element ui border表头设置背景颜色

<el-table :data="list" v-loading="listLoading" element-loading-text="给我一点时间":header-cell-style="{background:'#FAFAFA'}"fit highlight-current-row style="width: 99%">

其中这句代表设置背景颜色 :header-cell-style="{background:'#FAFAFA'}"