我正在嘗試為一個項目創(chuàng)建一張美國地圖。為此，我使用d3.geoAlbersUsa()as 投影和d3.geoPath(projection)as 路徑函數(shù)。但是，當將“路徑”附加到我的 svg 時，似乎沒有設(shè)置“d”屬性。// Projection from geoAlbersUsalet projection = d3.geoAlbersUsa()                    .translate(width/2,height/2)                    .scale(10000);// Path from geoPath with the previous projectionlet path = d3.geoPath().projection(projection);let svg = d3.select("#svg");// Load in csv and json datad3.csv("state_results.csv", data => {  d3.json("states.json", json => {    // Process data from csv file and json file    ...    ...    ...    // Selecting 'g' element in svg and appending 'path'    d3.select("#map").selectAll("path")                .data(json.features)                .enter()                .append("path")                .attr("d", path)                .style("fill", d => {                    return d.properties.party;                });當我啟動我的服務(wù)器時，這是我檢查 svg 元素時顯示的內(nèi)容：關(guān)于為什么"d"沒有在每個路徑中正確設(shè)置屬性的任何想法？下面是數(shù)組中的一個元素json.features： {"type":"Feature","id":"49","properties":{"name":"Utah","density":34.30},"geometry":{"type":"Polygon","coordinates":[[[-112.164359,41.995232],[-111.047063,42.000709],[-111.047063,40.998429],[-109.04798,40.998429],[-109.053457,39.125316],[-109.058934,38.27639],[-109.042503,38.166851],[-109.042503,37.000263],[-110.499369,37.00574],[-114.048427,37.000263],[-114.04295,41.995232],[-112.164359,41.995232]]]}},javascript網(wǎng)頁格式svgd3.js小路