How to read a json file in javascript

Reading a Local File from the Browser The FileReader object, a relatively recent addition to HTML5 and JavaScript, allows you to read files stored locally on your computer directly into JavaScript running in a browser, without the need to first upload it to a server.

When changed, file inputs produce a FileList object this. Show comments Leave a Reply Cancel reply Your email address will not be published. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Close Privacy Overview This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website.

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Necessary Necessary. In the above code, we are loading json from harddisk, which is an asynchronous operation and thus it needs to specify a callback function to execute after the file is loaded. In the above code, we are using fetch API, and passing location in fetch, once we have got the response, we are using console. Suppose, we simply want to get the "title" value from above JSON, then we can print it as below.

Although with the above examples, I have mentioned how we can parse JSON in javascript, here is the simple example of it. Best Javascript Drag and Drop Libraries. It is actually just loading another javascript file which stores some hardcoded json as a variable named data. If you removed the string quotes from around the json in data. It does not work for me, or I don't know how to make use of the above information.

Show 8 more comments. Billal Begueradj Stano Stano 7, 6 6 gold badges 27 27 silver badges 41 41 bronze badges. This is a very bad practice! Look up CORS. This only works because javascript is doing stuff in the background to make your code not die. Should read as follows: rawFile. You can also set rawFile. Show 1 more comment. A workaround is to run a local webserver, serve up the file and make the AJAX call to localhost. Chris Pickford Chris Pickford 8, 5 5 gold badges 43 43 silver badges 70 70 bronze badges.

Could you please guide me how I can run a local server in this case? What do I need to do in order to get the local server run?

What environment are you using? The question did not ask about AJAX. To update geotheory's comment, with Python 3 the command is python -m http. Yordan Georgiev 4, 1 1 gold badge 45 45 silver badges 52 52 bronze badges. Not true! Javascript has no require built in — user PauliSudarshanTerho Thx, you're right! Using the Fetch API is the easiest solution: fetch "test. Alex Glinsky Alex Glinsky 2, 1 1 gold badge 15 15 silver badges 14 14 bronze badges. First, create a json file.

In this example my file is words. Zelo 70 1 1 silver badge 6 6 bronze badges. Using require you can include modules that exist in separate files. The basic functionality of require is that it reads a javascript file, executes the file, and then proceeds to return the exports object — Syed Ayesha Bebe.

This answer does not show how to load a file using Vanilla Javascript, but how to do so using Node. Serhan C. Then how can you import dynamic json file? I think you can only import json files only when you are in development mode by your method. You are right. I only answered considering that question. The file selected. Franco Gil 95 1 1 silver badge 7 7 bronze badges. Sarah Sarah 3 3 silver badges 9 9 bronze badges.

In this case, the user has to select the file themselves because of the CORS policy, which basically prevents the developer of the web page from grabbing data they're not supposed to ex. I could take their private files, I could make a GET request to a potentially bad script and run it without the user's permission. The CORS policy makes this kind of stuff a pain to deal with without any kind of backend, but it makes the user safer.

If you wanted to actually open a file, you'd have to run a web server which can manage those requests.