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@ -65,6 +65,7 @@ export function baseCompile(
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const onError = options.onError || defaultOnError
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const isModuleMode = options.mode === 'module'
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/* istanbul ignore if */
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// 只要不是 dev onError 就是空函数
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if (__BROWSER__) {
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if (options.prefixIdentifiers === true) {
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onError(createCompilerError(ErrorCodes.X_PREFIX_ID_NOT_SUPPORTED))
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@ -81,7 +82,7 @@ export function baseCompile(
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if (options.scopeId && !isModuleMode) {
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onError(createCompilerError(ErrorCodes.X_SCOPE_ID_NOT_SUPPORTED))
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}
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// 给options 赋初始值 如果不是字符串 直接返回 template
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const ast = isString(template) ? baseParse(template, options) : template
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const [nodeTransforms, directiveTransforms] =
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getBaseTransformPreset(prefixIdentifiers)
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@ -67,17 +67,17 @@ const decodeMap: Record<string, string> = {
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}
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export const defaultParserOptions: MergedParserOptions = {
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delimiters: [`{{`, `}}`],
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getNamespace: () => Namespaces.HTML,
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getTextMode: () => TextModes.DATA,
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isVoidTag: NO,
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isPreTag: NO,
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isCustomElement: NO,
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delimiters: [`{{`, `}}`], // 模板分割付
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getNamespace: () => Namespaces.HTML, // HTML
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getTextMode: () => TextModes.DATA, //DATA
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isVoidTag: NO, // 无效标签
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isPreTag: NO, // 是不是pre标签
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isCustomElement: NO, // 是不是自定义标签
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decodeEntities: (rawText: string): string =>
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rawText.replace(decodeRE, (_, p1) => decodeMap[p1]),
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rawText.replace(decodeRE, (_, p1) => decodeMap[p1]), // 讲实体字符转换成字符串
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onError: defaultOnError,
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onWarn: defaultOnWarn,
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comments: __DEV__
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comments: __DEV__ // ???
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}
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export const enum TextModes {
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@ -105,8 +105,11 @@ export function baseParse(
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content: string,
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options: ParserOptions = {}
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): RootNode {
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// 给options 覆初始值 没有的属性都赋值进去
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const context = createParserContext(content, options)
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// 貌似获取的是固定的
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const start = getCursor(context)
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// create root
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return createRoot(
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parseChildren(context, TextModes.DATA, []),
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getSelection(context, start)
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@ -117,15 +120,12 @@ function createParserContext(
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content: string,
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rawOptions: ParserOptions
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): ParserContext {
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const options = extend({}, defaultParserOptions)
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const options = extend({}, defaultParserOptions) // 这一行将所有defaultParserOptions属性复制给options
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// 如果对象属性没有 讲使用默认的 defaultParserOptions
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let key: keyof ParserOptions
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for (key in rawOptions) {
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// @ts-ignore
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options[key] =
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rawOptions[key] === undefined
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? defaultParserOptions[key]
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: rawOptions[key]
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options[key] = rawOptions[key] === undefined ? defaultParserOptions[key] : rawOptions[key] // 当rawOptions key值是undefined的时候 给defaultParserOptionsde的值 不是unidentified 给 rawOptions的值
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}
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return {
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options,
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@ -139,24 +139,27 @@ function createParserContext(
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onWarn: options.onWarn
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}
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}
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// 解析标签
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// ancestors 默认是空数组
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function parseChildren(
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context: ParserContext,
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mode: TextModes,
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ancestors: ElementNode[]
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): TemplateChildNode[] {
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// ancestors 获取最后一个元素 默认undefined
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// mode DATA
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const parent = last(ancestors)
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const ns = parent ? parent.ns : Namespaces.HTML
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const nodes: TemplateChildNode[] = []
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const ns = parent ? parent.ns : Namespaces.HTML // 如果有 就取ns 没有 HTML ?
