`hasLayer(layer)` showing unexpected behavior

LL team, many thanks for the mapping API.

I’ve some issues with hasLayer; the issue perhaps is a duplication (others have raised this issue before) but looking through all the discussions, I did not find a proper closing answer.

My display and other parts are working correctly. The issue is only in checking whether a layer exists and removing it.

Description of Issue and code parts: ‘hasLayer shows always false’ Layer definition:

    nasagibslayer01 = L.tileLayer(nasagibs_epsg4326_template + 'png', {
        layer: 'GHRSST_L4_MUR_Sea_Surface_Temperature',
        tileMatrixSet: '1km',
        time: _this_YYYY_MM_DD_stamp,
        tileSize: 512,
        subdomains: 'abc',
        noWrap: true,
        bounds: [
                        [-90, -180],
                        [90, 180]
                    ],
        opacity: layer01_opacity_value,
        zIndex: 10
    });
    layer01 = nasagibslayer01;
    
    if (!map.hasLayer(layer01)) {
        console.log('has not');
        map.addLayer(layer01);
    } else {
        console.log('has');
        map.removeLayer(layer01);
    }  

From external TimeDimension, the var _this_YYYY_MM_DD_stamp is updated and the snippet is called with every change of date, i.e., time: _this_YYYY_MM_DD_stamp is refreshed.

The console.log always shows ‘has not’, meaning either the Layer is not removed or hasLayer is not working.

Any suggestion?

Thanks

Environment

• Leaflet version: 1.4.0.
• Browser: Chrome, FireFox

[prasanjitdash]

Any further thoughts from the LL community? Thanks

[nicholasrolstad]

I have a similar issue. If I call map.hasLayer() on a layer that exists, it returns false when it should return true. When I call it on a layer that doesn’t exist, instead of returning false I get an Uncaught ReferenceError.

It’s strange, I’ve never had this issue before.