From 5bf75321fc3be2bd6b6d3d7acf11bce916dbe9bc Mon Sep 17 00:00:00 2001 From: Andrew Date: Mon, 7 Jul 2014 12:26:36 -0600 Subject: [PATCH] fix(tap): only check classList on tap target if it has classList Closes #1677 --- js/utils/tap.js | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/js/utils/tap.js b/js/utils/tap.js index c868f1e4d6..142a87c56e 100644 --- a/js/utils/tap.js +++ b/js/utils/tap.js @@ -530,7 +530,10 @@ function tapHasPointerMoved(endEvent) { } var endCoordinates = getPointerCoordinates(endEvent); - var releaseTolerance = (endEvent.target.classList.contains('button') ? TAP_RELEASE_BUTTON_TOLERANCE : TAP_RELEASE_TOLERANCE); + var hasClassList = endEvent.target.classList && endEvent.target.classList.contains; + var releaseTolerance = hasClassList & endEvent.target.classList.contains('button') ? + TAP_RELEASE_BUTTON_TOLERANCE : + TAP_RELEASE_TOLERANCE; return Math.abs(tapPointerStart.x - endCoordinates.x) > releaseTolerance || Math.abs(tapPointerStart.y - endCoordinates.y) > releaseTolerance;