global "direction" variable

[ibc]

In src/Hammer.js:

function updateHammer (hammer, props) {
        if (props.hasOwnProperty('vertical')) {
                console.warn('vertical is deprecated, please use `direction` instead');
        }

        var directionProp = props.direction;
        if (directionProp || props.hasOwnProperty('vertical')) {
                direction = directionProp ? directionProp : (props.vertical ? 'DIRECTION_ALL' : 'DIRECTION_HORIZONTAL');

so it's creating a global window.direction variable, which is a bug.

[ibc]

eslint, jshint, jscs... etc etc. Please, check your code with any of them. They all would notify such a non declared variable (that hence becomes a global variable).