FastText library JavaScript usage

ft.js

model = "C:\\Data\\fasttext\\wiki\\enwik9.bin";
console.log("Loading file \"%s\"...", model);
fasttext.loadModel(model);
console.log("done.");
console.log("Computing vectors...");
vectors = fasttext.precomputeVectors();
try {
    console.log("done.");
    while (true) {
        positive = prompt('positive words:');
        if (positive == undefined)
            break;
        negative = prompt("negative words:");
        fasttext.nn2(vectors, positive, negative, 5, (word, score) => {
            console.log("\"%s\": %s", word, score);
        });
    }
} finally {
    fasttext.releaseVectors(vectors);
}