JavaScript Quiz – access JSON string value is possible

Access JSON String Value

JSON stands for JavaScript Object Notation. JSON property can be access but JSON can also convert to string and access is a value like normal JSON not possible.

JSON.stringfy() method is used to convert JSON object to JSON string. Let’s look for basic syntax of JSON stringfy method.

JSON.stringfy()

For more detail about the JSON stringfy method click here.

JavaScript Question

In this javascript quiz, find out does access JSON string value is possible because JSON object property can be access but JSON string value have different case.

First, we declare a variable detail using the let keyword and assign a javascript object to it.

let detail = {name:"JS", last:"startup"};

Now we check the value of property name from detail. We get it’s value “JS”.

console.log(detail.name); // => "JS"

In the next step, we convert JSON object to JSON string using JSON.stringfy() and assign to jsonString variable.

let jsonString = JSON.stringify(detail);

Finally, we are checking the value again and print using console log.

console.log(jsonString.name);

Any idea what should be the value of above code statement.

JavaScript Quiz Test

Here is the full javascript code snippet for you to solve.

let detail = {name:"JS", last:"startup"};

console.log(detail.name); // => "JS"

let jsonString = JSON.stringify(detail);

console.log(jsonString.name);
// output => 🧐 ?

// Made with ❤️, by @jsstartup

Explanation

Now you know the answer is undefined. But why does it should give “js” otherwise something else? Let me explain.

So, it’s easy to access the property of JSON object but when you apply JSON stringfy method then then JSON object convert to string.

Let see the value of jsonString

"{\"name\":\"JS\",\"last\":\"startup\"}"

As you can see it’s a simple string and not an object. And access the property of nothing return undefined.

At last, That’s why we get an answer “undefined“.

Let me know in the comment section, what you think about it.

I hope you understand the concept and logic behind it.

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