<wxs src="../wxs/utils.wxs" module="utils" /> <view class="{{ border ? 'van-hairline--top-bottom' : '' }} {{ utils.bem('tabbar', { fixed, safe: safeAreaInsetBottom }) }} custom-class" style="{{ zIndex ? 'z-index: ' + zIndex : '' }}" > <slot /> </view> <view wx:if="{{ fixed && placeholder }}" style="height: {{ height }}px;"></view>