Web Components \u662f\u4e00\u9879\u539f\u751f\u6d4f\u89c8\u5668\u6280\u672f\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u521b\u5efa\u53ef\u590d\u7528\u7684\u81ea\u5b9a\u4e49\u5143\u7d20\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c\u6211\u4eec\u5f80\u5f80\u9700\u8981\u5728 React\u3001Vue \u6216 Angular \u7b49\u6846\u67b6\u4e2d\u4f7f\u7528\u8fd9\u4e9b\u7ec4\u4ef6\u3002\u7531\u4e8e\u6846\u67b6\u7684\u865a\u62df DOM \u548c\u751f\u547d\u5468\u671f\u4e0e\u539f\u751f Web Components \u5b58\u5728\u5dee\u5f02\uff0c\u76f4\u63a5\u4f7f\u7528\u53ef\u80fd\u4f1a\u9047\u5230\u6570\u636e\u7ed1\u5b9a\u5931\u6548\u3001\u4e8b\u4ef6\u4e22\u5931\u7b49\u95ee\u9898\u3002\u672c\u6587\u5c06\u5e26\u4f60\u9010\u4e00\u653b\u514b\u8fd9\u4e9b\u6311\u6218\uff0c\u5b9e\u73b0\u6846\u67b6\u4e0e Web Components \u7684\u65e0\u7f1d\u96c6\u6210\u3002<\/p>\n
Web Components \u7531\u4e09\u9879\u6838\u5fc3\u6280\u672f\u7ec4\u6210\uff1a<\/p>\n
\u4e00\u4e2a\u7b80\u5355\u7684 Web Component \u793a\u4f8b\uff1a<\/p>\n
\nclass MyCounter extends HTMLElement {\n constructor() {\n super();\n this.attachShadow({ mode: 'open' });\n this.count = 0;\n }\n\n connectedCallback() {\n this.render();\n this.shadowRoot.querySelector('button').addEventListener('click', () => {\n this.count++;\n this.updateDisplay();\n });\n }\n\n render() {\n this.shadowRoot.innerHTML = `\n <style>\n button { padding: 8px 16px; }\n span { margin-left: 8px; font-weight: bold; }\n <\/style>\n <button>\u589e\u52a0<\/button>\n <span>0<\/span>\n `;\n }\n\n updateDisplay() {\n this.shadowRoot.querySelector('span').textContent = this.count;\n }\n}\n\ncustomElements.define('my-counter', MyCounter);\n<\/code><\/pre>\n2. \u5728 React \u4e2d\u4f7f\u7528 Web Components<\/h2>\n
React \u5c06 Web Components \u89c6\u4e3a\u666e\u901a HTML \u5143\u7d20\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u5c5e\u6027\u4f20\u9012\u548c\u4e8b\u4ef6\u5904\u7406\u3002<\/p>\n
2.1 \u5c5e\u6027\u4f20\u9012<\/h3>\n
React \u901a\u8fc7 props<\/code> \u4f20\u9012\u6570\u636e\uff0c\u4f46 Web Components \u7684\u5c5e\u6027\u9700\u8981\u8f6c\u6362\u4e3a\u539f\u751f\u5c5e\u6027\u6216\u4f7f\u7528 setAttribute<\/code>\u3002<\/p>\n\nimport React from 'react';\n\nfunction App() {\n return (\n <div>\n {\/* \u76f4\u63a5\u4f20\u9012\u5b57\u7b26\u4e32\u5c5e\u6027 *\/}\n <my-counter label="\u8ba1\u6570\u5668"><\/my-counter>\n \n {\/* \u4f20\u9012\u590d\u6742\u6570\u636e\uff1a\u4f7f\u7528 ref \u548c useEffect *\/}\n <my-user\n ref={userRef}\n id="123"\n name="\u5f20\u4e09"\n ><\/my-user>\n <\/div>\n );\n}\n<\/code><\/pre>\n\u5bf9\u4e8e\u975e\u5b57\u7b26\u4e32\u5c5e\u6027\uff08\u5982\u5bf9\u8c61\u3001\u6570\u7ec4\uff09\uff0c\u9700\u8981\u4f7f\u7528 ref<\/code> \u76f4\u63a5\u64cd\u4f5c DOM\uff1a<\/p>\n\nimport React, { useEffect, useRef } from 'react';\n\nfunction UserComponent({ user }) {\n const userRef = useRef(null);\n\n useEffect(() => {\n if (userRef.current) {\n userRef.current.user = user; \/\/ \u76f4\u63a5\u8bbe\u7f6e\u5c5e\u6027\n }\n }, [user]);\n\n return <my-user ref={userRef}><\/my-user>;\n}\n<\/code><\/pre>\n2.2 \u4e8b\u4ef6\u5904\u7406<\/h3>\n
