/TypeScript/Mixins with parameters typescript

Mixins with parameters typescript

// Utility types:

type GetProps<TBase> = TBase extends new (props: infer P) => any ? P : never
type GetInstance<TBase> = TBase extends new (...args: any[]) => infer I ? I : never
type MergeCtor<A, B> = new (props: GetProps<A> & GetProps<B>) => GetInstance<A> & GetInstance<B>


// Usage:
// bypass the restriction and manually type the signature
function GeometryMixin<TBase extends MixinBase>(Base: TBase) {
  // key 1: assert Base as any to mute the TS error
  const Derived = class Geometry extends (Base as any) {
    shape: 'rectangle' | 'triangle'
    constructor(props: { shape: 'rectangle' | 'triangle' }) {
      super(props)
      this.shape = props.shape
    }
  }

  // key 2: manually cast type to be MergeCtor
  return Derived as MergeCtor<typeof Derived, TBase>
}

Source: stackoverflow.com

Similar codes

6 votes179 views2 answers
How to print 4 digits after decimal in c++
TypeScript
3 votes184 views3 answers
How to get value from autocomplete material ui
TypeScript
0 vote197 views2 answers
Setstate do not update emidiatly
TypeScript
0 vote178 views2 answers
Mat datepicker timezone not correct
TypeScript
1 vote188 views1 answer
Get a span inside a div with div id javascript
TypeScript
0 vote217 views1 answer
Odata filter equal
TypeScript
13 votes188 views3 answers
Typescript integer
TypeScript
0 vote187 views1 answer
Check if an element exists laravel
TypeScript
0 vote191 views1 answer
How to make element increase in height as its innerHTML's height exapands
TypeScript
2 votes248 views3 answers
Java sort list by attribute
TypeScript