修复错误，增加验证

qingyiay

2023-05-17 ae1aad66a165ee7253bed2127a3b53baa40c2361

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export default {
    props: {
        // 用于滚动到指定item
        anchor: {
            type: [String, Number],
            default: uni.$u.props.listItem.anchor
        }
    }
}