It’s also easier to maintain because it doesn’t require all the same tagging as XML. It’s also a lightweight data exchange format and is easier to parse than XML. JSON is a human-readable data format that’s commonly used for transmitting information over a network. In this article, we’ll take a look at how to do exactly that with JavaScript and why it’s important in the process of making your program work. You will often need to find a way to convert things like a CSV file into data structures that your programming language understands.

When working with data, it’s not always the case that you can just open up Microsoft Excel and start writing. In Node.js, it can be parsed with the built-in JSON module from the “standard library” with json = require('json'). JSON is often used for serializing objects for storage or transmission, such as in JavaScript’s response to the fetch API method. It can be used to represent object hierarchies, as well as arrays and scalar values. The parsing is done asynchronously so performance won’t be an issue.JSON is a lightweight data-interchange format that’s used to store numbers and collections of key-value pairs. It returns a promise or emits parsed CSV line by line so we can process them the way we like. With the csvtojson Node package, parsing CSV to JSON is easy.

needEmitAll - the parser will build JSON result if.

It can be 'line' to parse into CSVlines, 'array' to write a complete JSON array downstream

downstreamFormat - option to set what JSON array format is needed by downstream.

nullObject - boolean to indicate whether we keep null or not.

alwaysSplitAtEOL - Boolean to indicate if we split each line by the end of line character.

Index.js const csvFilePath = 'person.csv' const csv = require('csvtojson') (async () => will parse the foo field as a number. Person.csv first_name,last_name john,smith jane,smith We can retrieve a CSV from a file and convert it to JSON or we can get the CSV from a string and do the same thing.įor instance, we can get a CSV from a file and convert it to JSON as follows: This package works with both the browser and Node.js. We can run the following to install it: npm i csvtojson

The csvtojson is available as an NPM module. In this article, we’ll look at how to use the csvtojson module to convert CSV to JSON. Converting CSV to JSON is a task that’s being done a lot as we need to use CSV in our apps.

Javascript csv to json