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連結 · 找到 79 個
從頁面中識別的傳出連結
| 連結 | Text |
|---|---|
| https://pathfinder.w3schools.com | Your W3Schools Dashboard My W3Schools |
| https://campus.w3schools.com/collections/course-catalog | W3Schools CertificatesGet Certified |
| https://spaces.w3schools.com/space/ | Go to Your W3Schools Space Spaces |
| https://profile.w3schools.com/logout | LogoutLogout |
| https://www.youtube.com/@w3schools | |
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| https://www.instagram.com/w3schools.com_official/ | |
| https://campus.w3schools.com | What is a Certificate? |
JavaScript 變數 · 找到 178 個
在頁面的視窗物件上載入的全域 JavaScript 變數是在函數外部宣告的變數，可從目前範圍內程式碼中的任何位置存取
| 名稱 | 類型 |
|---|---|
| 0 | object |
| 1 | object |
| 2 | object |
| 3 | object |
| 4 | object |
| 5 | object |
| onbeforetoggle | object |
| documentPictureInPicture | object |
| onscrollend | object |
| subjectFolder | string |
主控台記錄訊息 · 找到 1 條
記錄到 Web 主控台的訊息
| 類型 | 類別 | 記錄 |
|---|---|---|
| log | other |
|
HTML
頁面的原始 HTML 主體
<!DOCTYPE html><html lang="en-US"><head>
<title>Introduction to HTML</title>
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Web Dev.
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/modern-web-development-certification" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-dev" title="Web Development Certification">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/learn-modern-web-development" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-dev" title="Paid Web Development Course">
Course
</a>
</div>
<div data-name="web development" data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-application-development-certificates" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-app" title="Web Application Development Certification">
Web App
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-application-development-certificates" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-app" title="Web Application Development Certification">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/web-application-development-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-app" title="Paid Web Application Course">
Course
</a>
</div>
<div data-name="web app" data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-design-certification" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-design" title="Web Design Certification Exam">
Web Design
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-design-certification" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-design" title="Web Design Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/learn-web-design" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-design" title="Paid Web Design Course">
Course
</a>
</div>
</div>
</div>
<div class="w3-col l4 m6">
<div id="certified_javascript_links_list">
<h3 class="tnb-nav-section-title" data-heading="javascript_title">
JavaScript
</h3>
<div data-name="javascript" data-category="javascript" data-original-index="0">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/javascript-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-js" title="JavaScript Certification Exam">
JavaScript
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/javascript-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-js" title="JavaScript Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/javascript-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-js" title="Paid JavaScript Course">
Course
</a>
</div>
<div data-name="react" data-category="javascript" data-original-index="1">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/react-js-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-react" title="React.js Certification Exam">
React
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/react-js-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-react" title="React.js Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/react-js-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-react" title="Paid React.js Course">
Course
</a>
</div>
<div data-name="jquery" data-category="javascript" data-original-index="2">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/jquery-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-jquery" title="jQuery Certification Exam">
jQuery
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/jquery-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-jquery" title="jQuery Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/jquery-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-jquery" title="Paid jQuery Course">
Course
</a>
</div>
<div data-name="vue" data-category="javascript" data-original-index="3">
<a target="_blank" href="https://campus.w3schools.com/products/vue-js-certification-exam" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-vue" title="Vue Certification Exam">
Vue
</a>
<a target="_blank" href="https://campus.w3schools.com/products/vue-js-certification-exam" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-vue" title="Vue Certification Exam">
Certificate
</a>
</div>
</div>
<div class="certified_programs_links_list w3-hide-medium w3-hide-large">
<h3 class="tnb-nav-section-title" data-heading="programs_title">
Programs
</h3>
<div data-name="full access" data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/w3schools-full-access-course" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-course-fullaccess" title="Paid Full Access Course">
Full Access
<span class="ribbon-topnav ws-green" style="font-size: 13px; font-weight: normal">
Best Value!
</span>
</a>
</div>
<div data-name="front end" data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/front-end-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-front-end" title="Front End Certification Exam">
Front End
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/front-end-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-front-end" title="Front End Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/front-end-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-front-end" title="Paid Front End Development Course">
Course
</a>
</div>
<div data-name="web dev." data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/modern-web-development-certification" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-dev" title="Web Development Certification">
Web Dev.
