Setting the License

To remove the watermark displayed on the sankey chart, you will need to purchase the license and set it like below

import ApexSankey from 'apexsankey';

// set license key before creating any charts
ApexSankey.setLicense('your-license-key');

const sankey = new ApexSankey(document.getElementById('sankey-container'), options);
const graph = sankey.render(data);

You will receive your license key via email after purchasing a plan.