What's the best way to delete an object property in JavaScript?

[amelial]

I have a JavaScript object that looks like this:

let userConfig = {
  "username": "john_doe",
  "email": "[email protected]",
  "tempPassword": "abc123"
};

I need to remove the tempPassword field from this object so it becomes:

let userConfig = {
  "username": "john_doe",
  "email": "[email protected]"
};

I’m working on a user registration system and need to clean up temporary data before storing the final user object. What are the different methods I can use to accomplish this? I want to make sure I’m doing it the right way and not leaving any traces of the removed property.

[Tom_89Paint]

The delete operator works well, but I check if the property exists first to avoid issues in bigger apps. Use if ('tempPassword' in userConfig) delete userConfig.tempPassword to be safe. Another approach that’s worked for me is Object.assign() with destructuring: const cleanConfig = Object.assign({}, userConfig); delete cleanConfig.tempPassword. This creates a clean copy and leaves the original untouched. When dealing with sensitive stuff like passwords in production, I verify deletion worked by logging Object.hasOwnProperty.call(userConfig, 'tempPassword') - should return false after removal.

[liamj]

There are a couple of effective methods to remove a property from a JavaScript object. The most straightforward approach is using the delete operator, like this: delete userConfig.tempPassword, which removes the property directly from the original object. Alternatively, if you prefer to avoid modifying the original object, destructuring is a useful technique: const { tempPassword, ...cleanConfig } = userConfig. This creates a new object without the tempPassword field, preserving immutability. Both methods are valid, but destructuring aligns better with functional programming principles.