angular js: filter vs format

Filter transform the model to the display in view.

Formatter transform the display in view to model.

 

Filter
  <input type="text" name="objTxt" value="{a:1, b:[]}"
         ng:eval="obj = $eval(objTxt)"/>
  <pre>{{ obj | json }}</pre>


Formatter
  <div ng:init="data={name:'misko', project:'angular'}">
    <input type="text" size='50' name="data" ng:format="json"/>
    <pre>data={{data}}</pre>
  </div>