LiveVue

Vue inside Phoenix LiveView with seamless end-to-end reactivity.

Features

⚡ End-To-End Reactivity with LiveView
🔋 Server-Side Rendered (SSR) Vue
🐌 Lazy-loading Vue Components
📦 Efficient Props Diffing - Only changed data is sent over WebSocket
🪄 Sigil as an Alternative LiveView DSL
🦄 Tailwind Support
💀 Dead View Support
🦥 Slot Interoperability
🚀 Amazing DX with Vite

Resources

Example

After installation, you can use Vue components in the same way as you'd use functional LiveView components. You can even handle Vue events with JS hooks! All the phx-click, phx-change attributes works inside Vue components as well.

<script setup lang="ts">
import {ref} from "vue"

// props are passed from LiveView
const props = defineProps<{count: number}>()

// local state
const diff = ref(1)
</script>

<template>
  Current count: {{ props.count }}
  <label>Diff: </label>
  <input v-model.number="diff" type="range" min="1" max="10" />

  <button phx-click="inc" :phx-value-diff="diff">
    Increase counter by {{ diff }}
  </button>
</template>

defmodule MyAppWeb.CounterLive do
  use MyAppWeb, :live_view

  def render(assigns) do
    ~H"""
    <.vue count={@count} v-component="Counter" v-socket={@socket} />
    """
  end

  def mount(_params, _session, socket) do
    {:ok, assign(socket, count: 0)}
  end

  def handle_event("inc", %{"diff" => value}, socket) do
    {:noreply, update(socket, :count, &(&1 + value))}
  end
end

Why?

Phoenix Live View makes it possible to create rich, interactive web apps without writing JS.

But once you'll need to do anything even slightly complex on the client-side, you'll end up writing lots of imperative, hard-to-maintain hooks.

LiveVue allows to create hybrid apps, where part of the session state is on the server and part on the client.

Reasons why you'd like to use LiveVue

Your hooks are starting to look like jQuery
You have a complex local state
You'd like to use a massive Vue ecosystem
You want transitions, graphs etc.
You simply like Vue 😉

Installation

See Installation.

Guides

Getting Started

Getting Started - Create your first Vue component with transitions

Core Usage

Basic Usage - Fundamental patterns, ~VUE sigil, and common examples
Configuration - Advanced setup, SSR, and customization options

Reference

Component Reference - Complete syntax documentation
Client-Side API - Vue composables and utilities

Advanced Topics

Architecture - How LiveVue works under the hood
Testing - Testing Vue components in LiveView
Deployment - Production deployment guide

Help & Troubleshooting

FAQ - Common questions and comparisons
Troubleshooting - Debug common issues
Comparison - LiveVue vs other solutions

Relation to LiveSvelte

This project is heavily inspired by ✨ LiveSvelte ✨. Both projects try to solve the same problem. LiveVue was started as a fork of LiveSvelte with adjusted ESbuild settings, and evolved to use Vite and a slightly different syntax. I strongly believe more options are always better, and since I love Vue and it's ecosystem I've decided to give it a go 😉

You can read more about differences between Vue and Svelte in FAQ.

LiveVue Development

Local Setup

Ensure you have node installed. Clone the repo and run mix setup. You can then run mix assets.watch to start a watcher for the assets.

Example Project

You can use /example_project as a way to test live_vue locally.

Clone this repo
Go to example_project dir
Run mix setup
Run mix phx.server to start the server
Open http://localhost:4000 in your browser

Building Static Files

LiveVue is written in TypeScript. To see the changes you made, you have to recompile the assets. You can do it with:

mix assets.build

Or run the watcher:

mix assets.watch

Releasing

Release is done with expublish package.

Write version changelog in untracked RELEASE.md file
Update version in INSTALLATION.md

Run

git add INSTALLATION.md
git commit -m "INSTALLATION version bump"

# to ensure everything works fine
mix expublish.minor --dry-run --allow-untracked --branch=main

# to publish everything
mix do assets.build, expublish.minor --allow-untracked --branch=main

Roadmap 🎯

[x] useLiveEvent - an utility automatically attaching & detaching handleEvent
[x] ~~optimize payload - send only json_patch diffs of updated props~~ ✅ Done!
[ ] shared props automatically included in all components
[ ] VS code extension highlighting ~VUE sigil
[ ] try to use Igniter as a way of installing LiveVue in a project
[ ] usePushEvent - an utility similar to useFetch making it easy to get data from &handle_event/3 -> {:reply, data, socket} responses
[ ] useLiveForm - an utility to efforlessly use Ecto changesets & server-side validation, similar to HEEX
[ ] Add support for Phoenix streams as props

Credits

LiveSvelte

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