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October 31, 2019 20:37
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| const barHeight = 72; | |
| const list = document.querySelectorAll('a h3'); | |
| let index = 0; | |
| list[index].classList.add('selected'); | |
| document.body.addEventListener('keydown', e => { | |
| if (e.keyCode === 38 || e.keyCode === 40) { e.preventDefault(); } | |
| }); | |
| document.body.addEventListener('keyup', e => { | |
| const { keyCode, shiftKey } = e; | |
| if (keyCode === 38) { index--; } // arrow up | |
| if (keyCode === 40) { index++; } // arrow down | |
| list.forEach(item => { | |
| item.classList.remove('selected'); | |
| }); | |
| if (index >= 0 && index < list.length) { | |
| if (keyCode === 13) { // enter | |
| const link = list[index].parentNode.href; | |
| if (shiftKey) { | |
| window.open(link, '_blank'); | |
| } else { | |
| document.location.href = link; | |
| } | |
| } | |
| const current = list[index]; | |
| current.classList.add('selected'); | |
| const { y, height } = current.getBoundingClientRect(); | |
| const elBottom = y + height + window.scrollY; | |
| const wBottom = window.innerHeight + window.scrollY; | |
| if (elBottom > wBottom || y < 0) { | |
| window.scrollTo({ | |
| behavior: 'smooth', | |
| top: window.scrollY + y - barHeight | |
| }); | |
| } | |
| } else { | |
| index = -1; | |
| } | |
| if (keyCode === 80) { // p | |
| [...document.querySelectorAll('a span')].find(e => ['Картинки', 'Images'].includes(e.parentNode.innerText)).parentNode.click(); | |
| } | |
| }); | |
| /** | |
| * CSS | |
| * | |
| .selected { | |
| position: relative; | |
| } | |
| .selected::after { | |
| content: '►'; | |
| position: absolute; | |
| left: -20px; | |
| color: #0000ff; | |
| } | |
| */ |
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