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mews v1.2.2

trust your output to a mews


trust your output to a mews

NPM Build Status

mews are intended to make sending messages on Slack, Telegram, and Twitter as easy as using console.log.

const mews = require('mews')
let mew = mews.telegram(apiToken, chatID)

mew(`Warning: ${name} is a cutie!`)

More information about supported services is available below.

Using mews

This package is a collection of mews (though I've actually only written two so far). You start by plucking the mew that you want to use off of the mews module:

let mew = mews.telegram
// continued below

Now that you have a mew, you need to pass it configuration arguments. These are usually pesky (but important) required details like API keys and an identifiers for your recipients. mews are functions, so you just call them as you would any other function.

// continued from above
mew = mew(apiToken, chatID)
// continued below

At this point, your mew becomes a complete, fully grown mew. Complete mews work exactly like console.log does for your program output, which means that you can pass it multiple arguments, objects, or even format strings!

// continued from above
mew('%s: Found %d new cuties!', Date(), count)

Building mews

Each mew is actually a curried function. Officially, curried functions are weird monstrosities made of lots of little functions, but as far as we're concerned, they're just really lenient functions that are okay with not getting enough arguments. Where most functions will kick and scream at you, these just give you new functions that remember the arguments you've already provided.

A freshly plucked mew will first take in all the configuration arguments it needs (across multiple calls, if necessary), and if there are any left over, the rest will be treated as output. After that happens, you'll just keep getting back additional complete mews that treat all their arguments as output.

These are all valid ways to send the same message over Telegram:

let mew = mews.telegram(apiToken, chatID, 'Nyan~')
let mew = mews.telegram(apiToken)
mew = mew(chatID, 'Nyan~')
let mew = mews.telegram(apiToken)
mew = mew(chatID)

While that last one may seem amewsingly verbose, it still has its uses! For example, if you wanted to send notifications to two people using the same bot, you might do something like this:

let telegramFor = mews.telegram(apiToken)
let myMew = telegramFor(myself)
let friendMew = telegramFor(myFriend)

myMew('Reminder: Buy more pudding.')
friendMew("Hey there, cutie~ How are you today?")

Configuring mews

If you want to do more complicated things, mews are also configurable. For example, the log mew usually outputs messages to STDOUT, but you can use the .err simple property to switch over to STDERR:

let mew = mews.log
mew.err("Error error! Time to panic nyow!")

Properties can go anywhere. Simple properties like .err simply return a new mew. You generally wouldn't use a simple property multiple times, but this is completely valid:

let mew = mews.telegram.noNotify // noNotify on
mew = mew.noNotify(apiToken) // noNotify off
mew = mew(chatID).noNotify // noNotify on
mew("Psst! You won't get notified about this message.")

Complex properties are a little scarier, since they modify your current mew.

let mew = mews.telegram(apiToken, chatID)
mew.reply_markup = JSON.stringify({force_reply: true})
mew(`"Meow" you're in reply mode!`)

It's okay, though, because if you use them as simple properties, they'll usually give you a new mew with that setting reset to default.

let mew = mews.telegram(apiToken, chatID)
mew.reply_markup = 'Oh no! This is invalid!'
mew = mew.reply_markup
mew('I fixed it!')

If all this configuration stuff is too confusing, don't worry about it! You can use mews without worrying about configuring anything at all. Most of the time they're just there for completeness.


Please note that this and all other mews are curried functions, as stated above. Calls always return a partially applied mew remembering provided arguments other than the ones in ...output.

mew = mews.log(...output)

Proof of concept mew that just calls console.log.

  • ...output Desired output.


  • mew.err toggle. Print output to STDERR instead of STDOUT.
  • mew.error alias. mew.err
let mew = mews.log
mew('Normal log message') // STDOUT
mew.err('Error message') // STDERR


mew = mews.slack(apiToken, details, ...output)

Sends a message over Slack. The simplest way to use this is simply providing a channel name as details.

