国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Table of Contents
? Basic structure: HTML
? Style design: CSS
? Explain the key points
? Scalable suggestions
Home Web Front-end CSS Tutorial css dropdown menu example

css dropdown menu example

Jul 30, 2025 am 05:36 AM
java programming

Yes, a common CSS drop-down menu can be implemented through pure HTML and CSS without JavaScript. 1. Use nested ul and li to build a menu structure; 2. Use the:hover pseudo-class to control the display and hiding of pull-down content; 3. Set position: relative to the parent li, and the submenu is positioned using position: absolute; 4. The submenu defaults to display: none, and becomes display: block when hovering; 5. Multi-level pull-down can be implemented through nesting, combined with transition, and add fade-in animations, and adapted to mobile terminals with media queries. The entire solution is simple and does not require JavaScript support, which is suitable for most website navigation.

css dropdown menu example

A common CSS drop-down menu (Dropdown Menu) can be implemented in pure HTML and CSS without JavaScript. Below is a simple and practical drop-down menu example suitable for navigation bar.

css dropdown menu example

? Basic structure: HTML

 <nav class="dropdown-menu">
  <ul>
    <li><a href="#">Home</a></li>
    <li class="dropdown">
      <a href="#" class="dropbtn">Products▼</a>
      <ul class="dropdown-content">
        <li><a href="#">Product One</a></li>
        <li><a href="#">Product 2</a></li>
        <li><a href="#">Product Three</a></li>
      </ul>
    </li>
    <li><a href="#">About</a></li>
    <li><a href="#">Contact</a></li>
  </ul>
</nav>

? Style design: CSS

 /* Basic menu style*/
.dropdown-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  background-color: #333;
  font-family: Arial, sans-serif;
}

.dropdown-menu > ul > li {
  display: inline-block;
  position: relative;
}

.dropdown-menu a {
  display: block;
  color: white;
  text-decoration: none;
  padding: 12px 16px;
}

.dropdown-menu a:hover {
  background-color: #555;
}

/* Pull-down button style*/
.dropdown .dropbtn {
  cursor: pointer;
}

/* drop-down content (hidden by default) */
.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #444;
  min-width: 160px;
  box-shadow: 0px 8px 16px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content li {
  display: block;
}

.dropdown-content a:hover {
  background-color: #666;
}

/* Mouse hover displays drop-down menu*/
.dropdown:hover .dropdown-content {
  display: block;
}

? Explain the key points

<ul><li> Clear structure : Use nested <ul> and <li> to build hierarchies.<li> :hover control display : The submenu is displayed when the mouse is hovered through the :hover pseudo-class of CSS.<li> Positioning key :<ul><li> .dropdown uses position: relative as a reference for positioning of submenu.<li> .dropdown-content uses position: absolute to position below the parent element.<li> Hide/Show : default display: none , becomes display: block when hovering.

? Scalable suggestions

<ul><li> Support multi-level pull-down? More .dropdown can be nested.<li> Mobile adaptation? You can add media queries or click events (JS required).<li> Animation effect? Add a fade:
 .dropdown-content {
  opacity: 0;
  top: 120%;
  transition: opacity 0.3s ease, top 0.3s ease;
}

.dropdown:hover .dropdown-content {
  display: block;
  opacity: 1;
  top: 100%;
}

Basically that's it. This example is simple and practical, suitable for most website navigation and does not rely on JavaScript.

The above is the detailed content of css dropdown menu example. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

PHP Tutorial
1502
276
How to handle transactions in Java with JDBC? How to handle transactions in Java with JDBC? Aug 02, 2025 pm 12:29 PM

To correctly handle JDBC transactions, you must first turn off the automatic commit mode, then perform multiple operations, and finally commit or rollback according to the results; 1. Call conn.setAutoCommit(false) to start the transaction; 2. Execute multiple SQL operations, such as INSERT and UPDATE; 3. Call conn.commit() if all operations are successful, and call conn.rollback() if an exception occurs to ensure data consistency; at the same time, try-with-resources should be used to manage resources, properly handle exceptions and close connections to avoid connection leakage; in addition, it is recommended to use connection pools and set save points to achieve partial rollback, and keep transactions as short as possible to improve performance.