Web Components \u89e6\u53d1\u81ea\u5b9a\u4e49\u4e8b\u4ef6\uff0cReact \u65e0\u6cd5\u76f4\u63a5\u901a\u8fc7 onEventName<\/code> \u76d1\u542c\u3002\u9700\u8981\u4f7f\u7528 addEventListener<\/code>\uff1a<\/p>\n\nimport React, { useEffect, useRef } from 'react';\n\nfunction CounterWrapper() {\n const counterRef = useRef(null);\n\n useEffect(() => {\n const handleChange = (e) => {\n console.log('Count changed:', e.detail);\n };\n const el = counterRef.current;\n el.addEventListener('count-changed', handleChange);\n return () => el.removeEventListener('count-changed', handleChange);\n }, []);\n\n return <my-counter ref={counterRef}><\/my-counter>;\n}\n<\/code><\/pre>\n2.3 \u8e29\u5751\u7ecf\u9a8c<\/h3>\n\n- React 18 \u4e4b\u524d\uff0c
ref<\/code> \u56de\u8c03\u53ef\u80fd\u591a\u6b21\u6267\u884c\uff0c\u5efa\u8bae\u4f7f\u7528 useRef<\/code> \u6216 useCallback<\/code>\u3002<\/li>\n- \u907f\u514d\u5728 Web Component \u5185\u90e8\u4f7f\u7528 React \u7684\u5408\u6210\u4e8b\u4ef6\uff0c\u4ee5\u514d\u6df7\u6dc6\u3002<\/li>\n<\/ul>\n
3. \u5728 Vue \u4e2d\u4f7f\u7528 Web Components<\/h2>\n
Vue \u5bf9 Web Components \u7684\u652f\u6301\u8f83\u597d\uff0c\u53ef\u4ee5\u76f4\u63a5\u5728\u6a21\u677f\u4e2d\u4f7f\u7528\uff0c\u4f46\u9700\u8981\u6ce8\u610f v-model<\/code> \u548c\u4e8b\u4ef6\u3002<\/p>\n3.1 \u57fa\u672c\u4f7f\u7528<\/h3>\n\n<template>\n <div>\n <my-counter :label="label" @count-changed="handleCountChanged"><\/my-counter>\n <\/div>\n<\/template>\n\n<script>\nexport default {\n data() {\n return { label: 'Vue \u8ba1\u6570\u5668' };\n },\n methods: {\n handleCountChanged(e) {\n console.log('Count:', e.detail);\n }\n }\n};\n<\/script>\n<\/code><\/pre>\n3.2 \u4f7f\u7528 v-model<\/code><\/h3>\nWeb Components \u9ed8\u8ba4\u4e0d\u652f\u6301 v-model<\/code>\uff0c\u9700\u8981\u624b\u52a8\u5904\u7406\u3002\u53ef\u4ee5\u5728 Web Component \u5185\u90e8\u5b9e\u73b0\u4e00\u4e2a value<\/code> \u5c5e\u6027\u548c input<\/code> \u4e8b\u4ef6\uff1a<\/p>\n\nclass MyInput extends HTMLElement {\n \/\/ ...\n connectedCallback() {\n this.shadowRoot.querySelector('input').addEventListener('input', (e) => {\n this.value = e.target.value;\n this.dispatchEvent(new CustomEvent('input', { detail: this.value }));\n });\n }\n}\n<\/code><\/pre>\n\u7136\u540e\u5728 Vue \u4e2d\u4f7f\u7528\uff1a<\/p>\n
\n<template>\n <my-input :value="text" @input="text = $event.detail"><\/my-input>\n<\/template>\n<\/code><\/pre>\n3.3 \u8e29\u5751\u7ecf\u9a8c<\/h3>\n\n- Vue 2 \u4e2d\uff0c
