feat: getCurrentInstance bundle

Author: lishiwen

lib/m-vue.cjs.js

@@ -235,6 +235,7 @@ var instanceRuntimeExtendApis = /*#__PURE__*/Object.freeze({
     promiseEmit: promiseEmit
 });
 
+let currentInstance = null;
 function createComponentInstance(vnode) {
     // instance
     const component = {
@@ -262,10 +263,14 @@ function setupStatefulComponent(instance) {
     const context = { _instance: instance, _component: Component };
     instance.proxy = new Proxy(context, ComponentPublicInstanceHandlers);
     if (Component.setup) {
+        // NOTE: getCurrentInstance() API 只能在 setup() 中调用
+        // 并且针对于每个组件都会拥有自己的组件实例
+        setCurrentInstance(instance);
         // props is readonly because it's a Reflect instance
         const readonlyProps = shallowReadonly(instance.props);
         // TODO: context
         const setupResult = Component.setup(readonlyProps, Object.assign({ emit: instance.emit }, instanceRuntimeExtendApis));
+        clearCurrentInstance();
         handleSetupResult(instance, setupResult);
     }
 }
@@ -281,6 +286,15 @@ function finishComponentSetup(instance) {
     instance.render = Component.render;
     // }
 }
+function getCurrentInstance() {
+    return currentInstance;
+}
+function setCurrentInstance(instance) {
+    currentInstance = instance;
+}
+function clearCurrentInstance() {
+    currentInstance = null;
+}
 
 function render(vnode, container) {
     patch(vnode, container);
@@ -397,12 +411,15 @@ function renderSlots(slots, renderName, props = {}) {
     }
 }
 
+exports.clearCurrentInstance = clearCurrentInstance;
 exports.createApp = createApp;
 exports.createComponentInstance = createComponentInstance;
 exports.createTextVNode = createTextVNode;
 exports.createVNode = createVNode;
+exports.getCurrentInstance = getCurrentInstance;
 exports.h = h;
 exports.patch = patch;
 exports.render = render;
 exports.renderSlots = renderSlots;
+exports.setCurrentInstance = setCurrentInstance;
 exports.setupComponent = setupComponent;

lib/m-vue.esm.js

@@ -231,6 +231,7 @@ var instanceRuntimeExtendApis = /*#__PURE__*/Object.freeze({
     promiseEmit: promiseEmit
 });
 
+let currentInstance = null;
 function createComponentInstance(vnode) {
     // instance
     const component = {
@@ -258,10 +259,14 @@ function setupStatefulComponent(instance) {
     const context = { _instance: instance, _component: Component };
     instance.proxy = new Proxy(context, ComponentPublicInstanceHandlers);
     if (Component.setup) {
+        // NOTE: getCurrentInstance() API 只能在 setup() 中调用
+        // 并且针对于每个组件都会拥有自己的组件实例
+        setCurrentInstance(instance);
         // props is readonly because it's a Reflect instance
         const readonlyProps = shallowReadonly(instance.props);
         // TODO: context
         const setupResult = Component.setup(readonlyProps, Object.assign({ emit: instance.emit }, instanceRuntimeExtendApis));
+        clearCurrentInstance();
         handleSetupResult(instance, setupResult);
     }
 }
@@ -277,6 +282,15 @@ function finishComponentSetup(instance) {
     instance.render = Component.render;
     // }
 }
+function getCurrentInstance() {
+    return currentInstance;
+}
+function setCurrentInstance(instance) {
+    currentInstance = instance;
+}
+function clearCurrentInstance() {
+    currentInstance = null;
+}
 
 function render(vnode, container) {
     patch(vnode, container);
@@ -393,4 +407,4 @@ function renderSlots(slots, renderName, props = {}) {
     }
 }
 
-export { createApp, createComponentInstance, createTextVNode, createVNode, h, patch, render, renderSlots, setupComponent };
+export { clearCurrentInstance, createApp, createComponentInstance, createTextVNode, createVNode, getCurrentInstance, h, patch, render, renderSlots, setCurrentInstance, setupComponent };