<input
  class="keep_input"
  v-number-only
  style="width:35px"
  v-model="scope.row.fileOrder"
  @input="scope.row.fileOrder = Number($event.target.value.replace(/\D+/, ''))"
 />

 directives: {
  numberOnly: {
   bind: function(el) {
    el.handler = function() {
     el.value = Number(el.value.replace(/\D+/, ''))
    }
    el.addEventListener('input', el.handler)
   },
   unbind: function(el) {
    el.removeEventListener('input', el.handler)
   }
  }
 },

 .keep_input {
  -webkit-appearance: none;
  background-color: #fff;
  background-image: none;
  border-radius: 4px;
  border: 1px solid #dcdfe6;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  color: #606266;
  display: inline-block;
  font-size: inherit;
  outline: 0;
  padding: 0 15px;
  -webkit-transition: border-color 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
  transition: border-color 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
  height: 30px;
  line-height: 30px;
  text-align: left;
 }
 .keep_input:focus {
  border-color: #54a6de;
  outline: 0;
 }

<el-input type="number"
 oninput="if(value.length>10)value=value.slice(0,10)"
 @keyup.enter.native="query()"
 onKeypress="return(/[\d\.]/.test(String.fromCharCode(event.keyCode)))"
 :max="99999999">
 </el-input>