Runtime error for two classes in one ts file.

[vitaliy-leschenko]

TypeScript Version:

1.8.10

Code

export class BaseLayoutModel extends BaseModel {
    constructor(attributes?: any, options?: any) {
        super(attributes, options);
    }
}

export class BaseModel extends Backbone.Model {
    constructor(attributes?: any, options?: any) {
        super(attributes, options);
    }

    destroy(options?: Backbone.ModelDestroyOptions): any {
        const opts = _.extend({
            contentType: "application/json",
            dataType: "text"
        }, options || {});
        super.destroy(opts);
    }
}

Expected behavior:

Actual behavior:
Runtime error. BaseModel is undefined

[zpdDG4gta8XKpMCd]

in your code BaseModel is declared lexically after BaseLayoutModel

in the compiled code it means that BaseModel is used before being initialized

try swapping the declarations (BaseModel class should come first)

[vitaliy-leschenko]

I know about “why it failed”. But this code translated to JS without any errors.

[Arnavion]

Duplicate of #4341 and #5207 which should be fixed by #4343