javascript Parsing JSON in Javascript

June 20, 2015

Hello all,
I am new to Javascript and I am trying to parse the following JSON. But nothing happens so I'm assuming there is some error.

I am also trying to figure out how to loop through the JSON and access the data, but I can't even get it to load.

var text = [
    {"ITEM ONE":[
            {"SUB ONE":[
                    "one",
                    "two"
                ]
            },
            {"SUB TWO":[
                    "three",
                    "four"
                ]
            }

    ]},


    {"ITEM TWO":[
            {"SUB THREE":[
                    "five"
                ]
            },
            {"SUB FOUR":[
                    "six"
                ]
            }

    ]}
];

var obj = JSONArray.parse(text);
JSONObject jo = inputArray.getJSONObject(0);
document.getElementById("demo").innerHTML = obj(0);

Here are the variations that I've tried. For var obj, I tried using just JSON.parse(). I also tried not have the jo var.

And for the JSON itself, I also tried adding the following to each line 'JSON_HERE'+ To try and deal with the multiline JSON. I also put it all on one line.

I'm not sure what to do. Could someone show me the problem and some code that accesses the element and a snippet that loops through it?

June 20, 2015

...

Couple of issues:

1. You're assigning a real object to "text", not actual text that needs parsing

2. JSONArray isn't a type, use JSON.parse()

3. You never define an object called "inputArray"

4. Don't provide a type when creating an variable (JSONObject jo)

Below is a working demo that parses your JSON (as text) and writes a value from it into a <P> tag.

One more thing When testing javascript it's always helpful to load up your browsers developer tools (CTRL SHIFT I in Chrome, F12 in IE) and step though and inspect your code. You can learn a lot from it.

<!doctype html>
<html>
<head>
 
</head>
<body>
<p id="demo"></p>
 
 
<script>
var text = "[\
    {\"ITEM ONE\":[\
            {\"SUB ONE\":[\
                    \"one\",\
                    \"two\"\
                ]\
            },\
            {\"SUB TWO\":[\
                    \"three\",\
                    \"four\"\
                ]\
            }\
    ]},\
    {\"ITEM TWO\":[\
            {\"SUB THREE\":[\
                    \"five\"\
                ]\
            },\
            {\"SUB FOUR\":[\
                    \"six\"\
                ]\
            }\
    ]}\
]";
 
var obj = JSON.parse(text);
var jo = obj[0];
document.getElementById("demo").innerText = obj[0]["ITEM ONE"][0]["SUB ONE"][0];
</script>
 
</body>
</html>

June 20, 2015

try text[0][0];

the text variable you wrote is a JSON object, not JSON text so there is no point in parsing it. I dont think JSONArray is a valid JavaScript type

June 21, 2015

...

Thank you very much!

Sign In

Mini Spy

Internet Download Manager (IDM) 6.35 Build 12

Lookalike

NASA Commercial Crew (CCtCap) test milestones

WinSnap 5.1.6

Google Earth now lets you create virtual tours and presentations

Sign in to Neowin Faster!

javascript Parsing JSON in Javascript

Question

Share this post

Link to post

Share on other sites

3 answers to this question

Recommended Posts

Share this post

Link to post

Share on other sites

Share this post

Link to post

Share on other sites

Share this post

Link to post

Share on other sites

Create an account or sign in to comment

Create an account

Sign in

Recently Browsing 0 members

Company

Community

Social

Partners

Forums