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/modern-web-development-certification" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-dev" title="Web Development Certification">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/learn-modern-web-development" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-dev" title="Paid Web Development Course">
Course
</a>
</div>
<div data-name="web app" data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-application-development-certificates" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-app" title="Web Application Development Certification">
Web App
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-application-development-certificates" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-app" title="Web Application Development Certification">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/web-application-development-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-app" title="Paid Web Application Course">
Course
</a>
</div>
<div data-name="web design" data-category="programs">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-design-certification" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-design" title="Web Design Certification Exam">
Web Design
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-design-certification" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-design" title="Web Design Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/learn-web-design" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-design" title="Paid Web Design Course">
Course
</a>
</div>
</div>
<div class="certified_programs_links_list w3-hide-medium w3-hide-small" id="certified_programs_links_list_desktop">
<h3 class="tnb-nav-section-title" data-heading="programs_title">
Programs
</h3>
<div data-name="full access" data-category="programs" data-original-index="0">
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/w3schools-full-access-course" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-course-fullaccess" title="Paid Full Access Course">
Full Access
<span class="ribbon-topnav ws-green" style="font-size: 13px; font-weight: normal">
Best Value!
</span>
</a>
</div>
<div data-name="front end" data-category="programs" data-original-index="1">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/front-end-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-front-end" title="Front End Certification Exam">
Front End
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/front-end-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-front-end" title="Front End Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/front-end-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-front-end" title="Paid Front End Development Course">
Course
</a>
</div>
<div data-name="web dev." data-category="programs" data-original-index="2">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/modern-web-development-certification" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-dev" title="Web Development Certification">
Web Dev.
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/modern-web-development-certification" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-dev" title="Web Development Certification">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/learn-modern-web-development" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-dev" title="Paid Web Development Course">
Course
</a>
</div>
<div data-name="web app" data-category="programs" data-original-index="3">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-application-development-certificates" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-app" title="Web Application Development Certification">
Web App
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-application-development-certificates" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-app" title="Web Application Development Certification">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/web-application-development-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-app" title="Paid Web Application Course">
Course
</a>
</div>
<div data-name="web design" data-category="programs" data-original-index="4">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-design-certification" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-web-design" title="Web Design Certification Exam">
Web Design
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/web-design-certification" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-web-design" title="Web Design Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-best-sellers/products/learn-web-design" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-web-design" title="Paid Web Design Course">
Course
</a>
</div>
</div>
</div>
<div class="w3-col l4 m6">
<div id="certified_backend_links_list">
<br class="w3-hide-large w3-hide-small">
<h3 class="tnb-nav-section-title" data-heading="backend_title">
Backend
</h3>
<div data-name="python" data-category="backend" data-original-index="0">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/python-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-python" title="Python Certification Exam">
Python
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/python-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-python" title="Python Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/python-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-python" title="Paid Python Course">
Course
</a>
</div>
<div data-name="sql" data-category="backend" data-original-index="1">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/sql-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-sql" title="SQL Certification Exam">
SQL
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/sql-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-sql" title="SQL Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/sql-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-sql" title="SQL Python Course">
