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制作传单地图时出现“ t未定义”错误？

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当我单击“ resetMap”按钮时，我的WebConsole告诉我“ t未定义”。这是resetMap函数的javascript 

function resetMap() {

    /* This creates a variable which groups the layers.
    */

    var layerGroup = L.layerGroup([Frog1Layer,Frog2Layer,Frog3Layer,Frog4Layer,Frog5Layer,Frog6Layer,Frog7Layer,Frog8Layer]);


    /* This removes the variable layerGroup from the map.
    */

    map.removeLayer(layerGroup);

    /* This changes the map centre & zoom level to default.
    */

    map.setView(new L.LatLng(0,0),1);
}

这是控制台中的错误

TypeError: t is undefinedleaflet.js:5:652

u https://unpkg.com/leaflet@1.5.1/dist/leaflet.js:5

getLayerId https://unpkg.com/leaflet@1.5.1/dist/leaflet.js:5

addLayer https://unpkg.com/leaflet@1.5.1/dist/leaflet.js:5

initialize https://unpkg.com/leaflet@1.5.1/dist/leaflet.js:5

i https://unpkg.com/leaflet@1.5.1/dist/leaflet.js:5

layerGroup https://unpkg.com/leaflet@1.5.1/dist/leaflet.js:5

resetMap file:///F:/GIS Assessment 1/MyScript.js:247

onclick file:///F:/GIS Assessment 1/MyHTML.html:1

我该如何解决？

huangshaoxu 回答：制作传单地图时出现“ t未定义”错误？

错误描述应该非常准确：您的图层之一未定义。

您可以跳过创建图层组的操作，

let layers = [Frog1Layer,Frog2Layer,Frog3Layer,Frog4Layer,Frog5Layer,Frog6Layer,Frog7Layer,Frog8Layer]

for (let layer of layers) {
  if (layer) {
    map.removeLayer(layer)
  }
}
javascriptleafletundefined
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