WebJavaScript:尝试减去两个变量会为我返回NaN,javascript,Javascript,我正在尝试建立一个简单的卡路里计算器,由于一些奇怪的原因,我的总卡路里(卡路里,一个整数,减去卡路里减少,一个整数)的数学一直返回NaN。 Web14 Oct 2024 · 聚焦难,ios机型需要双击或者长按才会获取到焦点. 由于项目中使用了Fastclick插件导致无法聚焦。 fastclick在ios条件下ontouchend方法中若needsClick(button、select、textarea、input、label、iframe、video 或类名包含needsclick)为不可点击防止了事件冒泡(preventDefault),所以出现无法点击情况。
HTMLInputElement: setSelectionRange() method - Web …
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What control should I use to indicate multi-select lists on iOS?
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