Retrieve resources from a pre-built npm package on-the-fly

Question

Retrieve resources from a pre-built npm package on-the-fly

Question regarding the creation of npm packages and the ability to dynamically request resources from one package in another.

Imagine I have a collection of images in package A, along with JavaScript logic to fetch them:

// Inside package B
import Component from 'pkg-a'

Component.getImage('foo')

I build this using vite/webpack and then use package B, which has package A listed in its dependencies in 'package.json'

Typically, the build tool will only include the specified images directly into the /dist folder of package A

However, my goal is to:

Have all images in the /dist folder - this can be achieved by using the /public folder;
Enable package A to accept arguments specifying an image name and return the correct image dynamically from its dist folder - unsure if this is feasible;

Is it possible to request just one image from package A, or do I need to encode all images in BASE64 format inside .es.js files (which increases file size by 30%) within package A?

javascript npm build dependencies vite

Answer 1

Answer №1

To achieve the desired result, I would implement the following steps. While I am not entirely certain about how it can be accomplished with vite (specifically for step 2), I will detail my approach using webpack. The overarching concept, however, remains applicable in both scenarios.

Within package A, I would establish a function (likely within the main index.js) that accepts the image name as a parameter and returns the corresponding image path. This function leverages dynamic imports.
```
export function getImage(name) {
   return import(`./images/${name}.png`);
}
```

Subsequently, I would configure webpack within package A to copy the images to the dist directory.

// webpack.config.js for package A
const CopyWebpackPlugin = require('copy-webpack-plugin');
module.exports = {
  // Other configurations ...
  plugins: [
    new CopyWebpackPlugin([
      { from: 'src/images', to: 'images' },
    ]),
 ],
};

Finally, in package B, I would import the getImage function from package A and utilize it to retrieve the image (a simplified example that can be tailored to suit your framework or requirements).


import { getImage } from 'pkgA';

async function loadComponent() {
  const imgSrc = await getImage('myRequiredImg');
  const img = new Image();
  img.src = imgSrc.default;
  document.body.appendChild(img);
}

loadComponent();

Answer 2

To achieve the desired result, I would implement the following steps. While I am not entirely certain about how it can be accomplished with vite (specifically for step 2), I will detail my approach using webpack. The overarching concept, however, remains applicable in both scenarios.

Within package A, I would establish a function (likely within the main index.js) that accepts the image name as a parameter and returns the corresponding image path. This function leverages dynamic imports.
```
export function getImage(name) {
   return import(`./images/${name}.png`);
}
```

Subsequently, I would configure webpack within package A to copy the images to the dist directory.

// webpack.config.js for package A
const CopyWebpackPlugin = require('copy-webpack-plugin');
module.exports = {
  // Other configurations ...
  plugins: [
    new CopyWebpackPlugin([
      { from: 'src/images', to: 'images' },
    ]),
 ],
};

Finally, in package B, I would import the getImage function from package A and utilize it to retrieve the image (a simplified example that can be tailored to suit your framework or requirements).


import { getImage } from 'pkgA';

async function loadComponent() {
  const imgSrc = await getImage('myRequiredImg');
  const img = new Image();
  img.src = imgSrc.default;
  document.body.appendChild(img);
}

loadComponent();

Retrieve resources from a pre-built npm package on-the-fly

Answer №1

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