The baseVal property of the SVGAnimatedInteger interface represents the base (non-animated) value of an animatable <integer>.
Some attributes, like the numOctaves attribute of the <feTurbulence> element or the order attribute of the <feConvolveMatrix> accept a long integer as a value. This property provides access to the static non-animated state of the attribute as a number.
A long; the base (non-animated) value of the reflected attribute.
const feTurbulence = document.querySelector("feTurbulence");
// Set the animatable 'numOctaves' attribute
feTurbulence.setAttribute("numOctaves", "4");
// Access the SVGAnimatedInteger object
const animatedInteger = feTurbulence.numOctaves;
// Get the base value
console.log(animatedInteger.baseVal); // Output: 4
// Modify the base value
animatedInteger.baseVal = 6;
// Verify the reflected attribute value
console.log(feTurbulence.getAttribute("numOctaves")); // Output: "6"