How to Use ChartJs or Chartjs-Node-Canvas in Pipedream?

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This topic was automatically generated from Slack. You can find the original thread here.

How do I use chartJs or chartjs-node-canvas In pipedream

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To use Chart.js or chartjs-node-canvas in Pipedream, you would typically follow these steps to create a custom Node.js code step that generates a chart image. However, it’s important to note that as of my last update, direct support for chartjs-node-canvas or generating images directly within Pipedream workflows using Chart.js might not be straightforward due to the limitations around file handling and the execution environment of Pipedream workflows. Nonetheless, you can use Chart.js within Pipedream for data manipulation and preparation for charting by following the general approach for using npm packages in Pipedream: 1. Import the necessary package at the top of your Node.js code step. 2. Use the package within the run method to manipulate your data or prepare it for charting. Here’s a basic example of how you might set up a code step with Chart.js, keeping in mind that generating and exporting the chart as an image directly might not be supported: ```
import { Chart } from ‘chart.js’; export default defineComponent({ async run({ steps, $ }) { // Example data const labels = [‘January’, ‘February’, ‘March’, ‘April’, ‘May’, ‘June’, ‘July’]; const data = { labels: labels, datasets: [{ label: ‘Demo Dataset’, backgroundColor: ‘rgb(255, 99, 132)’, borderColor: ‘rgb(255, 99, 132)’, data: [0, 10, 5, 2, 20, 30, 45], }] }; // Since direct image generation might not be supported, consider preparing your data here // and using another service to generate and host the chart image if needed. return data; // Returning data for demonstration purposes }, });

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Hi @U05FUC30Q01

Pls could this be correct? ChartJS isn’t supported? I get this error when I try to install

image.png
image.png704×334 38.8 KB

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How are you using it?
I’m not familiar with Chart.js but this works for me:

import { Chart } from "chart.js"

export default defineComponent({
  async run({ steps, $ }) {
    return steps.trigger.event
  },
})
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Thanks, let me try that

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I was trying with this

image.png