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const nodes: TemplateChildNode[] = [] // ??创建列表
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// 判断是不是结束标签
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while (!isEnd(context, mode, ancestors)) {
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__TEST__ && assert(context.source.length > 0)
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const s = context.source
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const s = context.source // html 代码
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let node: TemplateChildNode | TemplateChildNode[] | undefined = undefined
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if (mode === TextModes.DATA || mode === TextModes.RCDATA) {
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if (!context.inVPre && startsWith(s, context.options.delimiters[0])) {
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// '{{'
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// 判断是不是'{{' 开头
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node = parseInterpolation(context, mode)
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} else if (mode === TextModes.DATA && s[0] === '<') {
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// https://html.spec.whatwg.org/multipage/parsing.html#tag-open-state
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@ -964,11 +967,12 @@ function parseInterpolation(
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context: ParserContext,
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mode: TextModes
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): InterpolationNode | undefined {
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const [open, close] = context.options.delimiters
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__TEST__ && assert(startsWith(context.source, open))
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const [open, close] = context.options.delimiters // open {{ close }}
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__TEST__ && assert(startsWith(context.source, open)) // 是否为test
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const closeIndex = context.source.indexOf(close, open.length)
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const closeIndex = context.source.indexOf(close, open.length)// 获取结束位置
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if (closeIndex === -1) {
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// 找不到结束
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emitError(context, ErrorCodes.X_MISSING_INTERPOLATION_END)
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return undefined
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}
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@ -1057,6 +1061,7 @@ function parseTextData(
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}
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function getCursor(context: ParserContext): Position {
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console.log(context)
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const { column, line, offset } = context
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return { column, line, offset }
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}
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@ -1067,6 +1072,7 @@ function getSelection(
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end?: Position
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): SourceLocation {
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end = end || getCursor(context)
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console.log(start,end)
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return {
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start,
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end,
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@ -1132,7 +1138,7 @@ function isEnd(
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mode: TextModes,
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ancestors: ElementNode[]
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): boolean {
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const s = context.source
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const s = context.source // 原始html
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switch (mode) {
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case TextModes.DATA:
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@ -37,10 +37,14 @@ export const DOMDirectiveTransforms: Record<string, DirectiveTransform> = {
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show: transformShow
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}
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// 生成语法树
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export function compile(
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template: string,
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options: CompilerOptions = {}
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): CodegenResult {
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// template 模板
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// options 不知道干啥的参数
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// console.log(options)
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return baseCompile(
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template,
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extend({}, parserOptions, options, {
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@ -756,6 +756,7 @@ let installWithProxy: (i: ComponentInternalInstance) => void
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* For runtime-dom to register the compiler.
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* Note the exported method uses any to avoid d.ts relying on the compiler types.
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*/
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// ???
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export function registerRuntimeCompiler(_compile: any) {
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compile = _compile
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installWithProxy = i => {
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@ -14,6 +14,7 @@ export const vShow: ObjectDirective<VShowElement> = {
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setDisplay(el, value)
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}
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},
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// 监听器 属性复制
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mounted(el, { value }, { transition }) {
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if (transition && value) {
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transition.enter(el)
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@ -21,24 +21,31 @@ import * as runtimeDom from '@vue/runtime-dom'
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function wrappedCreateApp(...args: any[]) {
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// @ts-ignore
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// 兼容new Vue
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const app = createApp(...args)
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// todo: 是不是看内部组件是否兼容??
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if (compatUtils.isCompatEnabled(DeprecationTypes.RENDER_FUNCTION, null)) {
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// register built-in components so that they can be resolved via strings
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// in the legacy h() call. The __compat__ prefix is to ensure that v3 h()
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// doesn't get affected.
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// 。注册内部组件
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app.component('__compat__transition', Transition)
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app.component('__compat__transition-group', TransitionGroup)
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app.component('__compat__keep-alive', KeepAlive)
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// built-in directives. No need for prefix since there's no render fn API
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// for resolving directives via string in v3.
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// v-show 实现
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app._context.directives.show = vShow
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// v-model 实现
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app._context.directives.model = vModelDynamic
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}
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return app
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}
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export function createCompatVue() {
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// 旧得全局构造函数????
