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vue如何在绑定的元素前面或后面加字符串?

例如如下代码:

<div class="file" v-if="item.fileList" :id="item.id">

然而还是希望id属性加点字符串啥的,但是不知道该如何加?特意请教高手像这样的话,如何给id属性加个固定的前缀或后缀字符串呢?

渲染后的节点属性值类似如下:

file100 或者 100file


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<div class="file" v-if="item.fileList" :id="`file${item.id}`">

<div class="file" v-if="item.fileList" :id="'file' + item.id">

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