Print JSON parsed object?

Question

I've got a javascript object which has been JSON parsed using JSON.parse I now want to print the object so I can debug it (something is going wrong with the function). When I do the following...

for (property in obj) {
    output += property + ': ' + obj[property]+'; ';
}
console.log(output);

I get multiple [object Object]'s listed. I'm wondering how would I print this in order to view the contents?

Answer 1

try console.dir() instead of console.log()

console.dir(obj);

MDN says console.dir() is supported by:

• FF8+
• IE9+
• Opera
• Chrome
• Safari

Answer 2

If you want to debug why not use console debug

window.console.debug(jsonObject);

Answer 3

Just use

console.info("CONSOLE LOG : ")
console.log(response);
console.info("CONSOLE DIR : ")
console.dir(response);

and you will get this in chrome console :

CONSOLE LOG : 
facebookSDK_JS.html:56 Object {name: "Diego Matos", id: "10155988777540434"}
facebookSDK_JS.html:57 CONSOLE DIR : 
facebookSDK_JS.html:58 Objectid: "10155988777540434"name: "Diego Matos"__proto__: Object

Answer 4

Most debugger consoles support displaying objects directly. Just use

console.log(obj);

Depending on your debugger this most likely will display the object in the console as a collapsed tree. You can open the tree and inspect the object.

Answer 5

If you want a pretty, multiline JSON with indentation then you can use JSON.stringify with its 3rd argument:

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

For example:

var obj = {a:1,b:2,c:{d:3, e:4}};

JSON.stringify(obj, null, "    ");

or

JSON.stringify(obj, null, 4);

will give you following result:

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

In a browser console.log(obj) does even better job, but in a shell console (node.js) it doesn't.

Answer 6

You know what JSON stands for? JavaScript Object Notation. It makes a pretty good format for objects.

JSON.stringify(obj) will give you back a string representation of the object.