npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@just-web/commands

v7.2.4

Published

just-web command system

Downloads

30

Readme

@just-web/commands

NPM version NPM downloads

@just-web/commands provides mechanism to register and invoke commands.

Commands are basically functions. There are a few situations to use commands over functions:

  • Type-safe: the signature of the command is defined when the command is created. This means they are more similar to signals then events.
  • Polymorphic: command can be defined by a higher-level module, and implement by a lower-level detail module. Allows you to handle the same command differently depending on the environment and condition.
  • Menu, Command Palette, Keyboard shortcuts: along with @just-web/keyboard, commands can be displayed and invoked in different ways.
  • Cross-boundary: command can be invoked by different modules, without directly depends on the defining module (*1)
  • Tracking: execution of commands are tracked. They are logged at logLevels.trace.
  • Dynamic dispatch: command type is a string, meaning you can dynamically construct it and invoke the command. This is useful for free from or user-based input. The command provides helper functions.

*1: while this is possible, you do lose the ability of using the helper functions (if provided by the defining module). You will need to invoke the command by the command name directly, and implicitly know the signature of the command. This is a classic case of strongly type limitation.

Install

# npm
npm install @just-web/commands

# yarn
yarn add @just-web/commands

# pnpm
pnpm install @just-web/commands

#rush
rush add -p @just-web/commands

command

To create a command, you use the command() function.

The basic way to use it is passing in an id and a handler:

const singCommand = command('party.sing', (songName: string) => sing(songName))

singCommand('Dancing Queen')

You can also separate the declaration of the command and the implementation by specifying the type and omit the handler:

const singCommand = command<(name: string) => void>('party.sing')

// in another file or package
singCommand.defaultHandler((name) => sing(name))

However, its true power is when you use it with @just-web.

import { define } from '@just-web/app'
import { command, type CommandsGizmo } from '@just-web/commands'
import { type KeyboardGizmo } from '@just-web/keyboard'
import { extractFunction } from 'type-plus'

export const singCommand = command<(songName: string) => void>('party.sing')
export const danceCommand = command({
    id: 'party.dance',
    description: `World's End Dancehall`,
    key: 'ctrl+d'
  },
  (danceNumber: string) => dance(danceNumber)
)

const partyPlugin = define({
  static: define.require<CommandsGizmo>().optional<KeyboardGizmo>(),
  async create(ctx) {
    singCommand.connect(ctx, (songName) => sing(songName))
    danceCommand.connect(ctx)

    return {
      party: {
        sing(songName: string) {
          singCommand(songName)
        },
        // yes, this will work, since the command is connected.
        // the `extractFunction()` extracts the function signature from the command.
        dance: extractFunction(danceCommand)
      }
    }
  }
})

In the example above, you can see that the command() function also accepts an info object, which includes additional information about the command, including key bindings.

Then within the gizmo, you can connect the command to an application by calling the connect() function.

This enables the tracking, key bindings, and command palette support for the command.

You can also expose the command within the gizmo by wrapping (as in the sing() example), or by using the extractFunction() function from type-plus.