javascript readline

readline.js

  const instream = fs.createReadStream(
    path.join(__dirname, `../reports/trendData`, `${type}.json`)
  );
  const outstream = new stream();
  const rl = readline.createInterface(instream, outstream);
  const labels = [];

  rl.on("line", function(line) {
    labels.push(line.slice(-19, -5));
  });
  const scores = require("../reports/trendData/data/scores.json");
  rl.on("close", function() {
    res.json({ id: type, labels: labels, scores: scores });
  });