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Deploy website version based on 34e942e835
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Website Deployment Script 2019-11-28 19:53:49 +00:00
parent fbb1f94ea8
commit efad63d6c5
2 changed files with 27 additions and 20 deletions
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37
js/scrollSpy.js
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@ -5,50 +5,56 @@
* LICENSE file in the root directory of this source tree.
*/
/* eslint-disable prefer-arrow-callback */
/* eslint-disable */
(function scrollSpy() {
const OFFSET = 10;
let timer;
let headingsCache;
const findHeadings = function findHeadings() {
var OFFSET = 10;
var timer;
var headingsCache;
var findHeadings = function findHeadings() {
return headingsCache || document.querySelectorAll('.toc-headings > li > a');
};
const onScroll = function onScroll() {
var onScroll = function onScroll() {
if (timer) {
// throttle
return;
}
timer = setTimeout(function() {
timer = null;
let activeNavFound = false;
const headings = findHeadings(); // toc nav anchors
var activeNavFound = false;
var headings = findHeadings(); // toc nav anchors
/**
* On every call, try to find header right after <-- next header
* the one whose content is on the current screen <-- highlight this
*/
for (let i = 0; i < headings.length; i++) {
for (var i = 0; i < headings.length; i++) {
// headings[i] is current element
// if an element is already active, then current element is not active
// if no element is already active, then current element is active
let currNavActive = !activeNavFound;
var currNavActive = !activeNavFound;
/**
* Enter the following check up only when an active nav header is not yet found
* Then, check the bounding rectangle of the next header
* The headers that are scrolled passed will have negative bounding rect top
* So the first one with positive bounding rect top will be the nearest next header
*/
if (currNavActive && i < headings.length - 1) {
const heading = headings[i + 1];
const next = decodeURIComponent(heading.href.split('#')[1]);
const nextHeader = document.getElementById(next);
var heading = headings[i + 1];
var next = decodeURIComponent(heading.href.split('#')[1]);
var nextHeader = document.getElementById(next);
if (nextHeader) {
const top = nextHeader.getBoundingClientRect().top;
var top = nextHeader.getBoundingClientRect().top;
currNavActive = top > OFFSET;
} else {
console.error('Can not find header element', {
id: next,
heading,
heading: heading,
});
}
}
@ -56,6 +62,7 @@
* Stop searching once a first such header is found,
* this makes sure the highlighted header is the most current one
*/
if (currNavActive) {
activeNavFound = true;
headings[i].classList.add('active');