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            > Setting the display property to none will terminate any running animation applied to the element and its descendants. If an element has a display of none, **updating display to a value other than none will start all animations applied to the element by the animation-name property**, as well as all animations applied to descendants with display other than none.
         
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            `display:none`が設定されているノードの`display`プロパティを`none`以外の値にすると, そのノードに設定されている全てのCSSアニメーションが実行されるよ.
         
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            [https://www.w3.org/TR/css-animations-1/](https://www.w3.org/TR/css-animations-1/)
         
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