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index.js
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index.js
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var Emitter = require('events/')
module.exports = attach
function attach(element, listener) {
var position = new Emitter
position[0] = 0
position[1] = 0
position.prev = [0, 0]
position.flush = flush
position.dispose = dispose
if (typeof window === 'undefined') {
return position
}
listener = listener || element || window
element = element || document.body
var handler = (element === document.body || element === window
) ? function(e) {
position.prev[0] = position[0]
position.prev[1] = position[1]
position[0] = e.clientX
position[1] = e.clientY
position.emit('move', e)
}
: function(e) {
position.prev[0] = position[0]
position.prev[1] = position[1]
var bounds = element.getBoundingClientRect()
position[0] = e.clientX - bounds.left
position[1] = e.clientY - bounds.top
position.emit('move', e)
}
listener.addEventListener('mousemove', handler, false)
return position
function flush() {
position.prev[0] = position[0]
position.prev[1] = position[1]
}
function dispose() {
position.removeAllListeners('move')
listener.removeEventListener('mousemove', handler)
}
}