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show "back to top" only when needed

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This commit is contained in:
botsi 2020-02-03 21:26:34 +01:00
parent 6162b3fcae
commit b30754a243
1 changed files with 27 additions and 15 deletions
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12
boday_it/static/js/base.js
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@ -33,6 +33,18 @@ var Cl = window.Cl || {};
'lowerThan': 'boxShadow'
});
}
// custom functions "botsicode"
const backTop = document.querySelector('.list-inline .pull-right'),
bodyContainer = document.querySelector('body>div.container'),
shBackTop = function() {
if (backTop && bodyContainer) {
backTop.style.opacity = +(bodyContainer.offsetTop + bodyContainer.getBoundingClientRect().height > window.innerHeight);
}
};
$(window).resize(shBackTop);
$(window).scroll(shBackTop);
shBackTop();
});
})(jQuery);