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vue如何设置页面加载完成，再执行指令

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vue如何设置页面加载完成，再执行指令

想获取img宽度后，用proportion设置img的高度，但会出现页面还没加载完，指令获取到的宽度小于img实际宽度的情况。

clipboard.png

clipboard.png


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by (71.8m points)

父节点添加v-if="data"，还没获取到数据就不会执行子节点


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