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nodejs/read_child_process_lines.js

This example reads lines from a child process one by one, as soon as lines become fully available. Related:

stackoverflow.com/questions/9781214/parse-output-of-spawned-node-js-child-process-line-by-line canon
- stackoverflow.com/questions/14332721/node-js-spawn-child-process-and-get-terminal-output-live/77423073#77423073 answered big superset
- stackoverflow.com/questions/12955154/nodejs-read-and-parse-each-line-of-stdout duplicate

nodejs/read_child_process_lines.js

#!/usr/bin/env node
const childProcess = require('child_process')
const readline = require('readline')
const p = childProcess.spawn('./count.js', ['2'])
;(async function() {
const rl = readline.createInterface({ input: p.stdout })
for await (const line of rl) {
  console.log(line)
}
})()

 Ancestors