KeyBind

A small library which helps to add key bindings to your web app.

KeyBind records keys and stores them in a stack. Keys are added on keydown (registered on document.body) and removed on keyup (registered on document.body). On each keydown event key stack is matched against registered key handlers. If one is matching it fires. The Ctrl, Alt, Meta keys clear the key stack. The reason is that browser original keybindings will trigger keydown event but not keyup (like Ctrl+s, Ctrl+u or F1).

Useage

const KeyBind = require("keybind");

// add event listener for key binding `a+b`
function handler(ev) {};
KeyBind.addEventListener(['a', 'b'], handler) {});
// remove key bind listener
KeyBind.removeEventListener(['a', 'b']);
// or using a callback
KeyBind.removeEventListener(null, handler);

// start listening on keydown and keyup events on `document.body` element
KeyBind.enable();
// stop listening on `document.body` events
KeyBind.disable();

// clear key stack: remove recorded keys from the key stack
KeyBind.clearKeyStack();

// reset: remove all handlers and clear the key stack
KeyBind.reset();

// dispose: remove all handlers and event listeners, this is just runs: `KeyBind.clearKeyStack()`, `KeyBind.reset()` and `KeyBind.disable()`;
KeyBind.dispose();