is<\/code> \u5c5e\u6027\u7528\u4e8e\u89e3\u6790\u81ea\u5b9a\u4e49\u5143\u7d20\uff0c\u4f46 Vue 3 \u5df2\u6539\u8fdb\u3002\u5efa\u8bae\u4f7f\u7528 vue.config.ignoredElements<\/code> \u6216 is<\/code> \u5c5e\u6027\u3002<\/li>\n- \u786e\u4fdd Web Component \u7684
attributeChangedCallback<\/code> \u6b63\u786e\u89e6\u53d1\uff0c\u5426\u5219 Vue \u7684\u54cd\u5e94\u5f0f\u66f4\u65b0\u53ef\u80fd\u65e0\u6548\u3002<\/li>\n<\/ul>\n4. \u5728 Angular \u4e2d\u4f7f\u7528 Web Components<\/h2>\n
Angular \u9ed8\u8ba4\u53ea\u8bc6\u522b Angular \u7ec4\u4ef6\uff0c\u9700\u8981\u5c06 Web Components \u6ce8\u518c\u5230 CUSTOMELEMENTS<\/em>SCHEMA<\/code>\u3002<\/p>\n4.1 \u6ce8\u518c\u6a21\u5f0f<\/h3>\n
\u5728 app.module.ts<\/code> \u4e2d\uff1a<\/p>\n\nimport { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular\/core';\n\n@NgModule({\n declarations: [AppComponent],\n imports: [BrowserModule],\n schemas: [CUSTOM_ELEMENTS_SCHEMA], \/\/ \u5141\u8bb8\u81ea\u5b9a\u4e49\u5143\u7d20\n bootstrap: [AppComponent]\n})\nexport class AppModule { }\n<\/code><\/pre>\n4.2 \u5c5e\u6027\u7ed1\u5b9a<\/h3>\n
\u4f7f\u7528 [prop]<\/code> \u7ed1\u5b9a\u5c5e\u6027\uff1a<\/p>\n\n<my-counter [label]="label" (count-changed)="handleChange($event)"><\/my-counter>\n<\/code><\/pre>\n4.3 \u4e8b\u4ef6\u7ed1\u5b9a<\/h3>\n
Angular \u7684\u4e8b\u4ef6\u7ed1\u5b9a (event)<\/code> \u53ef\u4ee5\u76d1\u542c\u81ea\u5b9a\u4e49\u4e8b\u4ef6\uff0c\u4f46\u9700\u8981\u786e\u4fdd\u4e8b\u4ef6\u540d\u79f0\u5168\u5c0f\u5199\u6216\u4f7f\u7528 @Output<\/code> \u88c5\u9970\u5668\u3002\u63a8\u8350\u4f7f\u7528\u5c0f\u5199\u4e8b\u4ef6\u540d\uff1a<\/p>\n\n\/\/ Web Component \u4e2d\nthis.dispatchEvent(new CustomEvent('countchanged', { detail: this.count }));\n\n\/\/ Angular \u6a21\u677f\u4e2d\n<my-counter (countchanged)="handleChange($event)"><\/my-counter>\n<\/code><\/pre>\n4.4 \u8e29\u5751\u7ecf\u9a8c<\/h3>\n\n- Angular \u7684 Zone.js \u53ef\u80fd\u4e0d\u4f1a\u81ea\u52a8\u68c0\u6d4b Web Component \u5185\u90e8\u7684\u53d8\u5316\uff0c\u9700\u8981\u624b\u52a8\u8c03\u7528
ChangeDetectorRef.detectChanges()<\/code>\u3002<\/li>\n- \u5982\u679c Web Component \u4f7f\u7528 Shadow DOM\uff0cAngular \u7684\u6837\u5f0f\u5c01\u88c5\u53ef\u80fd\u88ab\u7834\u574f\uff0c\u5efa\u8bae\u4f7f\u7528
::ng-deep<\/code> \u6216\u5168\u5c40\u6837\u5f0f\u3002<\/li>\n<\/ul>\n5. \u901a\u7528\u6700\u4f73\u5b9e\u8df5<\/h2>\n5.1 \u6570\u636e\u4f20\u9012<\/h3>\n\n- \u57fa\u672c\u7c7b\u578b\u5c5e\u6027\uff1a\u76f4\u63a5\u4f7f\u7528\u5b57\u7b26\u4e32\u5c5e\u6027\u3002<\/li>\n
- \u590d\u6742\u6570\u636e\uff1a\u4f7f\u7528 DOM \u5c5e\u6027\uff08
element.property = value<\/code>\uff09\u3002<\/li>\n- \u53cc\u5411\u7ed1\u5b9a\uff1a\u5728 Web Component \u4e2d\u5b9e\u73b0
value<\/code> \u5c5e\u6027\u548c input<\/code> \u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n5.2 \u4e8b\u4ef6\u5904\u7406<\/h3>\n\n- \u7edf\u4e00\u4f7f\u7528
