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# Filter
`Filter` is a plugin that allows for filtering data that has been added
to the dropdown using a simple fuzzy string search of an input value.
## Usage
Add the `Filter` object to the plugins array of a `DropLab.prototype.init` or `DropLab.prototype.addHook` call.
- `Filter` requires a config value for `template`.
- `template` should be the key of the objects within your data array that you want to compare
to the user input string, for filtering.
```html
<input href="#" id="trigger" data-dropdown-trigger="#list">
<ul id="list" data-dropdown data-dynamic>
<li><a href="#" data-id="{{id}}">{{text}}</a></li>
<ul>
```
```js
const droplab = new DropLab();
const trigger = document.getElementById('trigger');
const list = document.getElementById('list');
droplab.init(trigger, list, [Filter], {
Filter: {
template: 'text',
},
});
droplab.addData('trigger', [{
id: 0,
text: 'Jacob',
}, {
id: 1,
text: 'Jeff',
}]);
```
Above, the input string will be compared against the `test` key of the passed data objects.
Optionally you can set `filterFunction` to a function. This function will be used instead
of `Filter`'s built in string search. `filterFunction` is passed 2 arguments, the first
is one of the data objects, the second is the current input value.
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