Questions tagged [class-expression]
4 questions
2
votes
1 answer
Generic class expression broken if duplicate constructor is removed
I stumbled upon this weird behaviour,
If I remove one of the constructor signatures in IFoo the compiler triggers the following error : Type 'typeof (Anonymous class)' is not assignable to type 'IFoo'.
What is actually happening ?
type Foo = {
…
Matthieu Riegler
- 31,918
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2
votes
2 answers
When we should use class expression in Javascript?
I have recently got to know that we do have class expressions too like function expressions in JS. I know some points about it(MDN) like:
Class expressions may omit the class name ("binding identifier"), which is not possible with class…
Apoorva Chikara
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0
votes
1 answer
How do you subclass a generic Class expression with constructor overload
Angular's FormControl is defined as class expression with constructor overload in an interface. This is due to a typescript limitation.
I was able to narrow the code down to :
export interface FormControl {
setValue(value:…
Matthieu Riegler
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- 134
-1
votes
0 answers
JS / TS - Add decorators to ES6 class expressions
I have a class expression (see MDN - Class Expressions) like this:
const XYZ = class {}
I want to add a decorator like we have in regular classes (see TS Class Decorator) to that, how can I do this?
Adding them before or inline throws an error
