How to upload a file to a javascript script

Question

I'm writing a simple JS script which gets a file as input and does some manipulation to it:

node script.js file

The file part is accessed directly by using:

process.argv[2]

Now all i want is given that input, find that file and read it line by line into my function. I have a really hard time with this seemingly simple task since all solutions I found were HTML based.

I need this to run as an independent script.

Possible duplicate of Read a file one line at a time in node.js? — Jon Koops
– Jon Koops, Commented Apr 23, 2018 at 12:04

h1b9b · Accepted Answer · 2018-04-23 12:06:45Z

1

You can do it using fs and readline:

const readline = require('readline');
const fs = require('fs');

const rl = readline.createInterface({
  input: fs.createReadStream(/* Path to your file */),
  crlfDelay: Infinity
});

rl.on('line', (line) => {
  console.log(`Line from file: ${line}`);
});

cf documentation for details, fs & readline

answered Apr 23, 2018 at 12:06

h1b9b

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