AngularJS format JSON string output

I have an AngularJS application, which collects data from input, transforms a model into a string using JSON.stringify() and lets a user edit this model in such a way that input fields get updated if the <textarea> element is updated and vice versa. Some kind of two-way binding :)

The problem is that the String itself looks ugly and I would like to format it so it looks like this:

enter image description here

And not like it looks now:

enter image description here

Any ideas how this can be accomplished? If you need some additional info - don't hesitate asking. Every answer is highly appreciated and answered immediately.

Thank you.

P.S. I guess this should be some kind of directive or a custom filter. Data itself SHOULD NOT be changed, only the output.

Solution 1:

Angular has a built-in filter for showing JSON

<pre>{{data | json}}</pre>

Note the use of the pre-tag to conserve whitespace and linebreaks

Demo:

angular.module('app', [])
  .controller('Ctrl', ['$scope',
    function($scope) {

      $scope.data = {
        a: 1,
        b: 2,
        c: {
          d: "3"
        },
      };

    }
  ]);

<!DOCTYPE html>
<html ng-app="app">

  <head>
    <script data-require="[email protected]" data-semver="1.2.15" src="//code.angularjs.org/1.2.15/angular.js"></script>
  </head>

  <body ng-controller="Ctrl">
    <pre>{{data | json}}</pre>
  </body>

</html>

There's also an angular.toJson method, but I haven't played around with that (Docs)

Solution 2:

You can use an optional parameter of JSON.stringify()

JSON.stringify(value[, replacer [, space]])

Parameters

value The value to convert to a JSON string.

replacer If a function, transforms values and properties encountered while stringifying; if an array, specifies the set of properties included in objects in the final string. A detailed description of the replacer function is provided in the javaScript guide article Using native JSON.

space Causes the resulting string to be pretty-printed.

For example:

JSON.stringify({a:1,b:2,c:{d:3, e:4}},null,"    ")

will give you following result:

"{
    "a": 1,
    "b": 2,
    "c": {
        "d": 3,
        "e": 4
    }
}"

Solution 3:

If you are looking to render JSON as HTML and it can be collapsed/opened, you can use this directive that I just made to render it nicely:

https://github.com/mohsen1/json-formatter/

enter image description here

AngularJS format JSON string output

Solution 1:

Solution 2:

Solution 3:

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