Ways to expand the inheritance of a family's assets in the next generation

I am facing an issue with the following code snippet:

class Table {
    get pagination () {
        return {
            get item () {
                return {
                    log (s : string) {
                        console.log(s);
                    }
                }
            }
        }
    }
}
class TableWithFirst extends Table {
    get pagination () {
        return {
            ...super.pagination,
            get first () {
                this.item.log("first");
                return "first";
            }
        }
    }
}
const t = new TableWithFirst();
t.pagination.first

After running the code, I encountered the error message:

[ERR]: "Executed JavaScript Failed:" 
[ERR]: Cannot read properties of undefined (reading 'log') 

What is the best way to include the first getter in the pagination section without errors? Do I need to refactor the logic into a separate class?

Answer №1

If your project does not require compatibility with older browsers, consider updating the compilation target to ES2018 or above so that spread syntax is not transpiled unnecessarily.

Code Playground


Concerning TestCafe, you can learn how to customize TypeScript compiler options used by its runner here. It will not automatically pick up the standard tsconfig file.

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