How To Read json File In JavaScript
Last Updated : Mar 11, 2024
IN - JavaScript | Written & Updated By - Pragati
In this tutorial we will show you the solution of how to read json file in JavaScript, to Read a JSON file first we have to load that file. So, in this session first, we learn about how to load a JSON file and then how to read them.
So, without wasting more time let us understand the example given below.
Step By Step Guide On How To Read json File In JavaScript :-
To load a JSON file into JavaScript, the most used methods are:
- With the help of the fetch() function
- With the help of require() function.
Now, in this tutorial, we are going to understand the first one which is with the help of the fetch() function.
Next, we will learn about another one with the help of require() function. Now, below we are going to show an example in Coding form to get a quick view of the fetch() function.
<!DOCTYPE html>
<html>
<head>
<title>
How to read JSON file in JavaScript
</title>
</head>
<body>
<h1>
TalkersCode – JavaScript Tutorials
</h1>
<h2>
How to read JSON file in JavaScript
</h2>
<script>
fetch("https://jsonplaceholder.typicode.com/todos/1
")
.then(response => {
return response.json();
})
.then(res => console.log(res));
</script>
</body>
</html>- As we see, we write only JavaScript codes in our example today.
- In previous tutorials, we already many times create a full code example in which we first create an HTML form with its basic structure. We use HTML, head, title, body, and script tags inside that structure.
- One thing to note here is that JavaScript codes are always written under the script tag. Whereas the script tag is a paired tag. So, let us see the above codes given in the script tag to see how to read a JSON file in JavaScript.
- Now, as specified above to read a JSON file first we have to load that file inside our codes. To load the JSON files we describe two ways that are given above and from them, we are going to use the fetch() function to load the JSON files.
- Now, inside our codes we see that first we use the fetch function and inside the fetch function we have to give a reference from which we want to fetch JSON data. Here we see that we use JSONPlaceholder which provides fakes for free for practice. Hence, in this, we can able to get fake JSON data for our use.
- At next we just get the response and console the required data that we get from api. One thing to note here that we can also create our own JSON data and fetch it to our JavaScript using fetch() function.
- Hence, in this way we are able to understand two main things. First one is how to load JSON data into our JavaScript and another is how to read JSON data which we done with the help of console.
Conclusion :-
At last, in conclusion, here we can say that with the help of this article we can understand how to read JSON files in JavaScript.
I hope this tutorial on how to read json file in JavaScript helps you and the steps and method mentioned above are easy to follow and implement.
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