mj-node-simple.js

"use strict";
var mjAPI = require("./lib/main");
var fs = require('fs');

var inputFile = "file.txt"; // use xargs or something
var output = [];
var array = fs.readFileSync('file.txt').toString().split("\n");

mjAPI.start();

for (var i = 0; i < array.length; i++) {
  let index = i;
  mjAPI.typeset({
    math: array[index],
    format: "TeX",
    mml: true
  }, function(data) {
    var e = data.errors;
    if (e) {
      output.push(e);
    }
    if ( (index+1) === array.length){
      console.log('Results: ' + output.join('\n'));
    }
});
}