hd-utils/lib/utils/object/getObjectValueByPath.js

A handy utils for modern JS developers

/**
 * @description It takes a string, an object, and a navigation character, and returns the value of the object at the
 * string's path.
 * @example getObjectValueByPath({foo:{bar:"baz"}}, "foo.bar") // "baz"
 * @example getObjectValueByPath({b:{ f: [1, 2, 3]}}, 'b.f[2]') // 3
 * @returns The value of the key in the object.
 */
export default function getObjectValueByPath(obj, path, navigationChr = '.') {
    const segments = path.split(navigationChr);
    let current = obj;
    for (const segment of segments) {
        // Handling array indices in the path
        const arrayMatch = segment.match(/(\w+)\[(\d+)\]/);
        if (arrayMatch) {
            const [_, arrayKey, index] = arrayMatch;
            current = current[arrayKey];
            if (typeof current === 'undefined' || !Array.isArray(current)) {
                return null;
            }
            current = current[parseInt(index)];
        }
        else {
            current = current[segment];
        }
        if (typeof current === 'undefined') {
            return null;
        }
    }
    return current;
}