Is there any idle event for mapbox gl js? - mapbox

Question

I need some sort of google maps "idle" event for mapbox gl.
When every event fired and the map stop zoomin/out drag etc. and every layer has loaded, and the map is idle.
I have to use this code
map.on("render", function(e) {
if(map.loaded() && triggerOnce === true) {
//fires on zoomin runing
triggerOnce = false;
console.log("Render end")
setTimeout(somefunc(),1000)
}
})

Answer 1

Yes, as of mapbox-gl-js v0.52.0 there is now an idle event you can use. According to the docs:
Fired after the last frame rendered before the map enters an "idle"
state:
No camera transitions are in progress
All currently requested tiles have loaded
All fade/transition animations have completed
To use it:
map.once('idle', (e) => {
// do things the first time the map idles
});
map.on('idle', (e) => {
// do things every time the map idles
});
Demo: http://jsfiddle.net/godoshian/yrf0b9xt/
// Data from http://geojson.xyz/
const geojsonSource = 'https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_populated_places.geojson';
const outputContainer = document.getElementById('output-container');
mapboxgl.accessToken = 'pk.eyJ1IjoiY2NoYW5nc2EiLCJhIjoiY2lqeXU3dGo1MjY1ZXZibHp5cHF2a3Q1ZyJ9.8q-mw77HsgkdqrUHdi-XUg';
function createMap(container, layer = null) {
const map = new mapboxgl.Map({
container,
style: 'mapbox://styles/mapbox/light-v9',
});
map.on('idle', () => {
outputContainer.innerHTML += `${container} idle<br>`;
});
if (layer) {
map.on('load', () => {
map.addLayer(layer);
});
}
return map;
}
const map = createMap('map1');
setTimeout(() => {
fetch(geojsonSource)
.then(response => {
if (response.ok) return response.json();
throw Error(response);
})
.then(json => {
let layer = {
id: 'populated-places',
source: {
type: 'geojson',
data: json,
},
type: 'circle',
}
map.addLayer(layer);
createMap('map2', layer);
})
.catch(error => {
console.log(error);
})
}, 5000);
#demo {
display: flex;
flex-direction: row;
justify-content: space-evenly;
}
#demo #output-container {
flex: 1;
}
#demo .map {
height: 300px;
flex: 2;
}
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.52.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.52.0/mapbox-gl.css' rel='stylesheet' />
<div id="demo">
<div id="output-container">
</div>
<div id="map1" class="map">
</div>
<div id="map2" class="map">
</div>
</div>
Relevant PR: https://github.com/mapbox/mapbox-gl-js/pull/7625
Docs: https://www.mapbox.com/mapbox-gl-js/api/#map.event:idle

Answer 2

just listen to moveend event, it will be fired after any moves on the map like dragging, zooming, rotating and pitching.

Answer 3

idle, not working, because it fire event every 1 second, continues trigger event.
map.on('idle', (e) => {
use moveend event instead.
map.on('moveend', (e) => {

Answer 4

You can have similar event by using setTimeout to monitor the onViewPortChange event
var changingViewPortTimeout;
onViewportChange(viewport) {
if (changingViewPortTimeout) {
clearTimeout(changingViewPortTimeout);
}
changingViewPortTimeout = setTimeout(function () {
onIdle(viewport);
}, 200)
});
}