The read-only sizes property of the HTMLLinkElement interface defines the sizes of the icons for visual media contained in the resource. It reflects the <link> element's sizes attribute, which takes a list of space-separated sizes, each in the format <width in pixels>x<height in pixels>, or the keyword any.
It is only relevant if the rel is icon or a non-standard type like apple-touch-icon.
A DOMTokenList object.
Although the sizes property itself is read-only in the sense that you can't replace the DOMTokenList object, you can still assign to the sizes property directly, which is equivalent to assigning to its value property. You can also modify the DOMTokenList object using the add(), remove(), replace(), and toggle() methods.
<link rel="icon" sizes="72x72 114x114" href="smallish.ico" />const link = document.querySelector("[rel=icon],[rel=apple-touch-icon]");
console.dir(link.sizes); /* output:
DOMTokenList [ "72x72", "114x114" ]
0: "72x72"
1: "114x114"
length: 2
value: "72x72 114x114"
*/
console.log(link.sizes.value); // output: '72x72 114x114'
console.log(link.sizes.length); // output: 2'
console.log(link.sizes[0]); // output: '72x72'
console.log(link.sizes[1]); // output: '114x114'