Course
</a>
</div>
<div data-name="mysql" data-category="backend" data-original-index="2">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/mysql-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-mysql" title="MySQL Certification Exam">
MySQL
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/mysql-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-mysql" title="MySQL Certification Exam">
Certificate
</a>
</div>
<div data-name="php" data-category="backend" data-original-index="3">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/php-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-php" title="PHP Certification Exam">
PHP
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/php-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-php" title="PHP Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/php-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-php" title="Paid PHP Course">
Course
</a>
</div>
<div data-name="java" data-category="backend" data-original-index="4">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/java-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-java" title="Java Certification Exam">
Java
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/java-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-java" title="Java Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/java-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-java" title="Paid Java Course">
Course
</a>
</div>
<div data-name="c" data-category="backend" data-original-index="5">
<a target="_blank" href="https://campus.w3schools.com/products/c-certification-exam" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-c" title="C Certification Exam">
C
</a>
<a target="_blank" href="https://campus.w3schools.com/products/c-certification-exam" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-c" title="C Certification Exam">
Certificate
</a>
</div>
<div data-name="c++" data-category="backend" data-original-index="6">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/c-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-cpp" title="C++ Certification Exam">
C++
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/c-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-cpp" title="C++ Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/c-course-1" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-cpp" title="Paid C++ Course">
Course
</a>
</div>
<div data-name="c#" data-category="backend" data-original-index="7">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/c-certificate-1" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-cs" title="C# Certification Exam">
C#
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/c-certificate-1" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-cs" title="C# Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/c-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-cs" title="Paid C# Course">
Course
</a>
</div>
<div data-name="r" data-category="backend" data-original-index="8">
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/r-course" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-r" title="Paid R Course">
R
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/r-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-r" title="Paid R Course">
Course
</a>
</div>
<div data-name="django" data-category="backend" data-original-index="9">
<a target="_blank" href="https://campus.w3schools.com/products/django-certification-exam" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-django" title="Django Certification Exam">
Django
</a>
<a target="_blank" href="https://campus.w3schools.com/products/django-certification-exam" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-django" title="Django Certification Exam">
Certificate
</a>
</div>
<div data-name="nodejs" data-category="backend" data-original-index="10">
<a target="_blank" href="https://campus.w3schools.com/products/nodejs-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-nodejs" title="NodeJS Certification Exam">
NodeJS
</a>
<a target="_blank" href="https://campus.w3schools.com/products/nodejs-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-nodejs" title="NodeJS Certification Exam">
Certificate
</a>
</div>
<div data-name="typescript" data-category="backend" data-original-index="11">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/typescript-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-typescript" title="TypeScript Certification Exam">
TypeScript
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/typescript-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-typescript" title="TypeScript Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/products/learn-typescript" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-typescript" title="Paid TypeScript Course">
Course
</a>
</div>
<div data-name="xml" data-category="backend" data-original-index="12">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/xml-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-xml" title="XML Certification Exam">
XML
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/xml-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-xml" title="XML Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/course-catalog/products/xml-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-xml" title="Paid XML Course">
Course
</a>
</div>
<div data-name="cyber security" data-category="backend" data-original-index="13">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/cyber-security-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-cyber-sec" title="Cyber Security Certification Exam">
Cyber Security
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/cyber-security-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-cyber-sec" title="Cyber Security Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/products/cyber-security-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-cyber-sec" title="Paid Cyber Security Course">
Course
</a>
</div>
