2020-04-26 element更改表头样式

<el-table
  :data="data"
  :header-cell-style="{background:'#87bdee'}"
 >

 methods: {
    getRowClass ({ row, column, rowIndex, columnIndex }) {
      if (rowIndex === 0) {
        return 'background:#87bdee;color:#000000;text-align:center;font-size:14px;font-weight:500;'
      } else {
        return ''
      }
    }
}