我有一个闪亮的应用程序，它将数据发送到D3脚本以构建双垂直图表。刷新数据后，图表必须更新。为此我使用d3.select('svg').remove()。问题是图表是在彼此之上构建的。我已经包含了我正在使用的JS文件的可重现示例。这里我提供了一个静态数据集。
<!DOCTYPE html>
<meta charset="utf-8">
<style>
text{
font-size:12px;
}
.mainBars rect{
shape-rendering: auto;
fill-opacity: 0;
stroke-width: 0.5px;
stroke: rgb(0, 0, 0);
stroke-opacity: 0;
}
.subBars{
shape-rendering:crispEdges;
}
.edges{
stroke:none;
fill-opacity:0.5;
}
.header{
text-anchor:middle;
font-size:16px;
}
line{
stroke:grey;
}
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="http://vizjs.org/viz.v1.0.0.min.js"></script>
<script>
var data=[['Lite','CA',16,0],
['Small','CA',1278,4],
['Medium','CA',27,0],
['Plus','CA',58,0],
['Grand','CA',1551,15],
['Elite','CA',141,0],
['Lite','AZ',5453,35],
['Small','AZ',683,1],
['Medium','AZ',862,0],
['Grand','AZ',6228,30],
['Lite','AL',15001,449],
['Small','AL',527,3],
['Medium','AL',836,0],
['Plus','AL',28648,1419],
['Grand','AL',3,0],
['Lite','CO',13,0],
['Small','CO',396,0],
['Medium','CO',362,0],
['Plus','CO',78,10],
['Grand','CO',2473,32],
['Elite','CO',2063,64],
['Medium','DE',203,0],
['Grand','DE',686,2],
['Elite','DE',826,0],
['Lite','KS',1738,110],
['Small','KS',12925,13],
['Medium','KS',15413,0],
['Small','GA',2166,2],
['Medium','GA',86,0],
['Plus','GA',348,3],
['Grand','GA',4244,18],
['Elite','GA',1536,1],
['Small','IA',351,0],
['Grand','IA',405,1],
['Small','IL',914,1],
['Medium','IL',127,0],
['Grand','IL',1470,7],
['Elite','IL',516,1],
['Lite','IN',43,0],
['Small','IN',667,1],
['Medium','IN',172,0],
['Plus','IN',149,1],
['Grand','IN',1380,5],
['Elite','IN',791,23],
['Small','FL',1,0],
['Grand','FL',1,0],
['Small','MD',1070,1],
['Grand','MD',1171,2],
['Elite','MD',33,0],
['Plus','TX',1,0],
['Small','MS',407,0],
['Medium','MS',3,0],
['Grand','MS',457,2],
['Elite','MS',20,0],
['Small','NC',557,0],
['Medium','NC',167,0],
['Plus','NC',95,1],
['Grand','NC',1090,5],
['Elite','NC',676,6],
['Lite','NM',1195,99],
['Small','NM',350,3],
['Medium','NM',212,0],
['Grand','NM',1509,8],
['Lite','NV',3899,389],
['Small','NV',147,0],
['Medium','NV',455,0],
['Plus','NV',1,1],
['Grand','NV',4100,16],
['Lite','OH',12,0],
['Small','OH',634,2],
['Medium','OH',749,0],
['Plus','OH',119,1],
['Grand','OH',3705,19],
['Elite','OH',3456,25],
['Small','PA',828,2],
['Medium','PA',288,0],
['Plus','PA',141,0],
['Grand','PA',2625,7],
['Elite','PA',1920,10],
['Small','SC',1146,2],
['Medium','SC',212,0],
['Plus','SC',223,4],
['Grand','SC',1803,6],
['Elite','SC',761,8],
['Small','TN',527,0],
['Medium','TN',90,0],
['Grand','TN',930,4],
['Elite','TN',395,1],
['Lite','ME',7232,58],
['Small','ME',1272,0],
['Medium','ME',1896,0],
['Plus','ME',1,0],
['Grand','ME',10782,33],
['Elite','ME',1911,3],
['Small','VA',495,0],
['Medium','VA',32,0],
['Plus','VA',7,0],
['Grand','VA',1557,12],
['Elite','VA',24,0],
['Small','WA',460,1],
['Plus','WA',88,3],
['Grand','WA',956,3],
['Small','WV',232,0],
['Medium','WV',71,0],
['Grand','WV',575,2],
['Elite','WV',368,3]
];
d3.select('svg').remove();
var color ={Elite:"#3366CC", Grand:"#DC3912", Lite:"#FF9900", Medium:"#109618", Plus:"#990099", Small:"#0099C6"};
var svg = d3.select("body").append("svg").attr("width", 960).attr("height", 800);
svg.append("text").attr("x",250).attr("y",70)
.attr("class","header").text("Sales Attempt");
svg.append("text").attr("x",750).attr("y",70)
.attr("class","header").text("Sales");
var g =[svg.append("g").attr("transform","translate(150,100)")
,svg.append("g").attr("transform","translate(650,100)")];
var bp=[ viz.bP()
.data(data)
.min(12)
.pad(1)
.height(600)
.width(200)
.barSize(35)
.fill(d=>color[d.primary])
,viz.bP()
.data(data)
.value(d=>d[3])
.min(12)
.pad(1)
.height(600)
.width(200)
.barSize(35)
.fill(d=>color[d.primary])
];
[0,1].forEach(function(i){
g[i].call(bp[i])
g[i].append("text").attr("x",-50).attr("y",-8).style("text-anchor","middle").text("Channel");
g[i].append("text").attr("x", 250).attr("y",-8).style("text-anchor","middle").text("State");
g[i].append("line").attr("x1",-100).attr("x2",0);
g[i].append("line").attr("x1",200).attr("x2",300);
g[i].append("line").attr("y1",610).attr("y2",610).attr("x1",-100).attr("x2",0);
g[i].append("line").attr("y1",610).attr("y2",610).attr("x1",200).attr("x2",300);
g[i].selectAll(".mainBars")
.on("mouseover",mouseover)
.on("mouseout",mouseout);
g[i].selectAll(".mainBars").append("text").attr("class","label")
.attr("x",d=>(d.part=="primary"? -30: 30))
.attr("y",d=>+6)
.text(d=>d.key)
.attr("text-anchor",d=>(d.part=="primary"? "end": "start"));
g[i].selectAll(".mainBars").append("text").attr("class","perc")
.attr("x",d=>(d.part=="primary"? -100: 80))
.attr("y",d=>+6)
.text(function(d){ return d3.format("0.0%")(d.percent)})
.attr("text-anchor",d=>(d.part=="primary"? "end": "start"));
});
function mouseover(d){
[0,1].forEach(function(i){
bp[i].mouseover(d);
g[i].selectAll(".mainBars").select(".perc")
.text(function(d){ return d3.format("0.0%")(d.percent)});
});
}
function mouseout(d){
[0,1].forEach(function(i){
bp[i].mouseout(d);
g[i].selectAll(".mainBars").select(".perc")
.text(function(d){ return d3.format("0.0%")(d.percent)});
});
}
d3.select(self.frameElement).style("height", "800px");
</script>
</body>
</html>
我正在尝试删除svg元素，然后在新数据到达时重新构建它。这是正确的做法吗？
答案 0 :(得分：1)
你有没有尝试过：
d3.selectAll('svg').remove();
有关d3.js中select vs selectAll的更多信息，请点击此链接： Why are d3's select() and selectAll() behaving differently here?