nutui/miniprogram_dev/components/packages/button/index.wxml

<wxs src="./index.wxs" module="computed" />

<view class="{{computed.classes({type,size,shape,plain,block,disabled,loading})}}" style="{{computed.styled({color,plain})}}"  bindtap="handleClick">
    <view class="nut-button__warp">
      <nut-icon class="nut-icon-loading" style="line-height:initial" name="loading" wx:if="{{loading}}"></nut-icon>
      <nut-icon
        wx:if="{{icon && !loading}}"
        name="{{icon}}"
        class-prefix="{{iconClassPrefix}}"
        font-class-name="{{iconFontClassName}}"
        style="line-height:initial"
      ></nut-icon>
      <view class="{{ (icon || loading)?'text':'' }}">
        <slot></slot>
      </view>
    </view>
</view>