44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
(function(window) {
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"use strict";
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window.ls.container.get("view").add({
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selector: "data-forms-nav",
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repeat: false,
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controller: function(element, view, container, document) {
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let titles = document.querySelectorAll('[data-forms-nav-anchor]');
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let links = element.querySelectorAll('[data-forms-nav-link]');
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let minLink = null;
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let check = function() {
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let minDistance = null;
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let minElement = null;
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for (let i = 0; i < titles.length; ++i) {
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let title = titles[i];
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let distance = title.getBoundingClientRect().top;
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console.log(i);
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if((minDistance === null || minDistance >= distance) && (distance >= 0)) {
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if(minLink) {
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minLink.classList.remove('selected');
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}
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console.log('old', minLink);
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minDistance = distance;
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minElement = title;
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minLink = links[i];
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minLink.classList.add('selected');
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console.log('new', minLink);
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}
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}
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};
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window.addEventListener('scroll', check);
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check();
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}
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});
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})(window);
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