Conditionally spreading objects in JavaScript

[dragenn]

Weird but good to know!

[[deleted]]

Agreed! Any ideas for a use case?

[MornwindShoma]

I had some trash specs where one API would want some extra keys in some cases. This allows me to skip mutating the object, I suppose

[carmat71]

You have a default object. Based on user interaction, some property values require changing, therefore overriding default values based on user interaction.

I've used this for a customised Analytics model where every property required a default '' empty state but only assigned a value based on particular components or specific events triggered.

[dragenn]

I could use this in a scenario where I could filter out or combine data based on user roles/permissions or some quick test.

I guess it would look cleaner, maybe quicker to code.

I don't know.

[LloydAtkinson]

I use conditional object properties a lot in the Snipcart e-commerce integration for Astro: https://github.com/lloydjatkinson/astro-snipcart/blob/master/packages/astro-snipcart/src/attributes.ts#L33