What do you think about a C# 6 like nameof() expression for

guest271314 guest271314 at gmail.com
Fri Jun 14 16:05:55 UTC 2019


Have not tried TypeScript. What are the use cases for JavaScript where
TypeScript is not used? Does ```nameof()``` check if an object has a
specific property name defined (```"MutationObserver" in window```;
```window.MutationObserver```; ```"document" in globalThis```)?

On Fri, Jun 14, 2019 at 1:05 PM Stas Berkov <stas.berkov at gmail.com> wrote:

> Can we revisit this issue?
>
>
> In C# there is `nameof`, in Swift you can do the same by calling
>
> ```
>
> let keyPath = \Person.mother.firstName
>
> NSPredicate(format: "%K == %@", keyPath, "Andrew")
>
> ```
>
> Let's introduce `nameof` in ES, please.
>
>
> Devs from TypeScript don't want to introduce this feature in TypeScript
> unless it is available in ES (
> https://github.com/microsoft/TypeScript/issues/1579 )
>
> This feature is eagarly being asked by TypeScript community.
>
>
> I understand there are couple issues related to `nameof` feature in ES.
> They are: minification and what to do if user already has `nameof` function.
>
>
> Minification.
>
> 1. If your code to be minimized be prepared that variable names will also
> change.
>
> 2. (just a possibility) Minimizer can have option to replace
> `nameof(someVar)` with result of `nameof` function.
>
>
>
> What if user already has `nameof` function.
>
> 1. To maintain status quo we can user `nameof` function having priority
> over newly introduced language feature.
>
> 2. OR we can use `typeof` syntax, e.g. `nameof msg.userName` (// returns
> "userName" string)
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