入口寻找
- 入口
platforms/web/entry-runtime-with-compiler中import了./runtime/index导出的vue。 -
./runtime/index中引入了core/index中的vue. -
core/index中引入了instance/index中的vue -
instance/index中，定义了vue的构造函数
instance/index中的vue
function Vue (options) { if (process.env.NODE_ENV !== 'production' && !(this instanceof Vue) ) { warn('Vue is a constructor and should be called with the `new` keyword') } this._init(options)}// 原型上挂载了init方法，用来做初始化initMixin(Vue)// 原型上挂载$data的属性描述符getter，返回this._data// 原型上挂载$props的属性描述符getter, 返回this._props// 原型上挂载$set与$delete方法，用来为对象新增/删除响应式属性// 原型上挂载$watch方法stateMixin(Vue)// 原型上挂载事件相关的方法, $on、$once、$off、$emit。eventsMixin(Vue)// 原型上挂载_update、$destroy与$forceUpdate方法，与组件更新有关。lifecycleMixin(Vue)// 原型挂载组件渲染相关方法，_render方法（用来返回vnode,即虚拟dom）renderMixin(Vue)export default Vue core/index中的vue
index
import Vue from './instance/index'import { initGlobalAPI } from './global-api/index'import { isServerRendering } from 'core/util/env'// 初始化一些全局APIinitGlobalAPI(Vue)// 是否是服务端渲染Object.defineProperty(Vue.prototype, '$isServer', { get: isServerRendering // global['process'].env.VUE_ENV === 'server'})// ssr相关Object.defineProperty(Vue.prototype, '$ssrContext', { get () { /* istanbul ignore next */ return this.$vnode && this.$vnode.ssrContext }})Vue.version = '__VERSION__'export default Vue
initGlobalAPI
// 定义vue配置对象，配置对象详情见 import config from '../config'中的备注 const configDef = {} configDef.get = () => config Object.defineProperty(Vue, 'config', configDef) // 定义一些内部公用方法 Vue.util = { warn, // ⚠️警告打印相关 extend, // 浅拷贝函数 mergeOptions, // 配置合并，用到的时候细看 defineReactive // 定义响应式属性的方法。 } // 静态方法，同$set、$delete、$nextTick Vue.set = set Vue.delete = del Vue.nextTick = nextTick Vue.options = Object.create(null) ASSET_TYPES.forEach(type => { Vue.options[type + 's'] = Object.create(null) }) // Vue.options => {"components":{},"directives":{},"filters":{}} // 跟Weex's multi-instance scenarios多场景有关 Vue.options._base = Vue; //将内置组件塞进来 extend(Vue.options.components, builtInComponents) // 定义Vue.use，主要在应用在插件系统中 initUse(Vue) // 定义Vue.mixin, 就一句this.options = mergeOptions(this.options, mixin) initMixin(Vue) // 定义Vue.extend, 用作原型继承，通过它，可以创建子组件的构造函数 initExtend(Vue) // 扩展Vue.component,Vue.directive,Vue.filter方法 initAssetRegisters(Vue) runtime/index中的vue
import Vue from 'core/index'import config from 'core/config'import { extend, noop } from 'shared/util'import { mountComponent } from 'core/instance/lifecycle'import { devtools, inBrowser, isChrome } from 'core/util/index'import { query, mustUseProp, isReservedTag, isReservedAttr, getTagNamespace, isUnknownElement} from 'web/util/index'import { patch } from './patch'import platformDirectives from './directives/index'import platformComponents from './components/index'// 一些标签检查类的方法。平台相关Vue.config.mustUseProp = mustUsePropVue.config.isReservedTag = isReservedTagVue.config.isReservedAttr = isReservedAttrVue.config.getTagNamespace = getTagNamespaceVue.config.isUnknownElement = isUnknownElement// 平台相关指令组件// 指令有model与show// 组件有Transition与TransitionGroupextend(Vue.options.directives, platformDirectives)extend(Vue.options.components, platformComponents)// install platform patch functionVue.prototype.__patch__ = inBrowser ? patch : noop// public mount methodVue.prototype.$mount = function ( el?: string | Element, hydrating?: boolean): Component { el = el && inBrowser ? query(el) : undefined return mountComponent(this, el, hydrating)} entry-runtime-with-compiler中的vue
import config from 'core/config'import { warn, cached } from 'core/util/index'import { mark, measure } from 'core/util/perf'import Vue from './runtime/index'import { query } from './util/index'import { shouldDecodeNewlines } from './util/compat'import { compileToFunctions } from './compiler/index'// 根据id返回dom内容const idToTemplate = cached(id => { const el = query(id) return el && el.innerHTML})// 重写$mount方法const mount = Vue.prototype.$mountVue.prototype.$mount = function ( el?: string | Element, hydrating?: boolean): Component { el = el && query(el) /* 将vue绑定到body或者html元素上的错误提示 */ if (el === document.body || el === document.documentElement) { process.env.NODE_ENV !== 'production' && warn( `Do not mount Vue to or - mount to normal elements instead.` ) return this } const options = this.$options // 解析template或者el属性，将其转化为render函数 if (!options.render) { let template = options.template // 获得模板字符串 if (template) { if (typeof template === 'string') { if (template.charAt(0) === '#') { template = idToTemplate(template) } } else if (template.nodeType) { template = template.innerHTML } else { if (process.env.NODE_ENV !== 'production') { warn('invalid template option:' + template, this) } return this } } else if (el) { template = getOuterHTML(el) } // 获得模板字符串后，编译模板为render函数 if (template) { /* istanbul ignore if */ if (process.env.NODE_ENV !== 'production' && config.performance && mark) { mark('compile') } const { render, staticRenderFns } = compileToFunctions(template, { shouldDecodeNewlines, delimiters: options.delimiters, comments: options.comments }, this) options.render = render options.staticRenderFns = staticRenderFns /* istanbul ignore if */ if (process.env.NODE_ENV !== 'production' && config.performance && mark) { mark('compile end') measure(`vue ${this._name} compile`, 'compile', 'compile end') } } } return mount.call(this, el, hydrating)}/** * Get outerHTML of elements, taking care * of SVG elements in IE as well. */function getOuterHTML (el: Element): string { if (el.outerHTML) { return el.outerHTML } else { const container = document.createElement('div') container.appendChild(el.cloneNode(true)) return container.innerHTML }}Vue.compile = compileToFunctionsexport default Vue 文章链接