git ssb

1
module.exports = ExpanderHook
2
3
function ExpanderHook (needsExpand) {
4
  return expander.bind(null, needsExpand)
5
}
6
7
function expander (needsExpand, element) {
8
  const handler = { handleEvent, needsExpand, element }
9
  handleEvent.call(handler)
10
11
  if (element.querySelector('img')) {
12
    // just in case images are still loading
13
    setTimeout(handleEvent.bind(handler), 200)
14
    element.addEventListener('mouseover', handler)
15
    return element.removeEventListener.bind(element, 'mouseover', handler)
16
  }
17
}
18
19
function handleEvent () {
20
  const { needsExpand, element } = this
21
  if (!needsExpand()) {
22
    if (element.firstElementChild && element.firstElementChild.clientHeight + 5 > element.clientHeight) {
23
      needsExpand.set(true)
24
    }
25
  }
26
}
27