How Can I Optimally Rename Keys in JavaScript Objects?

Optimizing Key Renaming in JavaScript Objects

When working with JavaScript objects, there may be situations where you need to update the name of a key. A common approach is to follow these non-optimized steps:

o[new_key] = o[old_key];
delete o[old_key];

However, this method doesn't completely preserve the behavior of the original key. For optimal key renaming, consider the following approach:

if (old_key !== new_key) {
    Object.defineProperty(o, new_key,
        Object.getOwnPropertyDescriptor(o, old_key));
    delete o[old_key];
}

This approach ensures that the renamed property behaves identically to the old key, preserving descriptors such as its configurability, writability, enumerability, and getter/setter functionality.

The above is the detailed content of How Can I Optimally Rename Keys in JavaScript Objects?. For more information, please follow other related articles on the PHP Chinese website!