All we need to do is hook into the Socket.io client's message event and format the data appropriately for output. An example of a web server written with Node. Now the client needs a way to receive messages. node options V8 options script.js -e 'script' - arguments Please see the Command-line options document for more information. The nickname is prepended to the emote in a way that should be familiar to anyone who has used IRC or played a multiplayer roleplaying game, then it's pushed to the server. The emote command is used in the form of /me is eating second breakfast. A more robust server could be more discrete. Admittedly, our overly simple server will blindly push the message out to everyone, but the client will ignore tells that aren't addressed to the correct nickname. readline repl report stream stream/web stringdecoder test timers tls traceevents tty url util v8 vm wasi workerthreads. This will be displayed a bit differently than a normal message and should not be visible to other users. If the user types /msg bilbo Where is the precious?, the same regex is used to separate the recipient and the message, then an object with the type of tell is pushed to the server. ![]() If the user types /nick gollum, the nick variable is reset to be gollum, where it might have been smeagol before and a notice is pushed to the server. ![]() Rl.question("What is your name? ", function(answer) ) Ĭonsole_out("That is not a valid command.") Var rl = readline.createInterface(process.stdin, process.stdout) This is probably the simplest usage of Readline: var readline = require('readline') The client will not only send simple messages, but have commands for emotes with /me, private messages with /msg, and allow for nicknames to be changed with /nick. In other words, TypeScript is also NodeJS so you can use any NodeJS module in TypeScript including the readline module. At the end, your TypeScript code once compiled will generate NodeJS code. The syntax for including the Readline module in your application: var. ![]() In this tutorial, I intend to show off the capability of Readline and make a real-time CLI chatroom backed by Socket.io. Accepts an options Object that takes the following values: input - the readable stream to listen to (Required). FredDanna You're right but TypeScript is just a language which adds a layer over NodeJS code to add things like type checks. The Readline module provides a way of reading a datastream, one line at a time. This can be used to ask the user a question or two, or to create a prompt at the bottom of the screen. The Readline module does what it says on the box: it reads a line of input from the terminal. Node.js has an under-appreciated module in its standard library that is surprisingly useful.
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