JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="app">
  <div ng-controller="GeojsonController">
    <textarea ng-model="geojson"></textarea>
    <p>Geojson is: {{getJson(geojson) | json}} </p>
  </div>
</div>

JavaScript

angular.module('app', [])
  .controller('GeojsonController', ['$scope', function($scope) {
    $scope.geojson = '{"type": "FeatureCollection"}';
    
    $scope.getJson = function(){
    	return JSON.parse($scope.geojson);
    }
  }]);