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I have an interactive map based on MapBox WebGL. I have an 'on click' function which is returning all information on data layers at that location (lovely). For each object I am trying to pull out just 'layer.id' (layer title) and 'layer.properties'(held as an object) and display that only.

I can't change the geojson so i need to be able to access the properties without knowing what they keys are.

I figured it would just be a case of looping through as an object array but i can't get it right.

Currently this partially works in the console;

map.on('click', function (e) {
        map.featuresAt(e.point, {radius: 5, layer: lyrlist}, function (err, features) {
        if (err) throw err;
        //console.log(features)

        var keys = Object.keys(features);
        var val = "";

        for (var i = 0; i < keys.length; i++) {
            val = features[keys[i]];

    //console.log(val.layer.id,val.properties); shows layer title and property object in console.

        }           
        //document.getElementById('features').innerHTML = JSON.stringify(features, null, 2); Shows all info in panel.
    });
});

link to demo site: http://www.activenaturalist.org.uk/lcren/imap/mb.html

1

This is now a duplicate and has been (better asked) answered in full here: https://stackoverflow.com/questions/35459896/format-complex-nested-objects/35472272

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