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window.onscroll = function() {myScrollIndicator()}; function myScrollIndicator() { var winScroll = document.body.scrollTop || document.documentElement.scrollTop; var height = document.documentElement.scrollHeight - document.documentElement.clientHeight; var scrolled = (winScroll / height) * 100; document.getElementById("myBar").style.width = scrolled + "%"; }
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<div class=“header”>
<div class="progress-container"> <div class="progress-bar" id="myBar"></div> </div>
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