leaflet 添加featureLayer 並自定義樣式

            let url = "https://xxx.arcgis.com/arcgis/rest/services/line_0706_3857/FeatureServer/0"; //此處為地址樣式，不是完整的地址，請填寫服務的完整地址。
                        
            var LineLayer = esri.featureLayer({
                url: url,
                style: function (feature) {
                    var c = '#007D7D';;
                    var o = 0.95;
                    let width = 3;
                    let gj = feature.properties.lineGJ;

                    if (gj > 0 && gj < 201) {
                        width = 3
                    } else if (gj < 200 && gj < 401) {
                        width = 5;
                    } else if (gj > 400) {
                        width = 7;
                    }

                    return { color: c, opacity: o, weight: width };
                }
            }).addTo(map);