Simple script for fetch and save the word definition to local html file in console

package.json

{
  "dependencies": {
    "async": "^0.9.0",
    "cheerio": "^0.19.0",
    "datauri": "^0.6.0",
    "unirest": "^0.4.0"
  }
}

save-dict.js

var fs      = require('fs');
var url     = require("url");
var path    = require('path');
var cheerio = require('cheerio');
var unirest = require('unirest');
var datauri = require('datauri');
var async   = require('async');

var inputWord  = process.argv[2] || 'a';
var nextWord   = "";
var getWordURL = function(word) {
    return 'http://www.onlinedict.com/servlet/MobiDictLookup14?WoRd=' + encodeURIComponent(word) + '&example=true&phrase=true&from=prev';
}

async.waterfall([
    function(callback) {
        unirest
            .get(getWordURL(inputWord))
            .header('User-agent', 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36')
            .end(function(response) {
                callback(null, response);
            });
    },
    function(response, callback) {
        var $     = cheerio.load(response.body);
        var table = $("table tr:nth-child(2) td");

        // Remove 4 links
        table.find("tr[bgcolor=moccasin] td[align=center] a").each(function() {
            $(this).remove();
        });

        // Get next word
        nextWord = table.find("tr:nth-last-child(5) td a").html();

        // Remove "looking for" keyboard
        table.find("tr:first-child").remove();

        // Remove last 3 lines
        for(var i=0; i<5; i++) {
            table.find("tr:last-child").remove();
        }

        // If found PREVIOUS WORD tr, remove again
        if (table.find("tr:last-child td").text().indexOf("PREVIOUS WORD") == 0) {
            table.find("tr:last-child").remove();
        }

        callback(null, $, table);
    },
    function($, table, callback) {
        var images = [];
        table.find("tr:nth-child(2) td img").each(function() {
            var image_url = url.resolve("http://www.onlinedict.com/", $(this).attr('src'));
            var image_ext = path.extname($(this).attr('src'));

            images.push({
                'url': image_url,
                'ext': image_ext,
            });
        });

        callback(null, $, table, images);
    },
    function($, table, images, waterfallCallback) {
        var image_uris = [];
        async.eachSeries(images, function(image, callback) {
            unirest
                .get(image.url)
                .encoding(null)
                .end(function(response) {
                    var uri     = new datauri();
                    var format  = uri.format(image.ext, new Buffer(response.raw_body));

                    image_uris.push(format.content);

                    callback(null);
                });
        }, function(err) {
            waterfallCallback(null, $, table, image_uris);
        });
    },
    function($, table, image_uris, callback) {
        table.find("tr:nth-child(2) td img").each(function(i) {
            $(this).attr('src', image_uris[i]);
        });

        callback(null, table);
    }
], function(err, result) {
    fs.writeFile("./" + inputWord + ".html", result.html(), function(err) {
        if (err) {
            console.log(err);
        }else{
            console.log('OK. Next word: ' + nextWord);
        }
    });
});