To add Apple Touch icon for websites with HTML, we add link eleemnts for the icons.
For instance, we write
<link rel="apple-touch-icon" href="apple-touch-iphone.png" />
<link rel="apple-touch-icon" sizes="72x72" href="apple-touch-ipad.png" />
<link rel="apple-touch-icon" sizes="114x114" href="apple-touch-iphone4.png" />
<link
rel="apple-touch-icon"
sizes="144x144"
href="apple-touch-ipad-retina.png"
/>
to add link elements for icons with different sizes.
We specify the size as the value of the size attribute.
And we set the href attribute to the icon URL.
