javascript - underscorejs render different results depending on environment when passing strings with colons to it -

i'm running framework meteor based on nodejs. when use underscorejs on server strange results. on server code returns true

_.contains(['s:s:s'], 's:s');

but in chromes inspector returns false (as expected).

on underscorejs says use native indexof internally. code:

['s:s:s'].indexof('s:s')

return -1 both on server , in inspector (as expected, seems strange renders different results if used internally underscorejs.)

i'm not sure if caused underscorejs, nodejs or meteor.

i've managed replicate result. issue coming underscore, doesn't happen version 1.4.4, 1.4.2.

DIs