLETYPE_DEG);
// Retrieve the angle's value as a string
console.log(angle.valueAsString); // Output: 90deg
console.log(angle.unitType); // Output: 2 (SVG_ANGLETYPE_DEG)