angular - 尝试使用 amcharts 重现有向图时出现错误:“找不到导出“默认”(导入为“am4plugins_forceDirected”)
问题描述
我正在尝试使用 angular 重现一个简单的 amcharts 有向图示例,但我遇到了一个似乎无法解决的错误。错误说“在'@amcharts/amcharts4/plugins/forceDirected'中找不到导出'默认'(导入为'am4plugins_forceDirected')。
我重新安装了 amcharts 并检查了有问题的文件,它似乎应该如此。无论如何,我用他们网站上的那个替换了整个 amcharts 文件夹,但并没有解决问题。
这是代码的样子:
import { Component, OnInit, NgZone } from "@angular/core";
import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";
import am4plugins_forceDirected from "@amcharts/amcharts4/plugins/forceDirected";
am4core.useTheme(am4themes_animated);
@Component({
selector: 'app-graph',
templateUrl: './graph.component.html',
styleUrls: ['./graph.component.css']
})
export class GraphComponent {
private chart: am4plugins_forceDirected.ForceDirectedTree;
constructor(private zone: NgZone) {}
ngAfterViewInit() {
this.zone.runOutsideAngular(() => {
let chart = am4core.create("chartdiv", am4plugins_forceDirected.ForceDirectedTree);
let networkSeries = chart.series.push(new am4plugins_forceDirected.ForceDirectedSeries());
chart.data = [
{
name: "Core",
children: [
{
name: "First",
children: [
{ name: "A1", value: 100 },
{ name: "A2", value: 60 }
]
},
{
name: "Second",
children: [
{ name: "B1", value: 135 },
{ name: "B2", value: 98 }
]
},
{
name: "Third",
children: [
{
name: "C1",
children: [
{ name: "EE1", value: 130 },
{ name: "EE2", value: 87 },
{ name: "EE3", value: 55 }
]
},
{ name: "C2", value: 148 },
{
name: "C3", children: [
{ name: "CC1", value: 53 },
{ name: "CC2", value: 30 }
]
},
{ name: "C4", value: 26 }
]
},
{
name: "Fourth",
children: [
{ name: "D1", value: 415 },
{ name: "D2", value: 148 },
{ name: "D3", value: 89 }
]
},
{
name: "Fifth",
children: [
{
name: "E1",
children: [
{ name: "EE1", value: 33 },
{ name: "EE2", value: 40 },
{ name: "EE3", value: 89 }
]
},
{
name: "E2",
value: 148
}
]
}
]
}
];
networkSeries.dataFields.value = "value";
networkSeries.dataFields.name = "name";
networkSeries.dataFields.children = "children";
networkSeries.nodes.template.tooltipText = "{name}:{value}";
networkSeries.nodes.template.fillOpacity = 1;
networkSeries.manyBodyStrength = -20;
networkSeries.links.template.strength = 0.8;
networkSeries.minRadius = am4core.percent(2);
networkSeries.nodes.template.label.text = "{name}"
networkSeries.fontSize = 10;
});
}
ngOnDestroy() {
this.zone.runOutsideAngular(() => {
if (this.chart) {
this.chart.dispose();
}
});
}
}
<div id="chartdiv" style="width: 100%; height: 500px"></div>
它应该显示一个简单的有向图,但我卡在使用有向图文件的地方。
解决方案
错误是由最后一个 import 语句引起的,应该是这样的: import * as am4plugins_forceDirected from "@amcharts/amcharts4/plugins/forceDirected"; 感谢 amcharts 团队 github 页面的 martynasma,我能够解决它!
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