Json value in Null hot to catch Javascript exception

Question

I get data json throw ajax from action-struts 2 for my view. some data set of data.

Example

{"home":"1234","room": null}.

I can read data.home, and I get 1234 value, but when I try read data.room, I got Uncaught error in console of browser, How can I do to manage this Uncaught error...

Answer 1

just add a test

/* ------
var
  data = {"home":"1234","room": null},
  h    = (data.home) ? data.home : '',
  r    = (data.room) ? data.room : 0;
------ */
var
  data = {"home":"1234","room": null},
  h    = data.home || '',
  r    = data.room || 0;
  
console.log('h=',h);
console.log('r=',r);

Answer 2

In this way you can deal with null values in your object ,you can replace them with empty string or whatever values you want you wont face exception in this way in browser.See JSON.parse

let obj={"home":"1234","room": null};
let newobj=JSON.parse(JSON.stringify(obj),(key,value)=> value===null? "" : value )    
console.log(newobj)