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const Vue = compatUtils.createCompatVue(createApp, wrappedCreateApp)
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// 把所有runtimeDom里面的属性方法放到Vue里面
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extend(Vue, runtimeDom)
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return Vue
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}
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@ -17,23 +17,31 @@ function compileToFunction(
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template: string | HTMLElement,
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options?: CompilerOptions
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): RenderFunction {
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// 不是string
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if (!isString(template)) {
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// 判断节点类型 没有就不是节点
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if (template.nodeType) {
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// 取内部的html代码
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template = template.innerHTML
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} else {
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// 报错 返回一个空函数
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__DEV__ && warn(`invalid template option: `, template)
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return NOOP
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}
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}
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const key = template
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// 获取值
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const cached = compileCache[key]
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// 如果有值 直接返回缓存之前的
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if (cached) {
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return cached
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}
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// 判断第一个字符串是不是#
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if (template[0] === '#') {
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// 那么通过id 去选择元素
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const el = document.querySelector(template)
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// 如果获取不到
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if (__DEV__ && !el) {
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warn(`Template element not found or is empty: ${template}`)
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}
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@ -41,13 +49,14 @@ function compileToFunction(
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// Reason: potential execution of JS expressions in in-DOM template.
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// The user must make sure the in-DOM template is trusted. If it's rendered
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// by the server, the template should not contain any user data.
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// 获取的到 取内部的html
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template = el ? el.innerHTML : ``
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}
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// 如果是 dev 不是test 不包含 options.whitespace 发出警告 压缩空白
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if (__DEV__ && !__TEST__ && (!options || !options.whitespace)) {
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warnDeprecation(DeprecationTypes.CONFIG_WHITESPACE, null)
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}
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// template html 模板
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const { code } = compile(
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template,
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extend(
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@ -89,9 +98,11 @@ function compileToFunction(
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return (compileCache[key] = render)
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}
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// 为runtime-dom 注册编译器
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registerRuntimeCompiler(compileToFunction)
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// 创建vue 初始化属性 自带组件
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const Vue = createCompatVue()
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// 编译?函数
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Vue.compile = compileToFunction
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export default Vue
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@ -6,7 +6,7 @@ import { registerRuntimeCompiler, RenderFunction, warn } from '@vue/runtime-dom'
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import * as runtimeDom from '@vue/runtime-dom'
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import { isString, NOOP, generateCodeFrame, extend } from '@vue/shared'
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import { InternalRenderFunction } from 'packages/runtime-core/src/component'
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// 判断是不是调试模式
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if (__DEV__) {
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initDev()
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}
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@ -17,21 +17,27 @@ function compileToFunction(
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template: string | HTMLElement,
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options?: CompilerOptions
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): RenderFunction {
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// 判断是不是字符串
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if (!isString(template)) {
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// 不是字符串判断下有没有nodeType属性
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if (template.nodeType) {
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// 获取内部的html代码
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template = template.innerHTML
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} else {
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// 报错 返回空函数
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__DEV__ && warn(`invalid template option: `, template)
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return NOOP
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}
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}
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// key 等于传入末班
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const key = template
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// 获取缓存 ??
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const cached = compileCache[key]
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// 有直接返回缓存
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if (cached) {
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return cached
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}
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// 判断是不是id
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if (template[0] === '#') {
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const el = document.querySelector(template)
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if (__DEV__ && !el) {
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@ -43,7 +49,10 @@ function compileToFunction(
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// by the server, the template should not contain any user data.
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template = el ? el.innerHTML : ``
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}
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// 合并传入的选项
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// 添加 hoistStatic
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// onError
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// onWarn
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const opts = extend(
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{
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hoistStatic: true,
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@ -52,7 +61,9 @@ function compileToFunction(
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} as CompilerOptions,
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options
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)
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// ?? 不知道这个是干啥的
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// 根不执行
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console.log(opts.isCustomElement,customElements)
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if (!opts.isCustomElement && typeof customElements !== 'undefined') {
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opts.isCustomElement = tag => !!customElements.get(tag)
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}
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