Show the loader when the map is initialised.

[arfa]

Hi, I think that the loader must be displayed by default. Later when the layer is loaded, the event load will trigger and the event handler will hide the loader.

In fact the event loading is triggred before the method _addLayerListeners is called. so the plugin dosn't handle the first time the map is loading.

I suggest the following fix.

onAdd: function(map) {
    ...

    // Create the loading indicator
    var classes = 'leaflet-control-loading';

    ...
}

becomes

onAdd: function(map) {
    ...

    // Create the loading indicator
    var classes = 'leaflet-control-loading is-loading';

    ...
}

This way the loader appears when the map is loading for the first time.

[ebrelsford]

Yes, this has been on my mind, the only issue is that this solution assumes that a load event will be triggered at some point. That's impossible to ensure if we didn't detect loading initially.

I'd be interested to see if there's a way to add the event listeners early enough to ensure that we get all the loading events.

[benjeffery]

I got around this by checking if the _loading flag is set. Prob a bit hacky but fixed the issue for me. See https://github.com/benjeffery/Leaflet.loading/commit/339c1338753a9f5c7d8a074628da19093906eae3

[ebrelsford]

If someone wanted to add this as an option and submit a PR I'd fold it in. I don't think we should rely on an internal member (_loading) by default.