Javascript 如何在Leavelt中设置一个不同于其他数组元素的样式？

我试图在数组中只设置一个元素的样式，但我不确定如何编写if语句。我希望实现

日期[0]

返回的权重为

3

，而数组中的其余元素返回的权重为

1

。这可能吗

功能：

var dates=[]
function mostRecent(time) {
    dates.push(time)
    if (dates[0]){
        weight = 3
    } else {
        weight = 1
    }
return weight
}

 pointToLayer: function(feature, latlng){  // changes default icons to circles and styles accordingly
            return new L.CircleMarker(latlng, {
                radius: circleSize(feature.properties.mag),
                fillColor: getColor(feature.properties.mag),
                color: "#000",
                weight: mostRecent(feature.properties.time),
                opacity: 1,
                fillOpacity: 0.5,
            });

风格：

var dates=[]
function mostRecent(time) {
    dates.push(time)
    if (dates[0]){
        weight = 3
    } else {
        weight = 1
    }
return weight
}

 pointToLayer: function(feature, latlng){  // changes default icons to circles and styles accordingly
            return new L.CircleMarker(latlng, {
                radius: circleSize(feature.properties.mag),
                fillColor: getColor(feature.properties.mag),
                color: "#000",
                weight: mostRecent(feature.properties.time),
                opacity: 1,
                fillOpacity: 0.5,
            });

请尝试以下操作：

var i = 0;

pointToLayer: function(feature, latlng){
    if(i === 0){
      return new L.CircleMarker(latlng, {
          radius: circleSize(feature.properties.mag),
          fillColor: getColor(feature.properties.mag),
          color: "#000",
          weight: 3,
          opacity: 1,
          fillOpacity: 0.5,
        }
      );
    }else{
      return new L.CircleMarker(latlng, {
          radius: circleSize(feature.properties.mag),
          fillColor: getColor(feature.properties.mag),
          color: "#000",
          weight: 1,
          opacity: 1,
          fillOpacity: 0.5,
        }
      );
    }
    i++;

  });

可能重复的