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/* eslint-env browser */
import {
empty,
filterMultipleArrays,
stitchArrays,
} from '../../shared-util/sugar.js';
export const info = {
id: 'summaryNestedLinkInfo',
summaries: null,
links: null,
};
export function getPageReferences() {
info.summaries =
Array.from(document.getElementsByTagName('summary'));
info.links =
info.summaries
.map(summary =>
Array.from(summary.getElementsByTagName('a')));
filterMultipleArrays(
info.summaries,
info.links,
(_summary, links) => !empty(links));
}
export function addPageListeners() {
for (const {summary, links} of stitchArrays({
summary: info.summaries,
links: info.links,
})) {
for (const link of links) {
link.addEventListener('mouseover', () => {
link.classList.add('nested-hover');
summary.classList.add('has-nested-hover');
});
link.addEventListener('mouseout', () => {
link.classList.remove('nested-hover');
summary.classList.remove('has-nested-hover');
});
}
}
}
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