| 335 | |
| 336 | // 滚动条事件 |
| 337 | function windowScroll(fn1) { |
| 338 | var beforeScrollTop = document.documentElement.scrollTop, |
| 339 | fn = fn1 || function () {}; |
| 340 | setTimeout(function () { // 延时执行，避免刚载入到页面就触发翻页事件 |
| 341 | window.addEventListener('scroll', function (e) { |
| 342 | var afterScrollTop = document.documentElement.scrollTop, |
| 343 | delta = afterScrollTop - beforeScrollTop; |
| 344 | if (delta == 0) return false; |
| 345 | fn(delta > 0 ? 'down' : 'up', e); |
| 346 | beforeScrollTop = afterScrollTop; |
| 347 | }, false); |
| 348 | }, 1000) |
| 349 | } |
| 350 | |
| 351 | |
| 352 | // 修改自 https://greasyfork.org/scripts/14178 , https://github.com/machsix/Super-preloader |