MDN’s new design is in Beta! A sneak peek:

Type: URI
Set this to the URI of an image to appear in the tree cell. If this attribute is left out, no image appears. You can have both an image and a label.

See also

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 Contributors to this page: Sheppy, pippijn, mrolappe, Enn, Alexander.podgorny, Marsf, Ptak82, MarkFinkle
 Last updated by: Sheppy,