HTMLSourceElement: src property

The src property of the HTMLSourceElement interface is a string indicating the URL of a media resource to use as the source for the element.

It reflects the src attribute of the element nested in an or element. It has no meaning and is ignored when it is nested in a element.

const el = document.getElementById("el");
console.log(el.src); // Output: "large.webp"
el.src = "medium.webp"; // Updates the src value