Intro

Install

Syntax

import { LineReader } from "line-reader-browser"
// file is javascript File Object returned from input element
// chunkSize(optional) is number of bytes to be read at one time from file. defaults to 8 * 1024
const file: File
const chunSize: number
const lr = new LineReader(file, chunkSize)
// context is optional. It can be used to inside processLineFn 
const context = {}
lr.forEachLine(processLineFn, context)
 .then((context) => console.log("Done!", context))
// context is same Object as passed while calling forEachLine
function processLineFn(line: string, index: number, context: any) {
 console.log(index, line)
}

Usage (in TypeScript)

import { LineReader } from "line-reader-browser"
document.querySelector("input").onchange = () => {
 const input = document.querySelector("input")
 if (!input.files.length) return
 const lr = new LineReader(input.files[0], 4 * 1024)
 lr.forEachLine((line: string, i) => console.log(i, line)).then(() => console.log("Done!"))
}

Example