Termy.js

An easily customisable web terminal interface built with JavaScript for menus, tutorials, games, and more!

Usage

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To use Termy, simply download termy-1.0.min.js (found in the dist folder) and the dependencies folder with all its contents (jquery-3.3.1.min.js, typed-2.0.6.min.js and autosize-4.0.0.min.js) - then include the JS files in the element of your file, and you're good to go:

<script src="dependencies/jquery-3.3.1.min.js"></script>
<script src="dependencies/typed-2.0.6.min.js"></script>
<script src="dependencies/autosize-4.0.0.min.js"></script>
<script src="termy-1.0.min.js"></script>

(Yes, of course you can optionally use a CDN instead of the provided jQuery, typed.js and Autosize files!)

Now that you've got the scripts, you can customise it as you like. If, instead of filling the entire page, you wanted Termy to be in a single element of the page, give that element the termy class, like so:

<div class="termy"></div>

There are also 3 settings in the termy-1.0.min.js file you can modify. Open up the file, and you'll see that there is a custom object up the top, with the minified Termy beneath. Within this object, there is another, settings, object. There, you have 3 options (currently set to the default settings) - you can take advantage of them, or if you don't want to use them, completely remove the settings object:

settings: {
  // user and host names
  // below settings will set it to [email protected]
  // if the window hostname is undefined, it'll show as [email protected]
  user: 'visitor',
  host: window.location.hostname || 'example.domain',
  // colour of the ~$
  promptColour: '#00f',
},

(You'll see that below the settings object is the commands object - see the adding custom commands section for more info on that.)

Default Commands

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The core commands of Termy are help - display all available commands, man - show detailed information about commands, clear - remove all previously run commands from the terminal and exit - logs out, to execute commands afterwards the page must be reloaded.

There are also 3 "custom commands" included to serve as examples: time - display the current time, 8ball - gives a random response to the input and google - google the command arguments.

(Hey! I've added a little easter egg to the custom commands - see what you can do with it!)

Adding Custom Commands

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Adding your own commands to Termy is simple. Open up the termy-1.0.min.js file and go the the commands object (it's inside the custom object up the top). You'll see that there are a few already there - those are the ones mentioned in the default commands section. Here's an example command:

// command name - STRING
hello: {
  // command description - STRING
  description: 'says hello.',
  // arguments to show as usage - STRING
  usage: '<required - my name> [optional - your name]',
  // extra information to show when the man command is run - STRING
  info: 'Just an example command.',
  // whether or not to hide the command in the help menu - BOOLEEN
  hidden: false,
  // whether or not the command uses Typed.js and prepares the prompt for
  // the next command itself - BOOLEEN
  typed: false,
  // run - FUNCTION
  run: (args) => {
    if (args[0]) {
      if (args[0] === 'Termy') {
        if (args[1]) {
          $(`${container} .${commandCount - 1}`).append(`Hello ${args[1]}!`);
        } else {
          $(`${container} .${commandCount - 1}`).append('Hello!');
        }
      } else {
        $(`${container} .${commandCount - 1}`).append('That\'s not my name!');
      }
    } else {
      $(`${container} .${commandCount - 1}`).append('<span style="color: #f00">ERROR</span>: this '
        + 'command should be executed as <i>hello &lt;required - my name&gt; [optional - your name]</i>');
    }
  }
},

Just like that, you've added a command called hello:

• when you run hello, it will reply ERROR: this command should be executed as hello <required - my name> [optional - your name],

• when you run hello someone, it will reply That's not my name!,

• when you run hello Termy, it will reply Hello!,

• and when you run hello Termy Me, it will reply Hello Me!.

description, usage and info are shown by the help and man commands.

If hidden is set to true, then the command will be overlooked by the help and man commands.

If typed is set to true, then you must handle preparing the prompt for the next command yourself (neccessary if you use Typed.js in the command). This is done like so:

To animate the appearance of text, Termy uses Typed.js. So that all text appears and stays in the right place in the terminal, this is how it should be run:

// Just an example variable - change it to whatever you wish, but make sure to change it in the strings setting below too.
var string = 'whatever it is you want to type'; 
new Typed('.typed', {
  strings: [string],
  typeSpeed: -100,
  showCursor: false,
  onComplete: function (self) {
    $('.typed').empty();
    $('#' + (commandCount - 1)).append(string);
    command = '';
    displayPrefix();
  }
});

Now that the command has been registered with Termy, adding functionality is easy. Just scroll to the bottom of the page to the custom commands section - where you can see time, 8ball and google already are. To add functionality to your own command, just create a function named the name of your command.

// Adds functionality for the command named dosomething
function dosomething(args){ // args argument contains all words input after.
  $('#' + (commandCount - 1)).append('something'); // Adds the word something to the terminal.
}

When adding text to the terminal, always either use the Typed.js method demonstrated above, or append text to the $('#' + (commandCount - 1) element like it is done here.

Other Details

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Termy was originally made as a 2017 Christmas gift to the community, inspired by https://host01.th3f.de/ during some random browsing. It is released under the MIT License.