Flatten children recursively

flatten.js

const data = require("./data.json");

const clone = ({ children, ...obj }) => obj;

const flattenJson = obj =>
  obj
    .flatMap(el =>
      el.children ? [clone(el), ...flattenJson(el.children)] : [el]
    )

// interface ParsedData {
//   someFields: any
//   children: ParsedData[]
// }

const parsedData = JSON.parse(JSON.stringify(data));

//finalData: Array<Omit<ParsedData, 'children'>>

const finalDat = flattenJson(parsedData);

console.log(finalDat);