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

current location：Home > Technical Articles > Daily Programming > HTML Knowledge

  • How do I create a basic HTML document?
    How do I create a basic HTML document?
    To create a basic HTML document, you first need to understand its basic structure and write code in a standard format. 1. Use the declaration document type at the beginning; 2. Use the tag to wrap the entire content; 3. Include and two main parts in it, which are used to store metadata such as titles, style sheet links, etc., and include user-visible content such as titles, paragraphs, pictures and links; 4. Save the file in .html format and open the viewing effect in the browser; 5. Then you can gradually add more elements to enrich the page content. Follow these steps to quickly build a basic web page.
    HTML Tutorial . Web Front-end 236 2025-06-19 23:01:12
  • How do I specify the width and height of a video using the width and height attributes?
    How do I specify the width and height of a video using the width and height attributes?
    In HTML, the video player size can be set through the width and height attributes, but the video resolution is not changed, for example. 1. If only width or height is set, the other value will be automatically adjusted in proportion; 2. If the aspect ratio does not match the original proportion of the video, it will cause deformation; 3. To avoid deformation, you need to maintain the original ratio, such as 16:9 or 4:3; 4. It is more recommended to use CSS to control the size to achieve responsive layout, such as style="width:100%;max-width:640px;height:auto;", which is more flexible and suitable for mobile terminals.
    HTML Tutorial . Web Front-end 664 2025-06-19 22:53:11
  • What are the supported audio file formats (e.g., MP3, WAV, Ogg)?
    What are the supported audio file formats (e.g., MP3, WAV, Ogg)?
    Commonly supported audio formats include: 1.MP3, high compression rate and strong compatibility; 2.WAV, lossless sound quality is suitable for professional processing; 3.AAC, widely used in the Apple ecosystem; 4.FLAC, open source lossless compression format; 5.OGG, used for web pages and games; 6.ALAC, Apple lossless format; 7.AIFF, another lossless standard for Apple systems; 8.WMA, Microsoft discovered that it is less used. Pay attention to playing different systems: Windows supports MP3, WAV, WMA, AAC, FLAC, some require codecs; macOS and iOS support AAC, MP3, WAV, AIFF, ALAC, FLAC and some OGG; Android supports MP3, WAV, AA
    HTML Tutorial . Web Front-end 231 2025-06-19 22:41:11
  • How do I handle drag events (e.g., dragstart, dragover, drop)?
    How do I handle drag events (e.g., dragstart, dragover, drop)?
    The key to handling drag and drop events is to understand the event flow and correctly set the data delivery and target area response. 1. Drag and drop events include dragstart, drag, dragenter, dragover, drop and dragend. They each trigger and undertake different tasks at different stages. For dragstart, data is set, dragover control allows placement, and drop completes data reception; 2. To make elements draggable, draggable="true" must be set and use e.dataTransfer.setData() to pass data in dragstart; 3. The common reason why drop does not trigger is that it is not in draggo.
    HTML Tutorial . Web Front-end 405 2025-06-19 21:33:12
  • How do I use the and elements to group related form elements?
    How do I use the and elements to group related form elements?
    and for improving form accessibility and structural clarity. 1. Used to group relevant form controls, and add border wrapping elements by default; 2. As the title of the group, it provides semantic labels and assists the screen reader to understand the structure; 3. It is often suitable for related input items such as multi-select buttons and check boxes, such as gender selection, payment methods or survey questions; 4. It must be placed in the header when used, and ensure that each input item is included to enhance usability; 5. The style can be customized through CSS, but it should be avoided to affect visual hierarchy and accessibility. Rational use and make the form easier to understand and more structured.
    HTML Tutorial . Web Front-end 388 2025-06-19 21:21:11
  • How do I use a code formatter to automatically format my HTML code?
    How do I use a code formatter to automatically format my HTML code?
    Use the code formatting tool to automatically format HTML code. First, select tools that support HTML such as Prettier, VSCode built-in formatter or HTMLTidy; then install and configure the tools, including creating configuration files and adding scripts; then automatically formatting through settings, such as formatting during saving, running command lines or integrating Git hooks; finally pay attention to dealing with edge cases, such as mixed content, long line breaks and self-closing tag issues.
    HTML Tutorial . Web Front-end 342 2025-06-19 21:05:11
  • How do I add a table body using the element?
    How do I add a table body using the element?
    Using elements to wrap table data rows in web development can improve structural clarity and semantic clarity. The specific operations are as follows: 1. Ensure that the table skeleton is complete and includes basic structures such as, , and ; 2. Wrap the data lines (i.e.) that were originally written directly in the label; 3. Even if it is not used, it can be added separately to standardize the structure. In addition, the use can enhance semantic recognition, facilitate CSS style control and JavaScript dynamic operation, thereby improving the readability and maintenance efficiency of tables.
