ndjson-parse.js

function* parseNdjson(ndjson) {
  let i = 0;
  do {
    const newline = ndjson.indexOf("\n", i);
    const string = newline === -1 ? ndjson.slice(i) : ndjson.slice(i, newline);
    const json = string.trim();
    if (json) {
      yield JSON.parse(json);
    }
    i = newline + 1;
  } while (i > 0);
}