Version: v4.10.0

use-key-ref

About#

Very similar useKey but it returns a ref

Installation#

npm install --save @rooks/use-key-ref

Importing the hook#

import useKeyRef from "@rooks/use-key-ref"

Usage#

Basic example with keydown#

function Demo() {
function vowelsEntered(e) {
console.log("[Demo 1] You typed a vowel");
}
// window is the target
const inputRef = useKeyRef(["a", "e", "i", "o", "u"], vowelsEntered);
return (
<>
<p>Press a,e,i,o,u in the input to trigger a console.log statement</p>
<input ref={inputRef} />
</>
);
}
render(<Demo />);

Multiple handlers on the same element#

function Demo() {
function vowelsEntered(e) {
console.log("[Demo 1] You typed a vowel");
}
function capitalVowelsEntered(e) {
console.log("[Demo 1] You typed a capital vowel");
}
// window is the target
const keyRef1 = useKeyRef(["a", "e", "i", "o", "u"], vowelsEntered);
const keyRef2 = useKeyRef(["A", "E", "I", "O", "U"], capitalVowelsEntered);
const inputRef = useMergeRefs(keyRef1, keyRef2)
return (
<>
<p>Press a,e,i,o,u in the input to trigger a console.log statement</p>
<input ref={inputRef} />
</>
);
}
render(<Demo />);

Multiple kinds of events#

function Demo() {
function onKeyInteraction(e) {
console.log("[Demo 2]Enter key", e.type);
}
const inputRef = useKeyRef(["Enter"], onKeyInteraction, {
target: inputRef,
eventTypes: ["keypress", "keydown", "keyup"]
});
return (
<>
<p>Try "Enter" Keypress keydown and keyup </p>
<p>
It will log 3 events on this input. Since you can listen to multiple
types of events on a keyboard key.
</p>
<input ref={inputRef} />
</>
);
}
render(<Demo />);

Conditionally setting handlers#

function Demo() {
const [shouldListen, setShouldListen] = useState(false);
function toggleShouldListen() {
setShouldListen(!shouldListen);
}
function onKeyInteraction(e) {
console.log("[Demo 3] Enter key", e.type);
}
const inputRef = useKeyRef(["Enter"], onKeyInteraction, {
eventTypes: ["keypress", "keydown", "keyup"],
when: shouldListen
});
return (
<>
<p>
Enter key events will only be logged when the listening state is true.
Click on the button to toggle between listening and not listening
states.{" "}
</p>
<p>
Handy for adding and removing event handlers only when certain
conditions are met.
</p>
<input ref={inputRef} />
<br />
<button onClick={toggleShouldListen}>
<b>{shouldListen ? "Listening" : "Not listening"}</b> - Toggle{" "}
</button>
</>
);
}
render(<Demo />);

Codesandbox Examples#

Basic Usage#

Join Bhargav's discord server#

You can click on the floating discord icon at the bottom right of the screen and talk to us in our server.

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