Question

我试图通过点击多边形来传递参数来绑定它，我有以下内容：

var mapLayer = new L.TopoJSON(jsonMap, {style: style, onEachFeature: onEachFeature.bind(null,null,selectionManager), pane:'borders'}).addTo(this.map); 


 function onEachFeature(feature, layer, selectionManager) {
                    console.log(selectionManager)
                    layer.on({
                        mouseover: highlightFeature,
                        mouseout: resetHighlight,
                        click: dataFilter.bind(null,ID)
                    });
                }

 function dataFilter(selectionManager,e){
                    var layer = e.target;
                    var zoneName = layer.feature.properties.Index;
                    console.log(zoneName)
                    console.log(selectionManager);
                }

所以我的目标是读取dataFilter中的参数（在本例中为selectionManager）

Answer 1

根据传单文档，onEachFeature需要是一个接收两个参数（feature和layer）的函数。按照您使用它的方式使用Function.prototype.bind并不能达到您想要的效果。

而是创建一个closure：

function onEachFeatureClosure(dataFilter) {
    return function onEachFeature(feature, layer) {
        // Your own logic, that uses dataFilter as well as feature and layer
    }
}

L.topoJSON(jsonMap, {
     style: style, 
     onEachFeature: onEachFeatureClosure(selectionManager),
     pane:'borders'
}).addTo(this.map);

请注意，onEachFeatureClosure(selectionManager)的返回值是一个类似function onEachFeature(feat, layer) {...}的函数。

将参数传递给oneachfeature传单

1 个答案: