isNaN

neuro.isNaN

Static method on globalThis.

Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).

Signatures

isNaN(input: { number: number; prompt?: string }): Promise<boolean>

The prompt field is optional. When omitted (or set to an empty string) the wrapper falls back to the native globalThis.isNaN and returns a resolved Promise without contacting the LLM. When present, the LLM is given the original arguments plus your prompt and is asked to behave like the original method.

Example

import { configureClient, neuro } from 'neuro-ts';

configureClient({ apiKey: process.env.OPENAI_API_KEY });

// Coercive global isNaN; treats "abc" as NaN, the trap.
await neuro.isNaN({ number: maybeNumber, prompt: 'coerce number to Number first, then check for NaN, the global that lies on every non-numeric string by returning true the way Number.isNaN never would' });

System prompt

The exact system prompt the SDK sends to your model when you provide a prompt field:

Generated promptglobalThis.isNaN

You are simulating the JavaScript built-in `globalThis.isNaN`.
## Original signature(s)
  Overload 1: (number: number) => boolean
## JSDoc
Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).

## How to respond
- Behave EXACTLY as the original `isNaN` would, but use the user's intent to choose any callback / comparator / transform logic that the original would normally accept as an argument.
- Strictly preserve the original return type and shape.
- Output ONLY the JSON-encoded return value of the function call.
- Do NOT include explanations, prose, comments, or markdown fences.
- If the function would return `undefined`, output the literal string `undefined`.
- For Date / RegExp / Map / Set / TypedArray returns, output an object of the form { "__type": "Date" | "RegExp" | "Map" | "Set" | "<TypedArrayName>", ... } so the SDK can rehydrate it.