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var st = this.scrollY; | var st = this.scrollY; | ||
// 判斷是向上捲動,而且捲軸超過 200px | // 判斷是向上捲動,而且捲軸超過 200px | ||
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if (st < lastScrollY) { | if (st < lastScrollY) { | ||
bodyClass.remove('hideUp'); | bodyClass.remove('hideUp'); | ||
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bodyClass.add('hideUp'); | bodyClass.add('hideUp'); | ||
} | } | ||
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Revision as of 03:58, 22 October 2019