JSFiddle - React, Tailwind, and code Playground

HTML

<table ng-controller="MyFirstController as fc">
  <thead>
    <th>Field-1</th>
    <th>Operator</th>
    <th>Field-2</th>
    <th>Comments</th>
  </thead>
  <tbody>
    <tr ng-repeat="i in conditionslv">
      <td>
        <select ng-model="i.expression1" required>
          <option ng-repeat="item in fc.field1dropdown" value="{{item.FieldName}}">{{item.DisplayName}}</option>
        </select>
      </td>
      <td>
        <select ng-model="i.operatortypeid" ng-required="true" ng-options="item.OperatorTypeId as item.OperatorTypeName for item in fc.operatordropdown"></select>
      </td>
      <td>
        <input type="text" ng-model="i.expressionvalue" ng-disabled="i.expression2value!=''||i.operatortypeid>5">/
        <select ng-model="i.expression2value" ng-disabled="i.expressionvalue!=''||i.operatortypeid>5" required>
          <option ng-repeat="item in fc.field1dropdown" value="{{item.FieldName}}">{{item.DisplayName}}</option>
        </select>



      </td>
      <td>
        <textarea rows="1" cols="40" ng-model="i.comments"></textarea><span ng-click="conditionslv.splice($index,1)" ng-if="conditionslv.length>1"><span class="k-icon k-font-icon k-i-x"></span></span>
      </td>
    </tr>

  </tbody>

</table>

JavaScript

angular.module('myFirstApp', [])

.controller('MyFirstController', function($scope) {
  var flowchart = this;
  $scope.conditionslv = [];
  flowchart.field1dropdown = [{
    "FieldName": "",
    "DisplayName": "select"
  }, {
    "FieldName": "se",
    "DisplayName": "se"
  }, {
    "qw": "",
    "DisplayName": "qw"
  }]
  flowchart.operatordropdown = [{
    "OperatorTypeId": '',
    "OperatorTypeName": "select",
    "WFSubConditions": []
  }, {
    "OperatorTypeId": 1,
    "OperatorTypeName": "Greater Than",
    "WFSubConditions": []
  }]
  flowchart.addconditionrow = function() {
    $scope.conditionslv.push({
      expression1: '',
      operatortypeid: '',
      expressionvalue: "",
      expression2value: "",
      comments: ""
    });
    console.log(JSON.stringify($scope.conditionslv));


  }
  flowchart.cancelConditons = function() {

    flowchart.diagramshow = true;
    flowchart.conditions = false;


  }
  flowchart.saveconditions = function() {

  }	
  flowchart.addconditionrow();
});