第一步:下载npm包

npm install mxgraph --save
第二步:新建一个index.js文件
文件内容如下
import mx from 'mxgraph';
const mxgraph = mx({
mxImageBasePath: './src/images',
mxBasePath: './src'
});
// decode bug https://github.com/jgraph/mxgraph/issues/49
window.mxGraph = mxgraph.mxGraph;
window.mxGraphModel = mxgraph.mxGraphModel;
window.mxEditor = mxgraph.mxEditor;
window.mxGeometry = mxgraph.mxGeometry;
window.mxDefaultKeyHandler = mxgraph.mxDefaultKeyHandler;
window.mxDefaultPopupMenu = mxgraph.mxDefaultPopupMenu;
window.mxStylesheet = mxgraph.mxStylesheet;
window.mxDefaultToolbar = mxgraph.mxDefaultToolbar;
export default mxgraph;