mahdi-shojaee commented on issue #19233:
URL: https://github.com/apache/echarts/issues/19233#issuecomment-1774132094
I encountered the same issue. The problem appears to be that the user agent
is not defined in Node.js. I used JSDOM to create a workaround that solved the
issue for me:
Important: You must call require("echarts") after defining the JSDOM props.
I only need server-rendered SVG images, not canvas images. An empty
`createCanvas` is sufficient for my needs. However, if you are using canvas,
you may need to use `node-canvas`.
```javascript
const { JSDOM } = require("jsdom");
const { window } = new JSDOM();
global.window = window;
global.document = window.document;
global.navigator = window.navigator;
global.navigator.userAgent = window.navigator.userAgent;
global.navigator.language = window.navigator.language;
const echarts = require("echarts");
echarts.setPlatformAPI({
createCanvas() {},
});
```
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