Uncaught TypeError: Cannot read property 'toLowerCase' of null
maphilight should detect this case and default to a rect value if the shape attribute is not in the element.
Additionally, there is a fourth "shape" that the shape attribute can describe: the confusingly named default (which is not the default value when the shape attribute is omitted). It specifies that the entire map area is a hot-spot region, and such an area tag would not have coords attribute (in fact it MUST not, according to the spec).
maphilight makes the assumption that the map
areatags will always have ashapeattribute.However, according to the HTML spec, the
shapeattribute may be omitted. When this occurs, theshapeattribute should be assumed to be therectvalue.If this attribute is omitted (as with the removeRedundantAttributes option of html-minifier), the library fails to initialize and will produce an error on hover:
maphilight should detect this case and default to a
rectvalue if theshapeattribute is not in the element.Additionally, there is a fourth "shape" that the
shapeattribute can describe: the confusingly nameddefault(which is not the default value when theshapeattribute is omitted). It specifies that the entire map area is a hot-spot region, and such an area tag would not havecoordsattribute (in fact it MUST not, according to the spec).maphilight incorrectly assumes that both a
coordsattribute must exist on anareatag, and that the shape of the area cannot bedefault.