function customWayPoint(className, addClassName, customOffset) {
var waypoints = $(className).waypoint({
handler: function(direction) {
if (direction == "down") {
$(className).addClass(addClassName);
} else {
$(className).removeClass(addClassName);
}
},
offset: customOffset
});
}
var defaultOffset = '50%';
for (i = 0; i < 17; i++) {
customWayPoint('.timeline__item--' + i, 'timeline__item-bg', defaultOffset);
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