45 行
978 B
JavaScript
45 行
978 B
JavaScript
(function () {
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let searchBar, results;
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const keymap = {
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ArrowUp: goUp,
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ArrowDown: goDown,
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k: goUp,
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j: goDown,
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'/': focusSearch,
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};
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let activeIdx = -1;
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document.addEventListener('DOMContentLoaded', () => {
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searchBar = document.querySelector('#search-bar');
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results = document.querySelectorAll('#main>div>div>div>a');
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});
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document.addEventListener('keydown', (e) => {
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if (e.target.tagName === 'INPUT') return true;
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if (typeof keymap[e.key] === 'function') {
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e.preventDefault();
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keymap[e.key]();
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}
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});
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function goUp () {
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if (activeIdx > 0) focusResult(activeIdx - 1);
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else focusSearch();
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}
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function goDown () {
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if (activeIdx < results.length - 1) focusResult(activeIdx + 1);
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}
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function focusResult (idx) {
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activeIdx = idx;
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results[activeIdx].scrollIntoView({ behavior: 'smooth', block: 'center', inline: 'nearest' });
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results[activeIdx].focus();
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}
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function focusSearch () {
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activeIdx = -1;
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searchBar.focus();
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}
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}());
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