<div data-name="accessibility" data-category="backend" data-original-index="14">
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/accessibility-certificate" class="w3-bar-item w3-button acctop-link ga-top-drop ga-top-drop-cert-accessi" title="Accessibility Certification Exam">
Accessibility
</a>
<a target="_blank" href="https://campus.w3schools.com/collections/certifications/products/accessibility-certificate" class="ws-btn acclink-text ga-top-drop ga-top-drop-cert-accessi" title="Accessibility Certification Exam">
Certificate
</a>
<a target="_blank" href="https://campus.w3schools.com/products/accessibility-course" class="ws-btn acclink-text ga-top-drop ga-top-drop-course-accessi" title="Paid Accessibility Course">
Course
</a>
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<a target="_top" href="html5_geolocation.asp">HTML Geolocation</a>
<a target="_top" href="html5_draganddrop.asp">HTML Drag/Drop</a>
<a target="_top" href="html5_webstorage.asp">HTML Web Storage</a>
<a target="_top" href="html5_webworkers.asp">HTML Web Workers</a>
<a target="_top" href="html5_serversentevents.asp" class="not-wired">HTML SSE</a>
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<h2 class="left"><span class="left_h2">HTML</span> Examples</h2>
<a target="_top" class="no-checkmark" href="html_examples.asp">HTML Examples</a>
<a target="_top" class="no-checkmark" href="html_editor.asp">HTML Editor</a>
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<a target="_top" class="no-checkmark" href="html_syllabus.asp">HTML Syllabus</a>
<a target="_top" class="no-checkmark" href="html_study_plan.asp">HTML Study Plan</a>
<a target="_top" class="no-checkmark" href="html_interview_prep.asp">HTML Interview Prep</a>
<a target="_top" class="no-checkmark" href="html_bootcamp.asp">HTML Bootcamp</a>
<a target="_top" class="no-checkmark" href="html_exam.asp">HTML Certificate</a>
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<h2 class="left"><span class="left_h2">HTML</span> References</h2>
<a target="_top" class="no-checkmark not-wired" href="/tags/default.asp">HTML Tag List</a>
<a target="_top" class="no-checkmark not-wired" href="/tags/ref_attributes.asp">HTML Attributes</a>
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<h1>HTML <span class="color_h1">Introduction</span></h1>
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<hr>
<p class="intro">HTML is the standard markup language for creating Web pages.</p>
<hr>
<!--start-->
<h2>What is HTML?</h2>
<ul>
<li>HTML stands for Hyper Text Markup Language</li>
<li>HTML is the standard markup language for creating Web pages</li>
<li>HTML describes the structure of a Web page</li>
<li>HTML consists of a series of elements</li>
<li>HTML elements tell the browser how to display the content</li>
<li>HTML elements label pieces of content such as "this is a heading", "this
is a paragraph", "this is a link", etc.</li>
</ul>
<!--stop-->
<hr>
<!--start-->
<h2>A Simple HTML Document</h2>
<div class="w3-example">
<h3>Example</h3>
<div class="w3-code notranslate htmlHigh">
<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>!DOCTYPE<span class="attributecolor" style="color:red"> html</span><span class="tagcolor" style="color:mediumblue">></span></span><br>
<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>html<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>head<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>title<span class="tagcolor" style="color:mediumblue">></span></span>Page Title<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/title<span class="tagcolor" style="color:mediumblue">></span></span><br>
<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/head<span class="tagcolor" style="color:mediumblue">></span></span><br>
<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>body<span class="tagcolor" style="color:mediumblue">></span></span><br><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>h1<span class="tagcolor" style="color:mediumblue">></span></span>My First Heading<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/h1<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>p<span class="tagcolor" style="color:mediumblue">></span></span>My first paragraph.<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/p<span class="tagcolor" style="color:mediumblue">></span></span><br><br>
<span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/body<span class="tagcolor" style="color:mediumblue">></span></span><br><span class="tagnamecolor" style="color:brown"><span class="tagcolor" style="color:mediumblue"><</span>/html<span class="tagcolor" style="color:mediumblue">></span></span>
</div>
<a target="_blank" href="tryit.asp?filename=tryhtml_intro" class="w3-btn w3-margin-bottom">Try it Yourself »</a>
</div>
<h3>Example Explained</h3>
<ul>
<li>The <code class="w3-codespan"><!DOCTYPE html></code> declaration defines
that this document is an HTML5 document</li>
<li>The <code class="w3-codespan"><html></code> element is the root element of an HTML
page</li>
<li>The <code class="w3-codespan"><head></code> element contains meta information about the
HTML page</li>
<li>The <code class="w3-codespan"><title></code> element specifies a title for the
HTML page (which is shown in the browser's title bar or in the page's tab)</li>
<li>The <code class="w3-codespan"><body></code> element defines the
document's body, and is a container for all the visible contents, such as
headings, paragraphs, images, hyperlinks, tables, lists, etc.</li>
<li>The <code class="w3-codespan"><h1></code> element defines a large heading</li>
<li>The <code class="w3-codespan"><p></code> element defines a paragraph</li>
</ul>
<!--stop-->
<hr>
<!--start-->
<h2>What is an HTML Element?</h2>
<p>An HTML element is defined by a start tag, some content, and an end tag:</p>
<div style="font-size:20px;padding:10px;margin-bottom:10px;">
<span class="spes_tagname">
<span class="spes_tag"><</span>tagname<span class="spes_tag">></span></span>
Content goes here...
