Function crawlLayout

dash/dash-renderer/src/actions/utils.js:40–169

(
    object,
    func,
    currentPath = [],
    extraPath = undefined
)

// crawl a layout object or children array, apply a function on every object
export const crawlLayout = (
    object,
    func,
    currentPath = [],
    extraPath = undefined
) => {
    if (Array.isArray(object)) {
        // children array
        object.forEach((child, i) => {
            if (extraPath) {
                const objOf = findIndex(p => includes('{}', p), extraPath);
                if (objOf !== -1) {
                    const front = slice(0, objOf, extraPath);
                    const back = slice(objOf, extraPath.length, extraPath);
                    if (front.length) {
                        crawlLayout(
                            path(front, child),
                            func,
                            concat(currentPath, concat([i], front)),
                            back
                        );
                    } else {
                        const backPath = back
                            .map(p => p.replace('{}', ''))
                            .filter(e => e);
                        let childObj,
                            childPath = concat([i], backPath);
                        if (backPath.length) {
                            childObj = path(backPath, child);
                        } else {
                            childObj = child;
                        }
                        for (const key in childObj) {
                            const value = childObj[key];
                            crawlLayout(
                                value,
                                func,
                                concat(currentPath, childPath.concat([key]))
                            );
                        }
                    }
                } else {
                    crawlLayout(
                        path(extraPath, child),
                        func,
                        concat(currentPath, concat([i], extraPath))
                    );
                }
            } else {
                crawlLayout(child, func, append(i, currentPath));
            }
        });
    } else if (type(object) === 'Object') {
        func(object, currentPath);

        const children = path(propsChildren, object);
        if (children) {
            const newPath = concat(currentPath, propsChildren);