# Add to Cart

Spectrum will send SKUs, quantities, and other relevant data to the cart via the `spectrumAddToCart` function. This function should accept a single `payload` argument and use it to add items to the cart.

```javascript
window.spectrumAddToCart = function(payload) {
  // payload.recipeSetId: string
  // payload.items: array | null
  // payload.items[n]: object
  // payload.items[n].sku: string | null
  // payload.items[n].name: string | null
  // payload.items[n].quantity: number | null
  // payload.primaryThumbnailAngle: string | null
  // payload.thumbnailsByAngle: array | null
  // payload.thumbnailsByAngle[n].angleName: string
  // payload.thumbnailsByAngle[n].url: string
  // payload.options: object | null
  // payload.options[optionName]: string
}
```

The return value should be a `Promise`.


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