41 lines
875 B
JavaScript
41 lines
875 B
JavaScript
var currentIndex = 0
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function nav(offset) {
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var items = document.querySelectorAll('.items:not(.disabled)')
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currentIndex += offset
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if (currentIndex < 0) {
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currentIndex += items.length
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}
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if (currentIndex >= items.length) {
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currentIndex -= items.length
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}
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items[currentIndex].focus()
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items[currentIndex].addEventListener('keydown', handleKeyDown)
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}
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function handleKeyDown(e) {
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switch (e.key) {
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case 'ArrowUp':
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e.preventDefault()
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e.stopPropagation()
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nav(-1)
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break
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case 'ArrowDown':
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e.preventDefault()
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e.stopPropagation()
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nav(1)
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break
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}
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}
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window.addEventListener('load', function (e) {
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// Select first item
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var items = document.querySelectorAll('.items:not(.disabled)')
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if (items.length > 0) {
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items[0].focus()
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items[0].addEventListener('keydown', handleKeyDown)
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}
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document.body.addEventListener('keydown', handleKeyDown)
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})
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