以下代码报错：

<el-upload action="#" list-type="picture-card" :auto-upload="false" limit="1"></el-upload>

报错提示：

[Vue warn]: Invalid prop: type check failed for prop "limit". Expected Number with value 1, got String with value "1".

将limit属性改为单向绑定就好了：

<el-upload action="#" list-type="picture-card" :auto-upload="false" :limit="1"></el-upload>

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