Obtain a particular value from a JSON file using JavaScript

Question

Obtain a particular value from a JSON file using JavaScript

My JSON file, named json.json, contains the following data:

{"name1":"Hallo","name2":"Defy","name3":"Carm","name4":"Disney"}

To read this file, I am using the following script:

<script type='text/javascript'>
$(window).load(function(){
$.getJSON("json.json", function(person){
$.each(person, function(key, value)
{document.write(key+"= "+value+"<br />"); 
});
});
});
</script>

Although this script displays all the data, I only want to store the value of "name3" in +value+

What modifications should I make to accomplish this?

javascript json

Answer 1

Answer №1

Instead of iterating through, you can simply do this:

$.getJSON("data.json", function(user){
    document.write("username: " + user.username);
});

It might be better to avoid using document.write and instead append the result to a specific container.

<div id="output"></div>

$.getJSON("data.json", function(user) {
    $("#output").append("<p>Username: " + user.username + "</p>");
});

Answer 2

Instead of iterating through, you can simply do this:

$.getJSON("data.json", function(user){
    document.write("username: " + user.username);
});

It might be better to avoid using document.write and instead append the result to a specific container.

<div id="output"></div>

$.getJSON("data.json", function(user) {
    $("#output").append("<p>Username: " + user.username + "</p>");
});

Answer 3

Answer №2

$.getJSON is a handy method that fetches JSON data and returns it as a JavaScript object.

If you want to access the name3 property from the retrieved object, you can easily do so using the following code snippet:

$.getJSON("data.json", function(user){
    // manipulate user.name3 as needed...
    console.log(user.name3);
}

Answer 4

$.getJSON is a handy method that fetches JSON data and returns it as a JavaScript object.

If you want to access the name3 property from the retrieved object, you can easily do so using the following code snippet:

$.getJSON("data.json", function(user){
    // manipulate user.name3 as needed...
    console.log(user.name3);
}

Answer 5

Answer №3

If you want to access the property, simply use a dot "." notation. For example, to retrieve the value of name3, you would write value.name3.

If you only have one item, there's no need for a foreach loop.

<script type='text/javascript'>
    $(window).load(function(){
        $.getJSON("json.json", function(person){
            document.write(key + " = " + value.name3 + "<br />"); 
        });
    });
</script>

Answer 6

If you want to access the property, simply use a dot "." notation. For example, to retrieve the value of name3, you would write value.name3.

If you only have one item, there's no need for a foreach loop.

<script type='text/javascript'>
    $(window).load(function(){
        $.getJSON("json.json", function(person){
            document.write(key + " = " + value.name3 + "<br />"); 
        });
    });
</script>

Obtain a particular value from a JSON file using JavaScript

Answer №1

Answer №2

Answer №3

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