var DetectLanguage = require('detectlanguage');

var detectlanguage = new DetectLanguage('YOUR API KEY');

var text = "Hello! How are you?";

detectlanguage.detect(text).then(function(result) {
  console.log(JSON.stringify(result));
});

[
  {
    "language": "en",
    "isReliable": true,
    "confidence": 18.2
  }
]

var texts = ['šešios žąsys', 'Strč prst skrz krk'];

detectlanguage.detect(texts).then(function(result) {
  console.log(JSON.stringify(result));
});

[
  [
    {
      "language": "lt",
      "isReliable": true,
      "confidence": 5.5
    }
  ],
  [
    {
      "language": "cs",
      "isReliable": true,
      "confidence": 3.645
    },
    ...
  ]
]

var text = "Hello! How are you?";

detectlanguage.detectCode(text).then(function(result) {
  console.log(JSON.stringify(result));
});

"en"

detectlanguage.languages().then(function(result) {
  console.log(JSON.stringify(result));
});

[
  {
    code: "aa",
    name: "AFAR"
  },
  {
    code: "ab",
    name: "ABKHAZIAN"
  },
  {
    code: "af",
    name: "AFRIKAANS"
  }
  ...
]

detectlanguage.userStatus().then(function(result) {
  console.log(JSON.stringify(result));
});

{
  date: "2020-01-01",
  requests: 31,
  bytes: 429,
  plan: "FREE",
  plan_expires: null,
  daily_requests_limit: 1000,
  daily_bytes_limit: 1048576,
  status: "ACTIVE"
}