在 Vue 3 中使用 Socket(如 WebSocket 或基于 WebSocket 的库比如 Socket.IO)可以通过组合式 API(Composition API)来实现得更清晰、模块化。下面我给你展示一个完整的例子,包括使用原生 WebSocket 和使用 Socket.IO 的方式(你可以根据实际情况选择)。
// composables/useWebSocket.ts
import { ref, onUnmounted } from 'vue'
export function useWebSocket(url: string) {
const socket = ref<WebSocket | null>(null)
const messages = ref<string[]>([])
const connect = () => {
socket.value = new WebSocket(url)
socket.value.onopen = () => {
console.log('WebSocket connected')
}
socket.value.onmessage = (event) => {
messages.value.push(event.data)
}
socket.value.onclose = () => {
console.log('WebSocket closed')
}
socket.value.onerror = (error) => {
console.error('WebSocket error', error)
}
}
const sendMessage = (message: string) => {
if (socket.value?.readyState === WebSocket.OPEN) {
socket.value.send(message)
}
}
onUnmounted(() => {
socket.value?.close()
})
return {
messages,
connect,
sendMessage,
}
}
- {{ msg }}
npm install socket.io-client
// composables/useSocketIO.ts
import { io, Socket } from 'socket.io-client'
import { ref, onUnmounted } from 'vue'
export function useSocketIO(url: string) {
const socket: Socket = io(url)
const messages = ref<string[]>([])
socket.on('connect', () => {
console.log('Socket.IO connected')
})
socket.on('message', (msg: string) => {
messages.value.push(msg)
})
const sendMessage = (msg: string) => {
socket.emit('message', msg)
}
onUnmounted(() => {
socket.disconnect()
})
return {
messages,
sendMessage,
}
}