danfo.readJSON
Reads a JSON file into DataFrame.
danfo.readJSON(source, options)
Parameters
Type
Description
Default
source
Input file object, string file** **path or URL
Any valid string path is acceptable. The string could be a URL. Valid URL schemes include http, https, ftp, s3, gs, or a local path. Both relative and absolute paths are supported
An input file object is also supported in the browser.
options
Object
Configuration options for reading JSON files. Supported options:
{ method: The HTTP method to use.
headers: Additional headers to send with the request if reading JSON from remote url. Supports all the node-fetch options in Nodejs, and all fetch options in browsers.
}
{ method: "GET" }
The readJSON method can read JSON files from a local disk, over the internet, or directly from input file objects.

Reading JSON files from local disk

Node.js
const dfd = require("danfojs-node")
dfd.readJSON("./user_names.json")
.then(df => {
df.head().print()
}).catch(err=>{
console.log(err);
})

Reading JSON files from a URL

By specifying a valid URL, you can load JSON files from any location:
Node.js
Browser
const dfd = require("danfojs-node")
dfd.readJSON("https://raw.githubusercontentdatasets/master/finance-charts-apple.json")
.then(df => {
df.head().print()
}).catch(err=>{
console.log(err);
})
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/bundle.min.js"></script>
<title>Document</title>
</head>
<body>
<script>
dfd.readJSON("https://raw.githubusercontentdatasets/master/finance-charts-apple.json")
.then(df => {
df.head().print()
}).catch(err=>{
console.log(err);
})
</script>
</body>
</html>

Reading an input file object in the browser

By specifying a valid file object, you can load a JSON file in the browser:
Browser
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/bundle.min.js"></script>
<title>Document</title>
</head>
<body>
<input type="file" id="file" name="file">
<script>
inputFile.addEventListener("change", async () => {
const jsonFile = inputFile.files[0]
dfd.readJSON(jsonFile).then((df) => {
df.print()
})
})
</script>
</body>
</html>
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On this page
Reading JSON files from local disk
Reading JSON files from a URL
Reading an input file object in the browser