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# `contains()`
The contains method determines whether the collection contains a given item:
```js
const collection = collect({
name: 'Mohamed Salah',
number: 11,
});
collection.contains('name');
// true
collection.contains('age');
// false
collection.contains('Mohamed Salah');
// true
```
You may also work with arrays
```js
const collection = collect([1, 2, 3]);
collection.contains(3);
// true
```
You may also pass a key / value pair to the contains method, which will determine if the given pair exists in the collection:
```js
const collection = collect({
name: 'Mohamed Salah',
number: 11,
});
collection.contains('name', 'Steve Jobs');
// false
```
Finally, you may also pass a callback to the contains method to perform your own truth test:
```js
const collection = collect([1, 2, 3, 4, 5]);
collection.contains((value, key) => value > 5);
// false
```
[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/contains.js)