Arrow head not showing up

GoJS
1

If I use arrow head “Standard”, it works fine :

 $(go.Shape,  // the arrowhead
        { toArrow: 'Standard', stroke: null },)

image

If I use any other type of arrow, the head does not show up :

 $(go.Shape,  // the arrowhead
        { toArrow: 'DoubleForwardSlash', stroke: null },)

image

I’m probably missing something, but can’t figure out what ?

2

It’s probably because you have the stroke set to null. Many of the arrowheads are not filled, so with a null stroke you’ll see nothing.

To get an idea, check out the Arrowheads sample: the yellow is the fill, while the black is the stroke.