Combining Rollup, Typescript, and converting images to base64 during the loading process

Having trouble preloading an image with Rollup. None of the solutions that should work seem to be effective, and I can't figure out why. Has anyone successfully managed to make this work? Here is my configuration in rollup.config.js:

import image from 'rollup-plugin-image'
...
plugins: [
        image(),
        json(),
        resolve(),
        commonjs(),
        typescript({
            typescript: require('typescript'),
        }),
        (process.env.BUILD === 'production' ? terser() : {})

This is what I have in my source:

import CAR_IMAGE from "../resources/expand.png";

But I keep getting an error from the rtp2 plugin which reads:

Semantic error TS 2307, cannot find a module "../resources/expand.png"

What's strange is that I encounter the same issue with different image-loading plugins for Rollup. The path is correct, the image is there. This error is driving me crazy =((

Update: I have created a repository to reproduce this bug:

https://github.com/AntonPilyak/rollup-image-bug

Update 2: I have reported these bugs:

https://github.com/rollup/rollup-plugin-url/issues/22

https://github.com/alwaysonlinetxm/rollup-plugin-img/issues/5

https://github.com/rollup/rollup-plugin-image/issues/10

Why is it so frustratingly difficult? =(((

typescriptrolluprollupjs

Answer №1

To update your rollup configuration file, replace the rollup-plugin-image package with this package. Then, include the following code snippet in the plugins section:

plugins: [
image({
  extensions: /\.(png|jpg|jpeg|gif|svg)$/,
  limit: 10000
}),........

After making these changes, create a file named declaration.d.ts in the root of your project and add the following snippet:

declare module '*.png' {
    const value: any;
    export default value;
}

Don't forget to include the declaration file in your tsconfig.json:

"include": ["src","src/declaration.d.ts"],

Finally, re-run rollup in CLI and everything should work smoothly!👍

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