Ant-Design-Vue表格单元格背景色设置并且前三列不设置

如果你想在Ant-Design-Vue表格中设置单元格的背景色，可以使用`customRender`属性来自定义单元格的渲染方式，具体可以参考以下代码：

<template>
  <a-table :columns="columns" :data-source="data">
    <template slot="name" slot-scope="text, record">
      <span :style="{backgroundColor: record.color}">{{text}}</span>
    </template>
  </a-table>
</template>

<script>
export default {
  data() {
    return {
      columns: [
        {
          title: "Name",
          dataIndex: "name",
          key: "name",
          customRender: (text, record, index) => {
            if (index > 2) {
              return <span :style="{backgroundColor: record.color}">{text}</span>;
            } else {
              return text;
            }
          },
        },
        {
          title: "Age",
          dataIndex: "age",
          key: "age",
        },
        {
          title: "Address",
          dataIndex: "address",
          key: "address",
        },
      ],
      data: [
        {
          key: 1,
          name: "John Brown",
          age: 32,
          address: "New York No. 1 Lake Park",
          color: "#f0f0f0",
        },
        {
          key: 2,
          name: "Jim Green",
          age: 42,
          address: "London No. 1 Lake Park",
          color: "#f0f0f0",
        },
        {
          key: 3,
          name: "Joe Black",
          age: 32,
          address: "Sidney No. 1 Lake Park",
          color: "#f0f0f0",
        },
        {
          key: 4,
          name: "Jim Red",
          age: 32,
          address: "London No. 2 Lake Park",
          color: "#f0f0f0",
        },
        {
          key: 5,
          name: "Jake White",
          age: 32,
          address: "Dublin No. 2 Lake Park",
          color: "#f0f0f0",
        },
      ],
    };
  },
};
</script>

在上述代码中，我们通过`customRender`方法来自定义单元格的渲染方式，并且在前三列不设置单元格的背景色。具体实现中，我们在`customRender`方法中判断当前单元格的索引是否大于2，如果是，则渲染带有背景色的`span`标签，否则直接返回文本。同时，我们在模板中使用`slot`以及`slot-scope`属性来渲染自定义单元格。