javascript - using ng-show on option select angularjs -

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i want bind input field select option. if select option yes, input field should visible , if no, input field should hidden. 

(function(){    var app = angular.module('spa',[      $rootscope.options = [       {         id: 0,         name: 'no'       },        {         id: 1,         name: 'yes'       }     ]    ]);    }());    <form name="newdata" class="ng-scope ng-pristine ng-invalid ng-invalid-required" error-popup="newdata" novalidate>      <div class="form-group item item-input item-select">       <div class="input-label">         booking fee paid       </div>       <select name="booking" ng-model="user.booking" class="form-control ng-pristine ng-invalid ng-invalid-required" ng-options="option.name option in options track option.id" ng-init ="user.booking = options[0]" required>       </select>     </div>        <div class="row" ng-show="user.booking.name == 'yes'">         <div class="col">         <div class="form-group item item-input">                 <input type="text" name="amount" ng-model="user.amount" class="form-control" placeholder="amount">             </div>          </div>     </div>   </form>

http://plnkr.co/edit/v0nrbteigo3lm1njru9a?p=preview

any appreciated

i suggest go through beginner tutorials @ angularjs.org.

here working sample you're asking for:

angular.module('app', [])      .controller('sample', sample);    function sample() {      this.options = [{          id: 0,          name: 'no'      }, {          id: 1,          name: 'yes'      }];      this.booking = this.options[0];  }
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>  <div ng-app="app" ng-controller="sample vm">            <select name="booking" ng-model="vm.booking" ng-options="option.name option in vm.options"></select>            <pre>{{ vm.booking | json }}</pre>            <input type="text" ng-show="vm.booking.name === 'yes'"/>  </div>


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