  • apiToken string. A Slack API token. Only tested with the ones provided by Slack Bots, but any other Slack API Token will probably work too.
  • details This can be an object or string.
    • string. A shortcut for setting the channel property below.
    • object. The only required property is channel. See below for interactions between properties.
      • channel string. The channel you would like to send your message to. Include a @ before usernames to send a DM. You may optionally include a # before channel names. This is required.
      • name string. A sender name for your message.
      • icon string. A url to an image file to be used as your message's icon.
      • emoji string. A Slack emoji to be used as your message's icon. Colons are required.
  • ...output Desired output.

Providing a string as details is equivalent to providing an object with only a channel property. If you do this, your bot (or whatever entity your API token corresponds to) must be in the channel specified. If you specify any of the other properties, this is not required.


  • mew.noParse toggle. Disables the full parse mode. This allows you to use Slack's formatting spec.
  • mew.link_names toggle. Enables channel and username auto-linking. This is only useful when used with noParse, because the full parse mode does this by default.
  • mew.attachments = '' string. A json string following Slack's attachment spec.
  • mew.noPreview toggle. Disables all link previews.
let mewWithToken = mews.slack(apiToken)
let mew = mewWithToken(channel)
mew('This is a normal, fully parsed message that shows link previews.')
mew.noParse('<|This syntax> is difficult to use.')

mew = mewWithToken({channel, name: 'Yummy', emoji: ':strawberry:'})
mew('My name is Yummy and I have a strawberry as an icon.')


mew = mews.telegram(botToken, chatID, ...output)

Send a message to the account with chatID from the bot with given botToken. Requires the recipient to have messaged the bot at least once.

  • botToken string. Your telegram bot's API token. BotFather will tell give you this when you create a bot or use the /token command.
  • chatID string. Your recipient's chat ID, which is usually a positive integer for users, a negative integer for groups, or a name for channels.
  • ...output Desired output.


  • mew.markdown toggle. Switch on markdown parsing mode. Please note that the "markdown" supported by this mode is simplified from normal markdown: *bold* _italic_
  • mew.html toggle. Switch on HTML parsing mode, which supports a subset of tags: <b> <i> <a href=""> <code> <pre>
  • mew.noPreview toggle. Disable link previews.
  • mew.noNotify toggle. Disable notifications for message.
  • mew.reply_markup = '' string. Configure reply_markup request variable, typically for controlling how a user would reply to your message.
  • mew.disable_web_page_preview alias. mew.noPreview
  • mew.disable_notification alias. mew.noNotify
  • mew.parse_mode = '' string. Actual parse_mode variable as sent in request to Telegram. mew.markdown and mew.html modify this variable for you so you don't have to.
let mew = mews.telegram(botToken, chatID)
let mdn = mew.markdown('[With preview](') // Markdown
mdn.noPreview('[No preview](') // Markdown & noPreview

let rpy = mdn() // Clone mdn => rpy
rpy.reply_markup = JSON.stringify({force_reply: true}) // Modify rpy
rpy(`_Meow_ you're in reply mode!`) // Markdown & force_reply


mew = mews.twitter(consumer_key, consumer_secret, token, token_secret, ...output)

Send a tweet on twitter with the provided app and account details. You can grab some from Twitter's Application Management site.

  • consumer_key string. Twitter app consumer key (api key)
  • consumer_secret string. Twitter app consumer secret (api secret)
  • token string. Twitter user access token
  • token_secret string. Twitter user access token secret
  • ...output Desired output.


  • mew.sensitive toggle. Flags your tweet as potentially containing sensitive content.
  • mew.replyTo = '' string. The ID of a tweet you would like to reply to. This doesn't do anything unless your tweet text contains @username, where username is the username of the account that tweeted the tweet.
  • = '' string. If this is set, your message will be sent as a DM to a recipient specified by this value. If this value contains only digits, it will be treated as a user ID. If it contains anything other than digits, it will be considered a username. You must include a @ before a username that is all digits (to differentiate it from a user id), but it's optional otherwise.
  • mew.in_reply_to_status_id alias. mew.replyTo
  • mew.possibly_sensitive alias. mew.sensitive
let mew = mews.twitter(cKey, cSecret)
mew = mews.twitter(token, tSecret)

mew('This is a tweet.')
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