feat(core): mark installed plugins

docs-vitepress/api/global-api.md

@@ -100,6 +100,8 @@ mpx.use(test)
 mpx.use(test, {prefix: 'mpx'}, 'otherparams')
 ```
 
+插件成功安装后，Mpx 会将插件对象或函数的 `__installed` 属性设置为 `true`，外部代码可以通过该标记判断插件是否已经安装。Mpx 内部仍使用独立的插件列表避免重复安装。
+
 ### watch
 
 watch 可以通过全局实例访问，也可以使用具名导出的方式，二者逻辑相同，我们推荐使用具名导出的方式。[查看详情](reactivity-api/computed-watch-api.html#watch)

packages/core/@types/index.d.ts

@@ -567,10 +567,15 @@ interface ImplementOptions {
 
 export function toPureObject<T extends object> (obj: T): T
 
-declare type PluginInstallFunction = (app: Mpx, ...options: any[]) => any
+declare type PluginInstallHandler = (app: Mpx, ...options: any[]) => any
+
+declare type PluginInstallFunction = PluginInstallHandler & {
+  __installed?: boolean
+}
 
 export type Plugin = PluginInstallFunction | {
-  install: PluginInstallFunction
+  install: PluginInstallHandler
+  __installed?: boolean
 }
 
 export type PluginFunction<T extends Plugin> = T extends PluginInstallFunction ? T : T extends { install: infer U } ? U : never

packages/core/__tests__/common/use.spec.js

@@ -0,0 +1,29 @@
+global.__mpx_mode__ = 'wx'
+global.mpxGlobal = {}
+global.wx = {}
+
+jest.mock('@mpxjs/perf', () => ({}), { virtual: true })
+
+const Mpx = require('../../src').default
+
+describe('Mpx.use', () => {
+  it('should mark an object plugin as installed', () => {
+    const plugin = {
+      install: jest.fn()
+    }
+
+    Mpx.use(plugin)
+
+    expect(plugin.install).toHaveBeenCalledTimes(1)
+    expect(plugin.__installed).toBe(true)
+  })
+
+  it('should mark a function plugin as installed', () => {
+    const plugin = jest.fn()
+
+    Mpx.use(plugin)
+
+    expect(plugin).toHaveBeenCalledTimes(1)
+    expect(plugin.__installed).toBe(true)
+  })
+})

packages/core/src/index.js

@@ -110,6 +110,7 @@ function use (plugin, options = {}) {
   extendProps(Mpx, proxyMpx, rawProps, options)
   extendProps(Mpx.prototype, proxyMpx.prototype, rawPrototypeProps, options)
   installedPlugins.push(plugin)
+  plugin.__installed = true
   return this
 }