Storing JSON information within a variable

Question

Storing JSON information within a variable

I'm currently working on an autocomplete form that automatically populates the location field based on the user's zipcode. Below is the code snippet I've written to retrieve a JSON object containing location information using the provided zipcode:

var client = new XMLHttpRequest();
client.open("GET", "http://api.zippopotam.us/nl/1012", true);
client.onreadystatechange = function() {
    if(client.readyState == 4) {
        // alert(client.responseText);
        var jsonObj = [client.responseText]

    };
};

client.send();

My challenge now is to extract only the location data from the JSON response and store it in a variable. What I want to achieve is something like this:

var location = 'Amsterdam'

Any suggestions or tips would be greatly appreciated. Thank you!

javascript json

Answer 1

Answer №1

After examining the result of a GET request to http://api.zippopotam.us/nl/1012, here is the output:

{
    "post code" : "1012",
    "country" : "Netherlands",
    "country abbreviation" : "NL",
    "places" : [{
            "place name" : "Amsterdam Binnenstad en Oostelijk Havengebied",
            "longitude" : "4.9027",
            "state" : "Noord-Holland",
            "state abbreviation" : "NH",
            "latitude" : "52.3666"
        }
    ]
}

To extract specific data from this response, you can utilize the following code snippet:

var jsonResponse= JSON.parse(client.responseText);
var locations=jsonResponse.places; //an array!
if (places.length) {
  var firstLocation=locations[0]['place name'];
}

Answer 2

After examining the result of a GET request to http://api.zippopotam.us/nl/1012, here is the output:

{
    "post code" : "1012",
    "country" : "Netherlands",
    "country abbreviation" : "NL",
    "places" : [{
            "place name" : "Amsterdam Binnenstad en Oostelijk Havengebied",
            "longitude" : "4.9027",
            "state" : "Noord-Holland",
            "state abbreviation" : "NH",
            "latitude" : "52.3666"
        }
    ]
}

To extract specific data from this response, you can utilize the following code snippet:

var jsonResponse= JSON.parse(client.responseText);
var locations=jsonResponse.places; //an array!
if (places.length) {
  var firstLocation=locations[0]['place name'];
}

Answer 3

Answer №2

Can you please share the XML request response that you received? To extract data from a JSON object using JavaScript, you can do the following:

var jsonData = JSON.parse(jsonObject)

Then, you can access specific values from the JSON object like this:

var name = jsonData['name']

Make sure to replace name with the actual key value you are trying to retrieve from the JSON data.

Answer 4

Can you please share the XML request response that you received? To extract data from a JSON object using JavaScript, you can do the following:

var jsonData = JSON.parse(jsonObject)

Then, you can access specific values from the JSON object like this:

var name = jsonData['name']

Make sure to replace name with the actual key value you are trying to retrieve from the JSON data.

Answer 5

Answer №3

Utilize the JSON.parse method: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse

client.onreadystatechange = function() {
    if(client.readyState == 4) {
        var jsonData = JSON.parse(client.responseText);
    };
};

It's advisable to encapsulate that within a try, as a precaution in case the server does not return valid json data.

Answer 6

Utilize the JSON.parse method: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse

client.onreadystatechange = function() {
    if(client.readyState == 4) {
        var jsonData = JSON.parse(client.responseText);
    };
};

It's advisable to encapsulate that within a try, as a precaution in case the server does not return valid json data.

Storing JSON information within a variable

Answer №1

Answer №2

Answer №3

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