polotno-node

Polotno-node

NodeJS package to work with Polotno Framework.

Usage

npm install polotno-node

const fs = require('fs');
const { createInstance } = require('polotno-node');

async function run() {
  // create working instance
  const instance = await createInstance({
    // this is a demo key just for that project
    // (!) please don't use it in your projects
    // to create your own API key please go here: https://polotno.dev/cabinet
    key: 'nFA5H9elEytDyPyvKL7T',
  });

  // load sample json
  const json = JSON.parse(fs.readFileSync('polotno.json'));

  const imageBase64 = await instance.jsonToImageBase64(json);
  fs.writeFileSync('out.png', imageBase64, 'base64');

  // close instance
  instance.close();
}

run();

API

instance.run()

Run any Polotno store API directly inside web-page context

// we can't directly use "json" variable inside the run function
// we MUST pass it as the second argument
const url = await instance.run(async (json) => {
  store.loadJSON(json);
  await store.waitLoading();
  return store.toDataURL();
}, json);

instance.jsonToImageBase64(json)

Export json into base64 string of image.

const json = JSON.parse(fs.readFileSync('polotno.json'));

const imageBase64 = await instance.jsonToImageBase64(json);
fs.writeFileSync('out.png', imageBase64, 'base64');

instance.jsonToPDFBase64(json)

Export json into base64 string of pdf file.

const json = JSON.parse(fs.readFileSync('polotno.json'));

const pdfBase64 = await instance.jsonToPDFBase64(json);
fs.writeFileSync('out.pdf', pdfBase64, 'base64');