Creating a JSON object using an input variable

Question

Creating a JSON object using an input variable

My goal is to create a JSON object using input variables from two fields. Upon clicking a button, I want to capture the input values and use them to construct a JSON object accordingly. However, I am encountering issues with successfully creating the JSON object with the entered values.

Initially, I attempted the following:

// Fetching the input values as variables
let id=document.querySelector("#id");
let title=document.querySelector("#title");

Firstly, I tried the code snippet below. Unfortunately, it resulted in an empty value rather than the expected string:

var vObj = '{"id":' + id.value + ',"title":' + title.value + '}'

Another approach I experimented with was:

var vObj = {"id":{}, "v_title":{}, "v_category":{}};
vObj.id = id.value;
vObj.title = title.value;

Furthermore, I tested the following code snippet:

let asd = id.value;
let bsd = title.value;

var vObj = {id:asd, title:bsd}

Unfortunately, this also returned an empty value instead of the desired variable value.

Upon further investigation, I discovered that there was a typographical error in the button trigger which may have been causing these issues. My apologies for overlooking this mistake.

javascript json

Answer 1

Answer №1

To generate valid JSON, start by creating an object with specific properties and then utilize the JSON.stringify method:

//let id = document.querySelector("#id").value;
let id = 'my_id';
//let title = document.querySelector("#title").value;
let title = 'my_title';
console.log('ID: ' + id);
console.log('Title: ' + title);

var vObj = { id: id, title: title };
var json = JSON.stringify(vObj);
console.log(json);

The following line of code:

var vObj = { id: id, title: title };

Defines an object with an id property that holds the value of the id variable, along with a title property holding the value of the title variable.

This line of code:

var json = JSON.stringify(vObj);

Converts the object vObj into a JSON string.

Output:

ID: my_id
Title: my_title
{"id":"my_id","title":"my_title"}

Further clarification based on @FelixKling's feedback

In ES6, you can simplify the declaration of the vObj object using:

var vObj = {id, title};

This will create the same object but assumes properties named id and title. If your variables have different names, this shorthand will not apply.

Answer 2

To generate valid JSON, start by creating an object with specific properties and then utilize the JSON.stringify method:

//let id = document.querySelector("#id").value;
let id = 'my_id';
//let title = document.querySelector("#title").value;
let title = 'my_title';
console.log('ID: ' + id);
console.log('Title: ' + title);

var vObj = { id: id, title: title };
var json = JSON.stringify(vObj);
console.log(json);

The following line of code:

var vObj = { id: id, title: title };

Defines an object with an id property that holds the value of the id variable, along with a title property holding the value of the title variable.

This line of code:

var json = JSON.stringify(vObj);

Converts the object vObj into a JSON string.

Output:

ID: my_id
Title: my_title
{"id":"my_id","title":"my_title"}

Further clarification based on @FelixKling's feedback

In ES6, you can simplify the declaration of the vObj object using:

var vObj = {id, title};

This will create the same object but assumes properties named id and title. If your variables have different names, this shorthand will not apply.

Answer 3

Answer №2

To begin, start by creating a new object and then converting it to a JSON string.

var json = JSON.stringify({ "id": id, "title": title });

Answer 4

To begin, start by creating a new object and then converting it to a JSON string.

var json = JSON.stringify({ "id": id, "title": title });

Creating a JSON object using an input variable

Answer №1

Answer №2

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