readable.js

const fs = require("fs");

const reader = fs.createReadStream("./foo.txt");

reader.on("open", () => {
  console.log("file opened!");
  reader.pause()
  setTimeout(() => {
    reader.resume()
  }, 3000) // wait for 3 seconds before 
});

reader.on("data", (chunk) => {
  console.log("got some data: ", chunk.toString());
});

reader.on('pause', () => {
  console.log('stream paused!');
})

reader.on('resume', () => {
  console.log('stream in flowing mode!');
})

reader.on("end", () => {
  console.log("stream ended!");
});

reader.on("close", () => {
  console.log("stream closed!");
});