Just in case someone stumbles upon here in future
Node 11.7 added support for this using async await
const readline = require('readline');
//const fileStream = fs.createReadStream('input.txt');
const rl = readline.createInterface({
input: process.stdin, //or fileStream
output: process.stdout
});
for await (const line of rl) {
console.log(line)
}
Remember to wrap it in async function(){}
otherwise you will get a reserved_keyword_error.
const start = async () =>{
for await (const line of rl) {
console.log(line)
}
}
start()
To read an individual line, you can use the async
iterator manually
const it = rl[Symbol.asyncIterator]();
const line1 = await it.next();