用computed计算绑定class类名

174
<div class="col" :class="colClass" :style="colStyle">

  </div>
  
  computed: {
    colClass() {
     let ClassName = true ? 'ClassNameA' ? 'ClassNameB'
     return ClassName
    },
    colStyle() {
      return {
        paddingLeft: this.gutter / 2 + "px",
        paddingRight: this.gutter / 2 + "px",
      };
    },
  },