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41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
/*
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When showing the sticky version warning, the warning will cover the
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scroll target when navigating to #id hash locations. Take over scrolling
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to adjust the position to account for the height of the warning.
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*/
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$(() => {
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const versionWarning = $('.version-warning')
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// Skip if there is no version warning, regular browser behavior is
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// fine in that case.
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if (versionWarning.length) {
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const height = versionWarning.outerHeight(true)
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const target = $(':target')
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// Adjust position when the initial link has a hash.
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if (target.length) {
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// Use absolute scrollTo instead of relative scrollBy to avoid
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// scrolling when the viewport is already at the bottom of the
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// document and has space.
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const y = target.offset().top - height
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// Delayed because the initial browser scroll doesn't seem to
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// happen until after the document ready event, so scrolling
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// immediately will be overridden.
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setTimeout(() => scrollTo(0, y), 100)
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}
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// Listen to clicks on hash anchors.
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$('a[href^="#"]').on('click', e => {
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// Stop default scroll. Also stops the automatic URL hash update.
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e.preventDefault()
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// Get the id to scroll to and set the URL hash manually.
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const id = $(e.currentTarget).attr('href').substring(1)
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location.hash = id
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// Use getElementById since the hash may have dots in it.
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const target = $(document.getElementById(id))
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// Scroll to top of target with space for the version warning.
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scrollTo(0, target.offset().top - height)
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})
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}
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})
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