the rain top is not cliped

bottom rain

I have more than one instance of L.Rain whose velocity and points are different from each other. I tried using L.layerGroup but it didn't work.

Here is my code. Note that rainSpots is a 3D array which contains arrays of [lat,long].
$.getJSON(precipitationFile, function(dat) {
// leaflet-rain layer
rainPoints = (dat['data']).reduce(function (acc, p) { if (p[2] > 0) { acc.push(p) } return acc; }, []);
console.log(rainPoints);
rainSpots = getRainSpots(rainPoints);
tempLayers = [];
for (i = 0; i < rainSpots.length; i++) {
rainSpot = rainSpots[i].map(function (p) { return [p[0], p[1]]; });
sumRainRate = (rainSpots[i].map(function (p) { return p[2]; })).reduce(function(a, b) { return a + b; });
rainRate = sumRainRate / rainSpots[i].length;
rainOptions = {
angle: 70,
width: 3,
spacing: 5,
length: 10,
interval: 11,
speed: rainRate,
color: '0x00FFFF'
};
temp = L.rain(rainSpots, rainOptions);
tempLayers.push(temp);
}
var rainLayers = new L.layerGroup(tempLayers);
layerControl.addOverlay(rainLayers, "Precipitation");
});

Here is the error message:
"There are too many active WebGL contexts on this page, the oldest context will be lost."

Demo only runs with jquery 3.3.1

I'm trying to use leaflet-rain on my map but I'm getting this error. Does the first line of bundle.js define the require function to solve this issue?

The demo is nice on the website, but it seems it's hard to use on my map. Below is what I have encountered. Hope it can be a test case :)

ERROR TypeError: Failed to execute 'attachShader' on 'WebGLRenderingContext': parameter 2 is not of type 'WebGLShader'.
at NewClass._initShaders (L.Rain.js:196)
at NewClass.onAdd (L.Rain.js:31)
at NewClass._layerAdd (leaflet-src.js:6595)
at NewClass.whenReady (leaflet-src.js:4459)
at NewClass.addLayer (leaflet-src.js:6657)
at NewClass.addTo (L.Rain.js:72)
at HeatmapComponent.percipitationDataHandler (heatmap.component.ts:342)
at SafeSubscriber.schedulerFn [as _next] (core.js:31089)
at SafeSubscriber.__tryOrUnsub (Subscriber.js:185)
at SafeSubscriber.next (Subscriber.js:124)