生命周期函数
b'b
vue3使用use
main.js
import { createApp } from "vue";
const app = createApp();
app.use(...)
全局挂载
app.config.globalProperties.$system = '系统'
b'b
main.js
import { createApp } from "vue";
const app = createApp();
app.use(...)
app.config.globalProperties.$system = '系统'