The combination of Vue.js and Elixir language to implement real-time chat and communication applications

The combination of Vue.js and Elixir language realizes the implementation method of real-time chat and communication applications

Introduction:
In today's Internet era, real-time chat and communication have become indispensable in people's lives and work missing part. In order to achieve high-performance and reliable real-time communication applications, we can combine Vue.js and Elixir languages ​​and take advantage of the advantages of both. This article will introduce how to use the Vue.js front-end framework and Elixir's Phoenix framework to develop a real-time chat and communication application, and provide corresponding code examples.

Part One: Project Overview
Before we begin, let us first understand the basic functions and architecture of the real-time chat and communication application we want to implement.

1. Basic functions:
2. User registration and login
3. Send and receive real-time chat messages
4. View chat history
5. Architecture:
   We use Vue.js as the front-end framework, which is responsible for handling user interaction and data display; while Elixir's Phoenix framework is responsible for handling back-end logic and real-time communication.

Part 2: Front-end Implementation
In the front-end part, we will use Vue.js to implement user interaction and data display. First, we need to install Vue.js and its related plug-ins.

1. Install Vue.js:
   Open the terminal and execute the following command to install Vue.js:

   $ npm install vue

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2. Create a Vue.js application:
   Enter the following command in the terminal to create a new Vue.js application:

   $ vue create realtime-chat

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3. Write the Vue component (Chat.vue):
   Open src/components#Chat.vue file in the ## directory, and write the following code:

   <template>
     <div>
    <h1>实时聊天</h1>
    <div v-for="(message, index) in messages" :key="index">
      {{ message }}
    </div>
    <div>
      <input v-model="inputMessage" type="text" />
      <button @click="sendMessage">发送</button>
    </div>
     </div>
   </template>
   
   <script>
   export default {
     data() {
    return {
      messages: [],
      inputMessage: "",
    };
     },
     methods: {
    sendMessage() {
      // 调用后端API发送消息
    },
     },
   };
   </script>

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In the backend part, we Elixir's Phoenix framework will be used to handle real-time communications and backend logic.

1. Install Elixir and Phoenix:

   Open the terminal and execute the following command to install Elixir and Phoenix:
   

   $ brew install elixir
   $ mix archive.install hex phx_new

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2. Create Phoenix application:

   Enter the following command in the terminal to create a new Phoenix application:
   

   $ mix phx.new realtime_chat

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3. Write the Elixir module (Chat.ex):

   Open
   lib/realtime_chat_web/channels chat.ex file in the directory and write the following code:

   defmodule RealtimeChatWeb.ChatChannel do
     use Phoenix.Channel
   
     def join("chat:lobby", _params, socket) do
    {:ok, socket}
     end
     
     def handle_in("new_message", %{"message" => message}, socket) do
    broadcast(socket, "new_message", %{message: message})
    {:noreply, socket}
     end
   end

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4. Update routing (router.ex):

   Open
   lib/realtime_chat_web router.ex file in the /router directory, and then add the following code:

   defmodule RealtimeChatWeb.Router do
     use RealtimeChatWeb, :router
   
     # ...
   
     channel "chat:*", RealtimeChatWeb.ChatChannel
   end

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Now we have Completed the basic code of the front and back ends. Next, we need to implement front-end and back-end communication to implement the real-time chat function.

1. Connect to the backend server (main.js):

   Open the
   src/main.js file and add the following code:

   import Vue from "vue";
   import App from "./App.vue";
   import Phoenix from "phoenix";
   
   Vue.config.productionTip = false;
   
   const socket = new Phoenix.Socket("/socket", {});
   socket.connect();
   
   Vue.prototype.$socket = socket;
   
   new Vue({
     render: (h) => h(App),
   }).$mount("#app");

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2. Send and receive messages (Chat.vue):

   Modify the
   sendMessage method and data attribute of the Chat.vue file, To implement the functionality of sending and receiving real-time messages:

   methods: {
     sendMessage() {
    this.$socket.channel("chat:lobby").push("new_message", { message: this.inputMessage });
    this.inputMessage = "";
     },
   },
   created() {
     const channel = this.$socket.channel("chat:lobby");
   
     channel.on("new_message", (payload) => {
    this.messages.push(payload.message);
     });
   
     channel.join().receive("ok", (response) => {
    console.log("成功加入聊天室");
     });
   },

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Now we can run our real-time chat and messaging application.

1. Start the Elixir service:

   Enter the following command in the terminal to start the Elixir service:
   

   $ cd realtime_chat
   $ mix phx.server

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2. Start the Vue.js application:

   In another terminal window, navigate to the root directory of the Vue.js application and execute the following command:
   

   $ cd realtime-chat
   $ npm run serve

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Open the application:
3. In your browser, visit
   http://localhost :8080, you should be able to see the live chat interface.

This article introduces how to use Vue.js and Elixir's Phoenix framework to develop real-time chat and communication applications. The front-end Vue.js framework realizes user interaction and data display, and the back-end Elixir language and Phoenix framework realize real-time communication and back-end logic. I hope this article was helpful and inspired you with ideas for developing more real-time messaging apps.

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