| 251 | |
| 252 | // 滚动条事件 |
| 253 | function windowScroll(fn1) { |
| 254 | var beforeScrollTop = document.documentElement.scrollTop, |
| 255 | fn = fn1 || function () {}; |
| 256 | setTimeout(function () { // 延时执行，避免刚载入到页面就触发翻页事件 |
| 257 | window.addEventListener('scroll', function (e) { |
| 258 | var afterScrollTop = document.documentElement.scrollTop, |
| 259 | delta = afterScrollTop - beforeScrollTop; |
| 260 | if (delta == 0) return false; |
| 261 | fn(delta > 0 ? 'down' : 'up', e); |
| 262 | beforeScrollTop = afterScrollTop; |
| 263 | }, false); |
| 264 | }, 1000) |
| 265 | } |
| 266 | |
| 267 | |
| 268 | // 修改自 https://greasyfork.org/scripts/14178 , https://github.com/machsix/Super-preloader |