CustomEvent<\/code>\uff0c\u5e76\u5728\u547d\u540d\u65f6\u907f\u514d\u4e0e\u539f\u751f\u4e8b\u4ef6\u51b2\u7a81\u3002<\/li>\n- \u5728\u6846\u67b6\u4e2d\u901a\u8fc7
addEventListener<\/code> \u6216\u6846\u67b6\u539f\u751f\u4e8b\u4ef6\u7ed1\u5b9a\uff08\u5982 Vue \u7684 @event<\/code>\uff09\u76d1\u542c\u3002<\/li>\n<\/ul>\n5.3 \u751f\u547d\u5468\u671f\u7ba1\u7406<\/h3>\n\n- \u5728\u6846\u67b6\u7684\u5378\u8f7d\u9636\u6bb5\uff08\u5982 React \u7684
useEffect<\/code> \u6e05\u7406\u51fd\u6570\uff09\u79fb\u9664\u4e8b\u4ef6\u76d1\u542c\u3002<\/li>\n- \u907f\u514d\u5728 Web Component \u7684
disconnectedCallback<\/code> \u4e2d\u6267\u884c\u4e0e\u6846\u67b6\u76f8\u5173\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n5.4 \u6837\u5f0f\u9694\u79bb<\/h3>\n\n- \u4f7f\u7528 Shadow DOM \u786e\u4fdd\u6837\u5f0f\u9694\u79bb\u3002<\/li>\n
- \u6846\u67b6\u53ef\u4ee5\u901a\u8fc7 CSS \u81ea\u5b9a\u4e49\u5c5e\u6027\uff08
var(--color)<\/code>\uff09\u7a7f\u900f Shadow DOM\u3002<\/li>\n<\/ul>\n6. \u5b9e\u6218\uff1a\u6784\u5efa\u4e00\u4e2a\u8de8\u6846\u67b6\u7684\u65e5\u671f\u9009\u62e9\u5668<\/h2>\n
\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u65e5\u671f\u9009\u62e9\u5668 Web Component\uff0c\u5e76\u5728\u4e09\u4e2a\u6846\u67b6\u4e2d\u4f7f\u7528\u3002<\/p>\n
6.1 Web Component \u5b9e\u73b0<\/h3>\n\nclass DatePicker extends HTMLElement {\n constructor() {\n super();\n this.attachShadow({ mode: 'open' });\n this._value = '';\n }\n\n static get observedAttributes() {\n return ['value', 'placeholder'];\n }\n\n attributeChangedCallback(name, oldValue, newValue) {\n if (name === 'value') this._value = newValue;\n this.render();\n }\n\n get value() { return this._value; }\n set value(val) {\n this._value = val;\n this.setAttribute('value', val);\n this.dispatchEvent(new CustomEvent('change', { detail: val }));\n }\n\n connectedCallback() {\n this.render();\n this.shadowRoot.querySelector('input').addEventListener('input', (e) => {\n this.value = e.target.value;\n });\n }\n\n render() {\n this.shadowRoot.innerHTML = `\n <style>\n input { padding: 8px; border: 1px solid #ccc; border-radius: 4px; }\n <\/style>\n <input type="date" value="${this._value || ''}" placeholder="${this.getAttribute('placeholder') || '\u9009\u62e9\u65e5\u671f'}">\n `;\n }\n}\n\ncustomElements.define('date-picker', DatePicker);\n<\/code><\/pre>\n6.2 \u5728 React \u4e2d\u4f7f\u7528<\/h3>\n\nimport React, { useState, useRef, useEffect } from 'react';\n\nfunction DatePickerReact() {\n const [date, setDate] = useState('');\n const pickerRef = useRef(null);\n\n useEffect(() => {\n const handleChange = (e) => setDate(e.detail);\n pickerRef.current.addEventListener('change', handleChange);\n return () => pickerRef.current.removeEventListener('change', handleChange);\n }, []);\n\n return (\n <div>\n <date-picker ref={pickerRef} value={date}><\/date-picker>\n <p>\u9009\u4e2d\u7684\u65e5\u671f\uff1a{date}<\/p>\n <\/div>\n );\n}\n<\/code><\/pre>\n6.3 \u5728 Vue \u4e2d\u4f7f\u7528<\/h3>\n\n<template>\n <div>\n <date-picker :value="date" @change="date = $event.detail"><\/date-picker>\n <p>\u9009\u4e2d\u7684\u65e5\u671f\uff1a{{ date }}<\/p>\n <\/div>\n<\/template>\n\n<script>\nexport default {\n data() {\n return { date: '' };\n }\n};\n<\/script>\n<\/code><\/pre>\n6.4 \u5728 Angular \u4e2d\u4f7f\u7528<\/h3>\n\n\/\/ app.component.ts\nimport { Component } from '@angular\/core';\n\n@Component({\n selector: 'app-root',\n template: `\n <date-picker [value]="date" (change)="date = $event.detail"><\/date-picker>\n <p>\u9009\u4e2d\u7684\u65e5\u671f\uff1a{{ date }}<\/p>\n `\n})\nexport class AppComponent {\n date = '';\n}\n\n\/\/ app.module.ts \u8bb0\u5f97\u6dfb\u52a0 CUSTOM_ELEMENTS_SCHEMA\n<\/code><\/pre>\n7. \u603b\u7ed3<\/h2>\n
Web Components \u4e0e\u6846\u67b6\u96c6\u6210\u5e76\u4e0d\u590d\u6742\uff0c\u5173\u952e\u5728\u4e8e\u7406\u89e3\u6846\u67b6\u7684\u6570\u636e\u6d41\u548c\u4e8b\u4ef6\u673a\u5236\u3002\u901a\u8fc7\u672c\u6587\u7684\u5b9e\u8df5\uff0c\u4f60\u53ef\u4ee5\u5c06 Web Components \u65e0\u7f1d\u5d4c\u5165 React\u3001Vue \u6216 Angular \u9879\u76ee\u3002\u672a\u6765\uff0c\u968f\u7740\u6d4f\u89c8\u5668\u539f\u751f\u652f\u6301\u589e\u5f3a\uff0cWeb Components \u6709\u671b\u6210\u4e3a\u8de8\u6846\u67b6\u7ec4\u4ef6\u5171\u4eab\u7684\u4e8b\u5b9e\u6807\u51c6\u3002<\/p>\n
\u5ef6\u4f38\u9605\u8bfb<\/h3>\n\n- MDN Web Components \u6587\u6863<\/a><\/li>\n
- Custom Elements Everywhere<\/a> – \u68c0\u67e5\u6846\u67b6\u517c\u5bb9\u6027<\/li>\n
- Lit<\/a> – \u6784\u5efa Web Components \u7684\u73b0\u4ee3\u5e93<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
\u672c\u6587\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u5c06 Web Components \u4e0e\u73b0\u4ee3\u524d\u7aef\u6846\u67b6\uff08React\u3001Vue\u3001Angular\uff09\u65e0\u7f1d\u96c6\u6210\uff0c\u6db5\u76d6\u6570\u636e\u4f20\u9012\u3001\u4e8b\u4ef6\u5904\u7406\u3001\u751f\u547d\u5468\u671f\u7ba1\u7406\u7b49\u5173\u952e\u95ee\u9898\uff0c\u5e76\u63d0\u4f9b\u53ef\u8fd0\u884c\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[29,11,28,26,27,30],"class_list":["post-20","post","type-post","status-publish","format-standard","hentry","category-3","tag-angular","tag-react","tag-vue","tag-web-components","tag-27","tag-30"],"_links":{"self":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts\/20","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20"}],"version-history":[{"count":0,"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts\/20\/revisions"}],"wp:attachment":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}