Modifier key queries

Inspired by keymaster. This is a small subset of the functionality in that library. See for yourself how small it is.

At any point in time you can query the modifiers object to see if a modifier key is held down.

Default supported keys are: shift, alt, option (same as alt), control, command

1if (modifiers.command || modifiers.control) {
2  // do something special
3}
4
5// ..inside your click handler
6if (modifiers.shift) {
7  ...
8}

You can also add your own to the defaults:

1modifiers.add({{
2  leftArrow: 37,
3  upArrow: 38,
4  rightArrow: 39,
5  downArrow: 40,
6  w: 87,
7  a: 65,
8  s: 83,
9  d: 68
10});

Building

To create the minified and compressed version with source mapping, run:

uglifyjs modifiers.js --source-map modifiers.min.map --screw-ie8 -c -m -o modifiers.min.js

The code uses addEventListener so if you sadly need to support IE8 you'll want to change the code to use something like what's described here.

License

MIT