@d3fc/d3fc-element/src/data.js

Custom HTML elements that make it easier to create responsive visualisations that integrate easily with other UI frameworks (e.g. React, Angular)

const key = '__d3fc-elements__';

export const get = (element) => element[key] || {};

export const set = (element, data) => void (element[key] = data);

export const clear = (element) => delete element[key];