Having trouble retrieving all JSON properties

I am facing an issue with my json structure where I am unable to access certain properties. I can only access the main properties like type, properties, and so on within that hierarchy level. However, I cannot seem to access icon, iconURL, or title. The data is present but I can't access them individually.

When I try to retrieve just the title using

console.log(markerRE[i].properties)
, it displays all the properties perfectly. But when I specifically request the title, it throws an error saying
can't read property properties of undefined
.

var markerRE = [{}]; //JSON ARRAY

$.ajax({
    url: 'consulta4.php',
    data: {},
    method: 'POST',
    dataType: 'json',
    success: function (data) {
        for (var i = 0; i < Object.keys(data).length; i++) {
            markerRE.push({
                    "type": "Feature",
                    "geometry": {
                        "type": "Point",
                        "coordinates": [data[i].longitude, data[i].latitude]
                    },

                    "properties": {
                        "title": "Emergency: " + data[i].priority,
                        "id": data[i].id_emergency,
                        //"description":"<button class='RE'>oisdjos</button>", Alternative way to add html
                        "icon": {
                            "iconUrl": data[i].imagen,
                            "iconSize": [50, 50], // size of the icon
                            "iconAnchor": [25, 50], // point of the icon which will correspond to marker's location
                            "popupAnchor": [0, -25], // point from which the popup should open relative to the iconAnchor
                            "className": "dot"
                        }
                    }
                }


            );
            console.log(markerRE[i].properties.title);
        }
    }
});

Answer №1

Have you attempted defining markerRE as

var markerRE = []; //excluding {}

I experimented on my own, but I'm uncertain. Interestingly, using {} causes the counter to start at 1 instead of 0.

Answer №2

The methodology you are employing in the aforementioned code snippet appears somewhat perplexing to me, particularly with regards to looping through the keys in your dataset. One issue that stands out is the initialization of markerRE with an empty object contained within it from the outset. Rather than assigning it as an empty array []. Thus, attempting to access console.log(markerRE[0].properties.title); would result in an error since markerRE[0] is essentially an empty object.

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