magento2-api-wrapper/esm/util/flatten.js

Minimal Magento 2 API library. Both node and browser compatible

/**
 * Flattens object/array to an object which keys are nested using square brackets
 */
export function flatten(data) {
    const flatten = flattenToArray(data);
    return Object.fromEntries(flatten.map((v) => [
        Array.isArray(v[0])
            ? (v[0].shift() + (v[0].map((p) => `[${p}]`)).join(""))
            : v[0],
        v[1],
    ]));
}
function flattenToArray(data) {
    const flat = [];
    for (const name in data) {
        const value = data[name];
        // copy non nested values
        if (typeof value !== "object") {
            flat.push([name, value]);
            continue;
        }
        const flatValues = flattenToArray(value)
            .map((v) => {
            return [
                Array.isArray(v[0]) ? [name, ...v[0]] : [name, v[0]],
                v[1],
            ];
        });
        flat.push(...flatValues);
    }
    return flat;
}