Error: Cannot find module 'canvas' - Chart.js

Discussão em 'Angular' iniciado por Mosky, Abril 11, 2025.

  1. Mosky

    Mosky Guest

    I'm using chartjs-node-canvas with chartjs to render a graph config as an image, so after installing it I tried the following :

    import { ChartJSNodeCanvas } from 'chartjs-node-canvas';
    const chartCallback = (ChartJS) => {
    ChartJS.defaults.global.elements.rectangle.borderWidth = 2;
    };
    const canvasRenderService = new ChartJSNodeCanvas({
    width,
    height,
    chartCallback,
    });


    But I get the following error when I'm creating a new ChartJSNodeCanvas :

    Error: Cannot find module 'canvas'
    at Function.webpackEmptyContext [as resolve] (http://localhost:4200/main.js:131373:10)
    at freshRequire (http://localhost:4200/main.js:21530:69)
    at new ChartJSNodeCanvas (http://localhost:4200/main.js:21592:50)
    at ChartImageService._callee2$ (http://localhost:4200/main.js:127066:39)
    at tryCatch (http://localhost:4200/main.js:115133:17)
    at Generator.invoke [as _invoke] (http://localhost:4200/main.js:115347:22)
    at Generator.next (http://localhost:4200/main.js:115185:21)
    at http://localhost:4200/main.js:127002:67
    at new ZoneAwarePromise (http://localhost:4200/polyfills.js:7278:21)
    at __awaiter (http://localhost:4200/main.js:126981:10) {code: 'MODULE_NOT_FOUND', stack: 'Error: Cannot find module 'canvas'
    at Fun…ter (http://localhost:4200/main.js:126981:10)', message: 'Cannot find module 'canvas''}


    I tried to npm install again, npm rebuild, delete package-lock.json... but it doesn't work. Any ideas ?

    I'm using Angular with Electronjs

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