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/src/a.js(10,7): error TS2417: Class static side 'typeof ElementsArray' incorrectly extends base class static side '{ isArray(arg: any): arg is any[]; readonly prototype: any[]; }'.
Types of property 'isArray' are incompatible.
Type '(arg: any) => boolean' is not assignable to type '(arg: any) => arg is any[]'.
Signature '(arg: any): boolean' must be a type predicate.
==== /src/a.js (1 errors) ====
class Thing {
static {
this.doSomething = () => {};
}
}
Thing.doSomething();
// GH#46468
class ElementsArray extends Array {
~~~~~~~~~~~~~
!!! error TS2417: Class static side 'typeof ElementsArray' incorrectly extends base class static side '{ isArray(arg: any): arg is any[]; readonly prototype: any[]; }'.
!!! error TS2417: Types of property 'isArray' are incompatible.
!!! error TS2417: Type '(arg: any) => boolean' is not assignable to type '(arg: any) => arg is any[]'.
!!! error TS2417: Signature '(arg: any): boolean' must be a type predicate.
static {
const superisArray = super.isArray;
const customIsArray = (arg)=> superisArray(arg);
this.isArray = customIsArray;
}
}
ElementsArray.isArray(new ElementsArray());
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