<el-checkbox-group v-model="checkList" @change="changeList">
          <el-checkbox
            :disabled="item.disabled"
            :label="item.name"
            v-for="item in list"
            :key="item.name"
          ></el-checkbox>
        </el-checkbox-group>

data(){return{
    checkList: [],
      list: [
        { disabled: false, name: "GJB5000" },
        { disabled: false, name: "GJB9001" },
        { disabled: false, name: "CMMI" },
        { disabled: false, name: "合同未指定" },
      ],

}}

 


changeList(val) {
      this.list.forEach((item) => {
        item.disabled = false;
      });
      if (val.indexOf("合同未指定") != -1) {
        this.checkList = ["合同未指定"];
        this.list.forEach((item) => {
          if (item.name != "合同未指定") {
            item.disabled = true;
          }
        });
      }
    },