正则只能输入数字和英文逗号，如:12,34 ,25 45,

<el-form-item prop="get">
  <el-input v-model="form.get"
   @input="(val)=>{getUps(val)}"
   autocomplete="off" style="width: 260px;" placeholder="请输入">
  </el-input>
  <span class="lengthMIn">（以英文逗号分隔）</span>
</el-form-item>

<script>
  var validGet = (rule, value, callback) => {
    if (value) {
      var reg = /^(\d+,?)+$/;
      if (!reg.test(value)) {
        callback(new Error('输入不合法'));
      } else {
        callback()
      }
    } else {
      callback()
    }
  }
  export default {
    methods: {
    getUps(val) {
      this.form.getShell = val.replace(/[^0-9,]/g, '');
    },
      submitForm(formName) {
        this.$refs[formName].validate((valid) => {
          if (valid) {
            
          }
        });
      }
    },
    data() {
      return {
        rules: {
          get: [{ required: true, message: '请输入' },
          { validator: validGet, trigger: 'blur' }
          ]
        }
      };
    }
  };
</script>