In JavaScript I have this test 'ontouchstart' in document.documentElement
. If the event exists (even if null) it evaluates to true
otherwise to false
. I don't know how to do the equivalent in CoffeeScript. Writing it exactly as is translates to using an __indexOf
function which does not do the same thing (it is always returning false).
You can also try 'onmousemove'
for an event that always exists.
Use of
instead :
'ontouchstart' of document.documentElement
From the documentation :
You can use
in
to test for array presence, andof
to test for JavaScript object-key presence.
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