# it-peekable

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> Allows peeking/pushing an iterable

# About

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Lets you look at the contents of an async iterator and decide what to do

## Example

```javascript
import peekable from 'it-peekable'

// This can also be an iterator, generator, etc
const values = [0, 1, 2, 3, 4]

const it = peekable(value)

const first = it.peek()

console.info(first) // 0

it.push(first)

console.info([...it])
// [ 0, 1, 2, 3, 4 ]
```

Async sources must be awaited:

```javascript
import peekable from 'it-peekable'

const values = async function * () {
  yield * [0, 1, 2, 3, 4]
}

const it = peekable(values())

const first = await it.peek()

console.info(first) // 0

it.push(first)

console.info(await all(it))
// [ 0, 1, 2, 3, 4 ]
```

# Install

```console
$ npm i it-peekable
```

## Browser `<script>` tag

Loading this module through a script tag will make its exports available as `ItPeekable` in the global namespace.

```html
<script src="https://unpkg.com/it-peekable/dist/index.min.js"></script>
```

# API Docs

- <https://achingbrain.github.io/it/modules/it_peekable.html>

# License

Licensed under either of

- Apache 2.0, ([LICENSE-APACHE](https://github.com/achingbrain/it/blob/main/packages/it-peekable/LICENSE-APACHE) / <http://www.apache.org/licenses/LICENSE-2.0>)
- MIT ([LICENSE-MIT](https://github.com/achingbrain/it/blob/main/packages/it-peekable/LICENSE-MIT) / <http://opensource.org/licenses/MIT>)

# Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.