keystate

Lightweight and expressive key handling for Javascript.

if(keys.left) {
  console.log('left arrow key down');
}

if(keys.ctrl && keys.p) {
  paste();
}

if(keys.shift || keys[0]) {
  // do magic
}

Installation

npm install keystate

or

bower install keystate

Usage

Keystate gives you access to a keys object whose properties reflect the boolean states of the keys on your keyboard. Keystate uses String.fromCharCode (along with some predefined mappings) so that you can check the state of any alphanumeric key, along with the following list of modifiers.

Here's a list of predefined sequences that will map to key codes.

backspace
tab
enter
ctrl
alt
caps
esc
left
space
up
right
down
insert
delete

This library deliberately does not support event handling for keys. It's designed to be used in something with a run loop, that needs to check the state of the keys each time it runs.

If you need more advanced functionality, I suggest checking out dmauro/Keypress.