如何跳过 Node.js readline 中的第一行？

Question

I want to read a file and skip its first line in an async function. I've tried rl.next() and rl.once('line',()=>{}) , and those don't work. How to skip the first line?

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

async function readfile(filename){
  const rs = fs.createReadStream(filename);
  const rl = readline.createInterface({input: rs});
  // not working: rl.next(), or rl.once('line',()=>{})
  for await (const line of rl) {

  }
}

Related question: the document says rl is an AsyncIterator , why doesn't it have a next() method?

Answer 1

To keep it easy:

async function readfile(filename){
  const rs = fs.createReadStream(filename);
  const rl = readline.createInterface({input: rs});

  let index = 0;
  for await (const line of rl) {
     if (index === 0 {
        continue;
     }
      
     // do what you have to do
     
     index++;
  }
}