<span class="spes_tagname">
<span class="spes_tag"><</span>/tagname<span class="spes_tag">></span></span>
</div>
<p>The HTML <strong>element</strong> is everything from the start tag to the end tag:</p>
<div style="font-size:20px;padding:10px;margin-bottom:10px;">
<span class="spes_tagname"><span class="spes_tag"><<span class="spes_tagname">h1</span>></span></span>My
First Heading<span class="spes_tagname"><span class="spes_tag"><</span>/h1<span class="spes_tag">></span></span>
</div>
<div style="font-size:20px;padding:10px;margin-bottom:10px;">
<span class="spes_tagname"><span class="spes_tag"><</span>p<span class="spes_tag">></span></span>My first paragraph.<span class="spes_tagname"><span class="spes_tag"><</span>/p<span class="spes_tag">></span></span>
</div>
<table class="ws-table-all notranslate">
<tbody><tr>
<th>Start tag</th>
<th>Element content</th>
<th>End tag</th>
</tr>
<tr>
<td><h1></td>
<td>My First Heading</td>
<td></h1></td>
</tr>
<tr>
<td><p></td>
<td>My first paragraph.</td>
<td></p></td>
</tr>
<tr>
<td><br></td>
<td><em>none</em></td>
<td><em>none</em></td>
</tr>
</tbody></table>
<div class="w3-panel w3-note">
<p><strong>Note:</strong> Some HTML elements have no content (like the <br>
element). These elements are called empty elements. Empty elements do not have an end tag!</p>
</div>
<!--stop-->
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<!--start-->
<h2>Web Browsers</h2>
<p>The purpose of a web browser (Chrome, Edge, Firefox, Safari) is to read HTML documents and display them
correctly.</p>
<p>A browser does not display the HTML tags, but uses them to determine how to display the document:</p>
<p><img alt="View in Browser" src="/html/img_chrome.png" class="w3-image"></p>
<!--stop-->
<hr>
<!--start-->
<h2>HTML Page Structure</h2>
<p>Below is a visualization of an HTML page structure:</p>
<div class="ws-grey" style="width:99%;border:1px solid grey;padding:3px;margin:0;"><html>
<div style="width:90%;border:1px solid grey;padding:3px;margin:20px"><head>
<div style="width:90%;border:1px solid grey;padding:5px;margin:20px"><title>Page title</title>
</div>
</head>
</div>
<div class="ws-grey" style="width:90%;border:1px solid grey;padding:3px;margin:20px;"><body>
<div class="w3-white" style="width:90%;border:1px solid grey;padding:3px;margin:20px;">
<div style="width:90%;border:1px solid grey;padding:5px;margin:20px"><h1>This is a heading</h1></div>
<div style="width:90%;border:1px solid grey;padding:5px;margin:20px"><p>This is a paragraph.</p></div>
<div style="width:90%;border:1px solid grey;padding:5px;margin:20px"><p>This is another paragraph.</p></div>
</div>
</body>
</div>
</html>
</div>
<div class="w3-panel w3-note">
<p><strong>Note:</strong> The content inside the <body> section
will be displayed in a browser. The content inside the <title> element will be
shown in the browser's title bar or in the page's tab.</p>
</div>
<!--stop-->
<hr>
<!--start-->
<h2>HTML History</h2>
<p>Since the early days of the World Wide Web, there have been many versions of HTML:</p>
<table class="ws-table-all notranslate">
<tbody><tr>
<th>Year</th>
<th>Version</th>
</tr>
<tr>
<td>1989</td>
<td>Tim Berners-Lee invented www</td>
</tr>
<tr>
<td>1991</td>
<td>Tim Berners-Lee invented HTML</td>
</tr>
<tr>
<td>1993</td>
<td>Dave Raggett drafted HTML+</td>
</tr>
<tr>
<td>1995</td>
<td>HTML Working Group defined HTML 2.0</td>
</tr>
<tr>
<td>1997</td>
<td>W3C Recommendation: HTML 3.2</td>
</tr>
<tr>
<td>1999</td>
<td>W3C Recommendation: HTML 4.01</td>
</tr>
<tr>
<td>2000</td>
<td>W3C Recommendation: XHTML 1.0</td>
</tr>
<tr>
<td>2008</td>
<td>WHATWG HTML5 First Public Draft</td>
</tr>
<tr>
<td>2012</td>
<td><a href="http://whatwg.org/html/" target="_blank">WHATWG HTML5 Living Standard</a></td>
</tr>
<tr>
<td>2014</td>
<td><a href="http://www.w3.org/TR/html5/" target="_blank">W3C Recommendation: HTML5</a></td>
</tr>
<tr>
<td>2016</td>
<td>W3C Candidate Recommendation: HTML 5.1</td>
</tr>
<tr>
<td>2017</td>
<td><a href="http://www.w3.org/TR/html51/" target="_blank">W3C Recommendation: HTML5.1 2nd Edition</a></td>
</tr>
<tr>
<td>2017</td>
<td><a href="http://www.w3.org/TR/html52/" target="_blank">W3C Recommendation: HTML5.2</a></td>
</tr>
</tbody></table>
<div class="w3-panel w3-note">
<p>This tutorial follows the latest HTML5 standard.</p>
</div>
<!--stop-->
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<h2 style="max-width:720px;position:relative;margin:auto;text-decoration: none;text-align:center">Video: HTML Introduction</h2>
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