Question

I am iterating through a json object and it fails due to an extra element.

see code bellow

{
"rootLayout":"main",
"layoutDescriptions":[
      {
        "type":"Panel",
        "label":"Repeating Groups By Subform",
        "layout":"SimpleForm",
        "content":[
          { "type":"label", "constraint":"newline", "text":"Contacts" },
          { "type":"repeatableGroup", "property":"contacts", "contentRef":"ContactSubForm" }
        ]
      },
      {
        "type":"Panel",
        "label":"",
        "container" : {
          "type":"Panel",
          "layout":"SimpleForm",
          "content":[
            { "type":"label", "constraint":"newline", "text":"Contact Name" },
            { "type":"ListView", "property":"contactName", "listProps":["contactName","telephone","email"] }
          ]
        }
      },

it fails on the second element in the array I am using the following to get my results

data.layoutDescriptions[0].container.content[i].content

I know its stopping because on

data.layoutDescriptions[0].container.content[1].content

it expects

data.layoutDescriptions[0].container.content[1].container.content

so my question is how do I say if container is present do this else do this.

I am trying this at the moment which does not work.

    var contentObjects = data.layoutDescriptions[0].container.content[1].content;
if(contentObjects.container){
                 alert("container exists");
                 }
                         else{
                  alert("nope");
                  }

Thanks.

Answer 1

use hasOwnProperty to check if an object has its own property exists:

 var contentObjects = data.layoutDescriptions[0].container.content[1];
 if(contentObjects.hasOwnProperty('container'){
     alert("container exists");
 }
 else{
     alert("nope");
 }