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debounce timer commit cleanup - cw #71

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debounce timer commit cleanup - cw #71

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50 changes: 50 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,14 @@
});
}

function debounce(func, delay) {
let timer;
return function (...args) {
clearTimeout(timer);
timer = setTimeout(() => func.apply(this, args), delay);
};
}

var story = document.getElementById('story');
var features = document.createElement('div');
features.setAttribute('id', 'features');
Expand Down Expand Up @@ -291,6 +299,48 @@
// instantiate the scrollama
var scroller = scrollama();

var debouncedStepEnter = debounce(async function (response) {
var current_chapter = config.chapters.findIndex(chap => chap.id === response.element.id);
var chapter = config.chapters[current_chapter];

response.element.classList.add('active');
map[chapter.mapAnimation || 'flyTo'](chapter.location);

if (config.showMarkers) {
marker.setLngLat(chapter.location.center);
}
if (chapter.onChapterEnter.length > 0) {
chapter.onChapterEnter.forEach(setLayerOpacity);
}
if (chapter.callback) {
window[chapter.callback]();
}
if (chapter.rotateAnimation) {
map.once('moveend', () => {
const rotateNumber = map.getBearing();
map.rotateTo(rotateNumber + 180, {
duration: 30000,
easing: t => t
});
});
}
if (config.auto) {
var next_chapter = current_chapter + 1;
if (next_chapter < config.chapters.length) {
map.once('moveend', () => {
document.querySelectorAll('[data-scrollama-index="' + next_chapter.toString() + '"]')[0].scrollIntoView();
});
}
}
}, 100);

var debouncedStepExit = debounce(function (response) {
var chapter = config.chapters.find(chap => chap.id === response.element.id);
response.element.classList.remove('active');
if (chapter.onChapterExit.length > 0) {
chapter.onChapterExit.forEach(setLayerOpacity);
}
}, 100);

map.on("load", function () {
if (config.use3dTerrain) {
Expand Down