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                1. document.addEventListener('touchstart') 禁止掉大部分事件的默認行為,能否成功阻止與DOM事件的冒泡有關聯,cancelable為true時才能阻止 1. 文字選中 2. 瀏覽器橡皮筋效果 2. 真機與瀏覽器模擬調試部分效果不同 3. 事件相關 1. PC端的事件可以在移動端觸發 2. PC端事件有300毫秒延遲 3. 移動端事件不會有延遲 4. 事件對象信息 1. changedTouches:觸發當前事件的手指列表 2. targetTouches:觸發當前事件時元素上的手指列表 3. touches:觸發當前事件時屏幕上的手指列表
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