Angular scroll directive
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# Updates a variable when the window scrollTop position is changed. | |
# Usage: | |
# <set-window-scroll set-variable="windowScroll"></set-window-scroll> | |
app.directive "setWindowScroll", -> | |
restrict: "E" | |
scope: | |
setVariable: "=" | |
link: (scope) -> | |
$(window).scroll -> | |
# Need to call $apply here since we are changing the scope *asynchronously* (in scroll callback). | |
# See http://www.bennadel.com/blog/2449-Directive-Link-observe-And-watch-Functions-Execute-Inside-An-AngularJS-Context.htm | |
scope.$apply -> | |
scope.setVariable = $(window).scrollTop() |
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# Updates a variable when the window scrollTop position is changed. | |
# Usage: | |
# <set-window-scroll set-variable="windowScroll"></set-window-scroll> | |
app.directive "setWindowScroll", -> | |
restrict: "E" | |
scope: | |
setVariable: "=" | |
link: (scope) -> | |
# Throttle to 300ms so that we don't call $apply so often. | |
throttled = _.throttle -> | |
scope.$apply -> | |
scope.setVariable = $(window).scrollTop() | |
, 300 | |
$(window).scroll throttled |
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