Javascript : Access JSON data example

Problem:

You have a JSON string such as below and you want to access the data individually via Javascript. How to access the JSON data with Javascript?

 {
  "name": "adamng",
  "age": 38,
  "address": {
 "street": "108 Street",
 "city": "Singapore"
  },
  "email": [{
 "type": "personal",
 "address": "adamng@somewherepersonal.com"
  }, {
 "type": "business",
 "address": "adamng@someworkplace.com"
  }]
 }

Solution:

Use JSON.Parse() to parse(process) the JSON string into a Javascript JSON Object and access the data via the JSON object.

Here you go!

Save this block of code into test.html file and view it with your browser.

 <html>
 <script>
 var JSONdata = '{"name": "adamng","age": 38,"address": {"street": "108 Street", "city": "Singapore" },"email": [{"type": "personal","address": "adamng@somewherepersonal.com"}, {"type": "business","address": "adamng@someworkplace.com"}]}';

  var JSONObject = JSON.parse(JSONdata);

 // retrieve the name
  alert("Name :"+JSONObject["name"]); 
  alert(JSONObject.name); 

 // retrieve the age
  alert(JSONObject["age"]); 
  alert(JSONObject.age); 

  alert(JSONObject.address.street);
  alert(JSONObject["address"].city); 

 // access the first email object properties
  alert(JSONObject.email[0].address); 

 // access the second email object properties
  alert(JSONObject.email[1].type);

 </script>
 </html>

Javascript : Access JSON data example

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See also : Javascript : How to loop over and parse JSON data?

By Adam Ng

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