Js 封装：阻止频繁重复操作

function preventRepeat (fn, interval) {
    var _fn = fn,
        timer
  
    return function () {
        var args = arguments
            _this = this
  
        if (timer) {
            return false
        }
        _fn.apply(_this.args)
  
        timer = setTimeout(function () {
            clearTimeout(timer)
            timer = null
        }, interval || 3000)
    }
}
window.onmousemove = preventRepeat(function() {
    console.log("mouse move")
})