js2flowchart/src/shared/utils/flatten.js

> Why? While I've been working on [Under-the-hood-ReactJS](https://github.com/Bogdan-Lyashenko/Under-the-hood-ReactJS) I spent enormous amount of time on creating schemes. Each change in code or flowchart affects all entire scheme instantly, forcing you t

export const flatTree = (tree, getBody = node => node.body) => {
    let flatList = [];

    [].concat(tree).forEach(node => {
        const body = getBody(node);

        if (body && body.length) {
            flatList = flatList.concat(node, flatTree(body, getBody));
        } else {
            flatList.push(node);
        }
    });

    return flatList;
};