Aurelia CLI encounters difficulty importing chart.js when using TypeScript

Currently, I am utilizing typescript with aurelia/aurelia-cli. After npm installing chart.js, I proceeded to add it to my aurelia.json file like so:

"dependencies": [
      ...
      {
        "name": "chartjs",
        "path": "../node_modules/chart.js/dist",
        "main": "Chart"
      },
]

Additionally, typings were executed using the following command:

typings install dt~chart.js --global --save

My current hurdle involves attempting to import it in one of my components:

import * as Chart from 'chartjs'

However, this action triggers the error message:

Cannot find module 'chartjs'.

I have also experimented with these variations:

... from 'chart'
... from 'Chart'
... from 'Chart.js'
... from 'chartjs'
import * as chart ...
import * as chartjs ...
typescriptaurelia

Answer №1

One thing you could try is declaring an empty module in a declaration file, such as index.d.ts. Here's an example:

declare module "chart.js";

This can be a helpful starting point for importing 3rd party libraries. More information on this topic can be found at this link.

If there are no errors and you are able to use the basic JavaScript functions from chart.js, it indicates that the library has been included but the types have not.

In case you are using Typescript 2.0, make sure to install the types like so:

npm install --save @types/chartjs

Answer №2

After some adjustments to my import and aurelia.json configuration file, I successfully got it working.

Here is the content of my aurelia.json file:

{
    "name": "chartjs",
    "path": "../node_modules/chart.js/dist/Chart.min"
},

And here's the updated import statement:

import 'chartjs';

Answer №3

I have firsthand experience with integrating Chart.js into Aurelia, as we successfully implemented it in a demo app during our training sessions. In the demo application, it was incorporated using the following import statement: import Chart from 'chartjs';. However, it's important to note that this import method is based on ES2015 rather than TypeScript.

Furthermore, the configuration settings should be structured similarly to the following snippet in the aurelia.json file:

      {
        "name": "chartjs",
        "path": "../node_modules/chart.js/Chart.min",
        "exports": "Chart"
      }

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