19 lines
584 B
JavaScript
19 lines
584 B
JavaScript
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(function(d) {
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let f = d.querySelector('footer');
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f.insertAdjacentHTML(
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'afterbegin',
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'<p><a href="#help" title="Help" accesskey="?">?</a></p>')
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document.querySelector('[href="#help"]').onclick = e => {
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if (document.getElementById('help') == null) {
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f.insertAdjacentHTML(
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'beforebegin',
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'<div id="help"><h2>Key bindings</h2>' +
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[].map.call(
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document.querySelectorAll('[accesskey]'),
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e => e.accessKeyLabel + ": " + (e.title || e.innerText)).join('<br/>') +
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'</div>');
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}
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return true;
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};
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})(document)
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