SigmaJS v2在HTML文档加载模块失败 求正确实现方案

错误原因 #

• 你安装的npm版sigma v2是面向现代前端构建工具的源码包，不能直接用requireJS加载未打包的源文件
• 项目页面放在node_modules目录下属于错误操作，项目业务文件需要和node_modules目录平级存放
• sigma v2的API和v1版本不兼容，你使用的new sigma()+s.graph.read()是v1的写法，v2已经不支持

最简可行方案（无需构建工具、无需requireJS） #

自行下载graphology和sigma的UMD格式打包文件到本地，跳过npm安装和模块加载器配置，修改后的完整代码如下：

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Sigma Demo</title>
  <style>
    html, body { height: 100%; margin: 0; }
    #sigma-container { width: 100%; height: 100%; }
  </style>
  <!-- 引入本地存放的graphology和sigma UMD包 -->
  <script src="./graphology.umd.min.js"></script>
  <script src="./sigma.min.js"></script>
</head>
<body>
  <div id="sigma-container"></div>
  <script>
    // 初始化graph实例
    const graph = new graphology.Graph();
    
    // 导入你的节点和边数据
    const data = {
      nodes: [
        { id: "n0", label: "node 1", x: 0, y: 0, size: 3, color: '#00BCD4' },
        { id: "n1", label: "node 2", x: 3, y: 1, size: 2, color: '#00BCD4' },
        { id: "n2", label: "node 3", x: 1, y: 3, size: 1, color: '#00BCD4' },
        { id: "n3", label: "node 4", x: 6, y: 0, size: 3, color: '#00BCD4' },
        { id: "n4", label: "node 5", x: 5, y: 1, size: 2, color: '#00BCD4' },
        { id: "n5", label: "node 6", x: 4, y: 3, size: 1, color: '#00BCD4' }
      ],
      edges: [
        { id: "e0", source: "n0", target: "n1",  color: '#545454', type:'line'},
        { id: "e1", source: "n1", target: "n2", color: '#545454', type:'line'},
        { id: "e2", source: "n1", target: "n3", color: '#545454', type:'line'},
        { id: "e3", source: "n1", target: "n4", color: '#545454', type:'line'},
        { id: "e4", source: "n2", target: "n0", color: '#545454', type:'line'},
        { id: "e5", source: "n2", target: "n3", color: '#545454', type:'line'},
        { id: "e6", source: "n3", target: "n2",  color: '#545454', type:'line'},
        { id: "e7", source: "n4", target: "n5", color: '#545454', type:'line'},
        { id: "e8", source: "n4", target: "n3", color: '#545454', type:'line'},
        { id: "e9", source: "n5", target: "n0", color: '#545454', type:'line'}
      ]
    };
    graph.import(data);

    // 初始化sigma实例
    const renderer = new Sigma(graph, document.getElementById("sigma-container"), {
      labelColor: 'node',
      minEdgeSize: 0.1,
      maxEdgeSize: 2,
      minNodeSize: 5,
      maxNodeSize: 5
    });
  </script>
</body>
</html>

直接在本地打开该html文件即可正常运行。

如需使用npm包配合构建工具的操作步骤 #

• 在项目根目录（和node_modules平级）执行npm install vite -D安装轻量化构建工具
• 根目录新建index.html，引入入口js文件：<script type="module" src="./index.js"></script>
• 根目录新建index.js，写入sigma初始化逻辑（用ESM语法导入graphology和sigma即可）
• 在package.json的scripts字段添加命令："dev": "vite"
• 执行npm run dev启动本地服务后访问即可

内容的提问来源于stack exchange，提问作者xxestter