# Selectors

### Generate Reusable Selection Sets

In TypeScript Zeus can help make type-safe Zeus selection sets to reuse across queries.

```typescript
import { Selector, Chain } from './zeus';

const chain = Chain('https://faker.graphqleditor.com/a-team/olympus/graphql');

const cardSelector = Selector('Card')({
  name: true,
  description: true,
  Attack: true,
  skills: true,
  Defense: true,
  cardImage: {
    key: true,
    bucket: true,
  },
});

const queryWithSelectionSet = await chain('query')({
  drawCard: cardSelector,
});
```

### Inferring the response type

Sometimes you might want to infer the response type, for that it is best to use selectors:

```tsx
import { Selector, InputType, GraphQLTypes } from './zeus';

export const drawCardQuery = Selector("Query"){
  drawCard: {
    Attack: true,
    Children: true,
    id: true,
  },
});

type InferredResponseType = InputType<GraphQLTypes['Query'], typeof drawCardQuery>;
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guide.graphqleditor.com/tools/index/index/selector.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.