> ## Documentation Index
> Fetch the complete documentation index at: https://waterfall.supafetch.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Options

> Passing in options to getHtml() function.

# Options

The `getHtml` function accepts an optional `options` object as its second parameter. This object allows you to customize the behavior of Waterfall-Fetch.

```typescript theme={null}
const result = await getHtml("https://example.com", options);
```

## Options Object

Options is an optional parameter you can pass, you can define:

* `set` The set of strategies that will be used, order sensitive,
* `evalFunction`

```typescript theme={null}
type Options = {
	set: "cheap" | "js" | null;
	evalFunction?: OnPageEvaluationFunction;
};
```

### Properties

<ParamField body="set" type="string">
  Specifies the strategy set to use. Can be "cheap", "js", or null (default).
</ParamField>

<ParamField body="evalFunction" type="function">
  A custom evaluation function to be executed in the context of the page (only applicable when using Puppeteer).
</ParamField>

## Usage Example

```javascript theme={null}
import getHtml from "waterfall-fetch";

const url = "https://example.com";

const options = {
	set: "js",
	evalFunction: async (page) => {
		return await page.evaluate(() => document.title);
	},
};

const result = await getHtml(url, options);
```

For more information on using custom evaluation functions, see the [Evaluation Functions](/mdx/advanced/evaluation-functions) guide.