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How to Use CSS Transitions? To create a transition effect, you must specify two things: 트랜지션 효과를 주고 싶다면 두가지만 기억하세요 the CSS property you want to add an effect to 효과를 주려는 css속성 the duration of the effect 효과의 시간 Note: If the duration part is not specified, the transition will have no effect, because the default value is 0. The following example shows a 100px * 100px red element. The element has als..