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vue 里js怎么判断<svg><i>在页面上是空白的

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vue 里js怎么判断<svg><i>在页面上是空白的

如题，我是用循环生成的图标，但某些是为空，就是在页面上是空白的，我该怎么判断这个<svg>或在页面上是空白的

感谢大婶们的解答！


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