- function getSweepBox () {
- varsweepBox = elem.querySelector('.xu-sweep-box')
- if(!sweepBox) {
- showBox = document.createElement('div')
- showBox.className = 'xu-sweep-box'
- setStyle(sweepBox, {
- border: '1px solid #44f',
- width: width / 2 - 2+ 'px',
- height: height / 2 - 2 + 'px',
- background: '#ff0',
- opacity: '.4',
- position: 'absolute',
- display: 'none',
- cursor: 'move'
- })
- elem.appendChild(sweepBox)
- }
- return sweepBox
- }
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