object-hierarchy-access/built/exist.js

Get/Set value from/to JS object hierarchy properties

function exist(target, ...rest) {
    if (target === undefined || target === null) {
        return false;
    }
    const hierarchies = Array.prototype.concat.apply([], rest);
    let current = target;
    for (let i = 0; i < hierarchies.length; i++) {
        const prop = hierarchies[i];
        if (!current || !(prop in current)) {
            return false;
        }
        current = current[prop];
    }
    return true;
}
export { exist };