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The events cannot have their default action cancelled. Other buttons do not trigger key events.
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这些事件不能取消他们的默认动作。其他按钮不能触发按键事件。
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==== Touch/Mouse Events ====
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==== 触摸/鼠标事件 ====
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<em>onmousedown</em>, <em>onmouseup</em> & <em>onclick</em> are all triggered by the browser. However, the <em>onmousedown</em> event doesn't trigger until you lift the stylus or you've held it on the screen for ~2 seconds—which is when text selection mode is activated—making it pretty much the same as <em>onmouseup</em>. The events cannot have their default action cancelled.