---
name: "up.Params"
area: "API"
kind: "Class constructor"
parent: "up.Params class"
url: "https://unpoly.com/api/up.Params.new"
---
<nav aria-label="Unpoly docs">[All docs](https://unpoly.com/index.md) · [up.Params class](https://unpoly.com/api/up.Params.md)</nav>

# new up.Params([params])

Constructs a new [`up.Params`](https://unpoly.com/api/up.Params.md) instance.

---

## Parameters {#parameters}

### [params] {#params}

(optional)

An existing list of params with which to initialize the new [`up.Params`](https://unpoly.com/api/up.Params.md) object.

The given params value may be of any [supported type](https://unpoly.com/api/up.Params.md).

Type: [Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects) | [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array) | string | [FormData](https://developer.mozilla.org/en-US/docs/Web/API/FormData) | [up.Params](https://unpoly.com/api/up.Params.md)

---

## Return value {#return-value}

Type: [up.Params](https://unpoly.com/api/up.Params.md)