List of util functions to reuse
##verticalAlignElements Vertical align an absolute positionned element inside an relative positionned element by adding a negative margin-top that equals half the element itself.
##bypassFocus Set focus to the targeted element when user clicks on a bypass link. tabindex=-1 allows any dom element to be focused via javascript (Accessibility)
##handleHash If current hash matches an #id in the page, scroll to display it
##getTagObject Convert a preformatted string to object Example : sData = "type=clic;cat=action;name=Activite::Filtres::Prix::5_10euros"
##handleSticky Handle sticky nav: Add class .is-sticky when scrollTop is higher than 300px.