@nicksrandall/react-hotkeys-hook
v4.0.3
Published
<hr> <div align="center"> <h1 align="center"> useHotkeys(keys, callback) </h1> </div>
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Quick Start
The easiest way to use the hook.
import { useHotkeys } from 'react-hotkeys-hook'
export const ExampleComponent = () => {
const [count, setCount] = useState(0)
useHotkeys('ctrl+k', () => setCount(count + 1), [count])
return (
<p>
Pressed {count} times.
</p>
)
}
Scopes
Scopes allow you to group hotkeys together. You can use scopes to prevent hotkeys from colliding with each other.
const App = () => {
return (
<HotkeysProvider initiallyActiveScopes={['settings']}>
<ExampleComponent />
</HotkeysProvider>
)
}
export const ExampleComponent = () => {
const [count, setCount] = useState(0)
useHotkeys('ctrl+k', () => setCount(prevCount => prevCount + 1), { scopes: ['settings'] })
return (
<p>
Pressed {count} times.
</p>
)
}
Changing a scope's active state
You can change the active state of a scope using the deactivateScope
, activateScope
and toggleScope
functions
returned by the useHotkeysContext()
hook. Note that you have to have your app wrapped in a <HotkeysProvider>
component.
const App = () => {
return (
<HotkeysProvider initiallyActiveScopes={['settings']}>
<ExampleComponent />
</HotkeysProvider>
)
}
export const ExampleComponent = () => {
const { toggleScope } = useHotkeysContext()
return (
<button onClick={() => toggleScope('settings')}>
Change scope active state
</button>
)
}
Focus trap
This will only trigger the hotkey if the component is focused.
export const ExampleComponent = () => {
const [count, setCount] = useState(0)
const ref = useHotkeys<HTMLParagraphElement>('ctrl+k', () => setCount(prevCount => prevCount + 1))
return (
<p tabIndex={-1} ref={ref}>
Pressed {count} times.
</p>
)
}
Documentation & Live Examples
API
useHotkeys(keys, callback)
useHotkeys(keys: string | string[], callback: (event: KeyboardEvent, handler: HotkeysEvent) => void, options: Options = {}, deps: DependencyList = [])
| Parameter | Type | Required? | Default value | Description |
|---------------|---------------------------------------------------------|-----------|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| keys
| string
or string[]
| required | - | set the hotkeys you want the hook to listen to. You can use single or multiple keys, modifier combinations, etc. This will either be a string or an array of strings. To separate multiple keys, use a colon. This split key value can be overridden with the splitKey
option. |
| callback
| (event: KeyboardEvent, handler: HotkeysEvent) => void
| required | - | This is the callback function that will be called when the hotkey is pressed. The callback will receive the browsers native KeyboardEvent
and the libraries HotkeysEvent
. |
| options
| Options
| optional | {}
| Object to modify the behavior of the hook. Default options are given below. |
| dependencies
| DependencyList
| optional | []
| The given callback will always be memoised inside the hook. So if you reference any outside variables, you need to set them here for the callback to get updated (Much like useCallback
works in React). |
Options
All options are optional and have a default value which you can override to change the behavior of the hook.
| Option | Type | Default value | Description |
|--------------------------|--------------------------------------------------------------------------------------|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| enabled
| boolean
or (keyboardEvent: KeyboardEvent, hotkeysEvent: HotkeysEvent) => boolean
| true
| This option determines whether the hotkey is active or not. It can take a boolean (for example a flag from a state outside) or a function which gets executed once the hotkey is pressed. If the function returns false
the hotkey won't get executed and all browser events are prevented. |
| enableOnFormTags
| boolean
or FormTags[]
| false
| By default hotkeys are not registered if a focus focuses on an input field. This will prevent accidental triggering of hotkeys when the user is typing. If you want to enable hotkeys, use this option. Setting it to true will enable on all form tags, otherwise you can give an array of form tags to enable the hotkey on (possible options are: ['input', 'textarea', 'select']
) |
| enableOnContentEditable
| boolean
| false
| Set this option to enable hotkeys on tags that have set the contentEditable
prop to true
|
| combinationKey
| string
| +
| Character to indicate keystrokes like shift+c
. You might want to change this if you want to listen to the +
character like ctrl-+
. |
| splitKey
| string
| ,
| Character to separate different keystrokes like ctrl+a, ctrl+b
. |
| scopes
| string
or string[]
| *
| With scopes you can group hotkeys together. The default scope is the wildcard *
which matches all hotkeys. Use the <HotkeysProvider>
component to change active scopes. |
| keyup
| boolean
| false
| Determines whether to listen to the browsers keyup
event for triggering the callback. |
| keydown
| boolean
| true
| Determines whether to listen to the browsers keydown
event for triggering the callback. If you set both keyup
and keydown
to true, the callback will trigger on both events. |
| preventDefault
| boolean
or (keyboardEvent: KeyboardEvent, hotkeysEvent: HotkeysEvent) => boolean
| false
| Set this to a true
if you want the hook to prevent the browsers default behavior on certain keystrokes like meta+s
to save a page. NOTE: Certain keystrokes are not preventable, like meta+w
to close a tab in chrome. |
| description
| string
| undefined
| Use this option to describe what the hotkey does. this is helpful if you want to display a list of active hotkeys to the user. |
Overloads
The hooks call signature is very flexible. For example if you don't need to set any special options you can use the dependency array as your third parameter:
useHotkeys('ctrl+k', () => console.log(counter + 1), [counter])
isHotkeyPressed(keys: string | string[], splitKey?: string = ',')
This function allows us to check if the user is currently pressing down a key.
import { isHotkeyPressed } from 'react-hotkeys-hook'
isHotkeyPressed('esc') // Returns true if Escape key is pressed down.
You can also check for multiple keys at the same time:
isHotkeyPressed(['esc', 'ctrl+s']) // Returns true if Escape or Ctrl+S are pressed down.
Support
- Ask your question in the Github Discussions
- Ask your question on StackOverflow
Found an issue or have a feature request?
Open up an issue or pull request and participate.
Local Development
Checkout this repo, run yarn
or npm i
and then run the test
script to test the behavior of the hook.
Contributing
Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.
- Fork the Project
- Create your Feature Branch (
git checkout -b feature/AmazingFeature
) - Commit your Changes (
git commit -m 'Add some AmazingFeature'
) - Push to the Branch (
git push origin feature/AmazingFeature
) - Open a Pull Request
License
Distributed under the MIT License. See LICENSE
for more information.
Contact
Johannes Klauss - @JohannesKlauss - [email protected]
Project Link: https://github.com/JohannesKlauss/react-hotkeys-hook