Python for Data Engineering ETL Python for Data Engineering ETL Aug 02, 2025 am 08:48 AM

Python is an efficient tool to implement ETL processes. 1. Data extraction: Data can be extracted from databases, APIs, files and other sources through pandas, sqlalchemy, requests and other libraries; 2. Data conversion: Use pandas for cleaning, type conversion, association, aggregation and other operations to ensure data quality and optimize performance; 3. Data loading: Use pandas' to_sql method or cloud platform SDK to write data to the target system, pay attention to writing methods and batch processing; 4. Tool recommendations: Airflow, Dagster, Prefect are used for process scheduling and management, combining log alarms and virtual environments to improve stability and maintainability.

How to work with Calendar in Java? How to work with Calendar in Java? Aug 02, 2025 am 02:38 AM

Use classes in the java.time package to replace the old Date and Calendar classes; 2. Get the current date and time through LocalDate, LocalDateTime and LocalTime; 3. Create a specific date and time using the of() method; 4. Use the plus/minus method to immutably increase and decrease the time; 5. Use ZonedDateTime and ZoneId to process the time zone; 6. Format and parse date strings through DateTimeFormatter; 7. Use Instant to be compatible with the old date types when necessary; date processing in modern Java should give priority to using java.timeAPI, which provides clear, immutable and linear

Comparing Java Frameworks: Spring Boot vs Quarkus vs Micronaut Comparing Java Frameworks: Spring Boot vs Quarkus vs Micronaut Aug 04, 2025 pm 12:48 PM

Pre-formanceTartuptimeMoryusage, Quarkusandmicronautleadduetocompile-Timeprocessingandgraalvsupport, Withquarkusoftenperforminglightbetterine ServerLess scenarios.2.Thyvelopecosyste,

How does garbage collection work in Java? How does garbage collection work in Java? Aug 02, 2025 pm 01:55 PM

Java's garbage collection (GC) is a mechanism that automatically manages memory, which reduces the risk of memory leakage by reclaiming unreachable objects. 1.GC judges the accessibility of the object from the root object (such as stack variables, active threads, static fields, etc.), and unreachable objects are marked as garbage. 2. Based on the mark-clearing algorithm, mark all reachable objects and clear unmarked objects. 3. Adopt a generational collection strategy: the new generation (Eden, S0, S1) frequently executes MinorGC; the elderly performs less but takes longer to perform MajorGC; Metaspace stores class metadata. 4. JVM provides a variety of GC devices: SerialGC is suitable for small applications; ParallelGC improves throughput; CMS reduces

go by example defer statement explained go by example defer statement explained Aug 02, 2025 am 06:26 AM

defer is used to perform specified operations before the function returns, such as cleaning resources; parameters are evaluated immediately when defer, and the functions are executed in the order of last-in-first-out (LIFO); 1. Multiple defers are executed in reverse order of declarations; 2. Commonly used for secure cleaning such as file closing; 3. The named return value can be modified; 4. It will be executed even if panic occurs, suitable for recovery; 5. Avoid abuse of defer in loops to prevent resource leakage; correct use can improve code security and readability.

Comparing Java Build Tools: Maven vs. Gradle Comparing Java Build Tools: Maven vs. Gradle Aug 03, 2025 pm 01:36 PM

Gradleisthebetterchoiceformostnewprojectsduetoitssuperiorflexibility,performance,andmoderntoolingsupport.1.Gradle’sGroovy/KotlinDSLismoreconciseandexpressivethanMaven’sverboseXML.2.GradleoutperformsMaveninbuildspeedwithincrementalcompilation,buildcac

Java Concurrency Utilities: ExecutorService and Fork/Join Java Concurrency Utilities: ExecutorService and Fork/Join Aug 03, 2025 am 01:54 AM

ExecutorService is suitable for asynchronous execution of independent tasks, such as I/O operations or timing tasks, using thread pool to manage concurrency, submit Runnable or Callable tasks through submit, and obtain results with Future. Pay attention to the risk of unbounded queues and explicitly close the thread pool; 2. The Fork/Join framework is designed for split-and-governance CPU-intensive tasks, based on partitioning and controversy methods and work-stealing algorithms, and realizes recursive splitting of tasks through RecursiveTask or RecursiveAction, which is scheduled and executed by ForkJoinPool. It is suitable for large array summation and sorting scenarios. The split threshold should be set reasonably to avoid overhead; 3. Selection basis: Independent

See all articles