为什么小叶的resetStyle对我不起作用？

Question

I want to draw a map with few routes drawn on it.

I want to have a dropbox with numbers 1,..,n

when an item in the dropbox is chosen, the corresponding route is highlighted on the map.

I have started using "leaflet".

why doesn't my resetStyle() return the lines to their original style?

here is my code:

 document.onload = loadMap(); function loadMap() { var map = L.map('map').setView([37.8, -96], 4); L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}', { attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors,<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://mapbox.com">Mapbox</a>', maxZoom: 18, id: 'mapbox.streets', accessToken: 'pk.eyJ1IjoiZW==========yJ9.3HqHQ4BMRvSPaYe8ToA7YQ' }).addTo(map); var marker = L.marker([51.5, -0.09]).addTo(map); var myLines = [{ "type": "LineString", "properties": { "id": "1" } "coordinates": [ [-100, 40], [-105, 45], [-110, 55] ] }, { "type": "LineString", "properties": { "id": "2" } "coordinates": [ [-105, 40], [-110, 45], [-115, 55] ] }]; var myLayer = L.geoJson().addTo(map); myLayer.addData(myLines); geojson = L.geoJson(myLines, { onEachFeature: onEachFeature }).addTo(map); } function highlightFeature(e) { var layer = e.target; layer layer.setStyle({ weight: 25, color: '#ff3300', dashArray: '', fillOpacity: 0.7 }); if (!L.Browser.ie && !L.Browser.opera) { layer.bringToFront(); } } function resetHighlight(e) { geojson.resetStyle(e.target); layer.setStyle({ weight: 5, color: '#0000ff', dashArray: '', fillOpacity: 0.7 }); } function onEachFeature(feature, layer) { layer.on({ mouseover: highlightFeature, mouseout: resetHighlight, // click: zoomToFeature }); } $('select[name="dropdown"]').change(function() { var item = $(this).val(); alert("call the do something function on option " + item); //how to make the chosen line highlighted ?? }); 

Answer 1

The resetStyle method of L.GeoJSON reset the given layer's style back to the style defined when initializing the L.GeoJSON layer:

Resets the given vector layer's style to the original GeoJSON style, useful for resetting style after hover events.

http://leafletjs.com/reference.html#geojson-resetstyle

Code example:

var geojsonLayer = new L.GeoJSON(geojson, {
    style: function () {
        return {
            color: 'red'
        }
    },
    onEachFeature: function (feature, layer) {
        layer.on('mouseover', function () {
            this.setStyle({
                color: 'green'
            });
        });
        layer.on('mouseout', function () {
            geojsonLayer.resetStyle(this);
        });
    }
}).addTo(map);

Working example on Plunker: http://plnkr.co/edit/iriGMBYiFRizeXizMF06?p=preview