JavaScript iterate key & value from json?

Question

I am trying to iterate the following json:

{
"VERSION" : "2006-10-27.a",
"JOBNAME" : "EXEC_",
"JOBHOST" : "Test",
"LSFQUEUE" : "45",
"LSFLIMIT" : "2006-10-27",
"NEWUSER" : "3",
"NEWGROUP" : "2",
"NEWMODUS" : "640"
}

Here key is dynamic. I want both key = ? and value = ?

score 151 · Accepted Answer · edited Feb 17 '21 at 16:05

151

Use Object.keys() to get keys array and use forEach() to iterate over them.

var data = {
  "VERSION": "2006-10-27.a",
  "JOBNAME": "EXEC_",
  "JOBHOST": "Test",
  "LSFQUEUE": "45",
  "LSFLIMIT": "2006-10-27",
  "NEWUSER": "3",
  "NEWGROUP": "2",
  "NEWMODUS": "640"
};

Object.keys(data).forEach(function(key) {
  console.log('Key : ' + key + ', Value : ' + data[key])
})

edited Feb 17 '21 at 16:05

Jamiec

133,658
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answered Jun 07 '16 at 07:50

Pranav C Balan

113,687
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188

2

Great answer !!! Is there any way to do it with map where each element has key and value (Something built in) ? I usually create helper function which does this but I'm looking for something to use ES6,7 – Pini Cheyni Dec 03 '19 at 08:02

Jamiec · Answer 2 · 2023-04-24T06:47:27.097

You can use Object.keys for that.

const yourObject = {
  "VERSION": "2006-10-27.a",
  "JOBNAME": "EXEC_",
  "JOBHOST": "Test",
  "LSFQUEUE": "45",
  "LSFLIMIT": "2006-10-27",
  "NEWUSER": "3",
  "NEWGROUP": "2",
  "NEWMODUS": "640"
}
const keys = Object.keys(yourObject);
for (let i = 0; i < keys.length; i++) {
  const key = keys[i];
  console.log(key, yourObject[key]);
}

Or Object.entries

const yourObject = {
  "VERSION": "2006-10-27.a",
  "JOBNAME": "EXEC_",
  "JOBHOST": "Test",
  "LSFQUEUE": "45",
  "LSFLIMIT": "2006-10-27",
  "NEWUSER": "3",
  "NEWGROUP": "2",
  "NEWMODUS": "640"
}
const entries = Object.entries(yourObject);
for (let [key,value] of entries) {
  console.log(key, value);
}

JavaScript iterate key & value from json?

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