按照https://c3js.org/gettingstarted.html上的示例，我遇到了上述错误。我已经设置了php -S localhost:8000。然后我打开这个 .html 文件：
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="utf-8" />
<meta http-equiv="x-ua-compatible" content="ie=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>C3 Example</title>
<!-- Load c3.css -->
<link href="c3/c3.css" rel="stylesheet">
<!-- Load d3.js and c3.js -->
<script src="d3/d3.min.js" charset="utf-8"></script>
<script src="c3/c3.min.js"></script>
</head>
<body>
<div id="chart"></div>
<script type="text/javascript">
var chart = c3.generate({
bindto: '#chart',
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
['data2', 50, 20, 10, 40, 15, 25]
],
axes: {
data2: 'y2' …