    HTML Tutorial . Web Front-end 374 2025-06-19 20:37:11
  • How do I use progressive enhancement to build websites that work on a wide range of devices and browsers?
    How do I use progressive enhancement to build websites that work on a wide range of devices and browsers?
    To build a website that works across devices and browsers, use a progressive enhancement strategy, first make sure that core content and features are available in the basic environment, and then gradually add enhancements. 1. Start with semantic HTML, use the correct tags to improve accessibility and compatibility; 2. Add CSS reasonably to keep the content readable in no style, and use media queries to adapt the layout; 3. Use JavaScript carefully to ensure that it is enhanced rather than necessary, so that the website can still run basically when the script fails; 4. Extensive tests cover old browsers, disable CSS/JS environments and real network conditions, and timely fix compatibility issues. This method ensures that all users can get a functional experience while supporting optimized display of modern devices.
    HTML Tutorial . Web Front-end 733 2025-06-19 20:21:11
  • How do I use the element to represent sample output from a computer program?
    How do I use the element to represent sample output from a computer program?
    TheelementinHTMLisusedtorepresentsampleoutputfromacomputerprogram.Itshouldbeusedwhendisplayingoutputsuchasconsolelogs,APIresponses,orscriptresultstoclearlydistinguishsystem-generatedtextfromothercontent.1.Bydefault,browsersstylewithamonospacefont,enh
    HTML Tutorial . Web Front-end 346 2025-06-19 20:01:11
  • How do I use the src attribute to specify the URL of the video file?
    How do I use the src attribute to specify the URL of the video file?
    Use the src attribute of the tag in HTML to embed videos. The specific methods are as follows: 1. Add the src attribute in the tag and specify the video file path, for example: 2. The common supported video formats include MP4, WebM and Ogg, and the appropriate format should be selected according to browser compatibility; 3. Ensure that the video file is correctly hosted and accessible through the URL, check the path, server MIME type configuration and access permissions; 4. You can use controls, autoplay, muted, loop and other attributes to improve the user experience. After correct settings, the browser can load and play videos smoothly.
    HTML Tutorial . Web Front-end 434 2025-06-19 19:53:12
  • How do I use the element to represent content that is tangentially related to the main content?
    How do I use the element to represent content that is tangentially related to the main content?
    It is a semantic tag in HTML5 used to wrap content indirectly related to the main content, commonly found in sidebars, notes, advertisements or supplementary instructions. 1. It is suitable for information that is less relevant to the main content but is still helpful for overall understanding, such as coffee maker recommendations in coffee articles. 2. It should be nested in a suitable location, such as inside or outside the block. 3. Styles can be controlled through CSS, such as using float or Flexbox layout. 4. When using it, you should avoid putting global elements such as navigation bar and footer, and you should also avoid multiple unrelated stacking. Rational use can improve the clarity, readability and accessibility of web page structure.
    HTML Tutorial . Web Front-end 262 2025-06-19 19:45:12
  • How do I use the element to provide multiple video sources for different browsers?
    How do I use the element to provide multiple video sources for different browsers?
    To play videos compatible in different browsers, you need to use HTML elements and provide multiple formats. The specific steps are as follows: 1. Add multiple elements in the tag, pointing to formats such as MP4, WebM and Ogg respectively; 2. Each should contain the correct type attributes, such as video/mp4, video/webm and video/ogg, so that the browser can quickly identify the supported formats; 3. Ensure that the server is configured with the correct MIME type to support the transmission of these video formats. The browser will try each source in turn, and if none of them are supported, a prompt message will be displayed. Mainstream browsers generally support MP4, so it is recommended to include at least two formats: MP4 and WebM to ensure widespread compatibility.
    HTML Tutorial . Web Front-end 813 2025-06-19 18:50:11
  • How do I use the value attribute to specify the value that will be submitted when an option is selected?
    How do I use the value attribute to specify the value that will be submitted when an option is selected?
    When submitting data using the value attribute correctly, you should clearly set the value value of each option, so that the data submitted to the server when the user selects the option is the set value. For example, define three options in the form as red, green and blue, and set the value to r, g, and b, then submit color=r when red is selected; if value is not set manually, the text between labels will be used as the submission value by default, such as color=red. There are three advantages to using the value attribute: 1. Submitting data is more concise; 2. The unified format is convenient for background processing; 3. The actual content can be hidden and displayed. Common misunderstandings include confusing the function of name and value. Name is used to identify select elements, val
    HTML Tutorial . Web Front-end 742 2025-06-19 18:09:12
  • HTML and Design: Creating the Visual Layout of Websites
    HTML and Design: Creating the Visual Layout of Websites
    How to create a website layout? 1. Use HTML tags to define the content structure, such as, ,. 2. Control styles and positions through CSS, using box model, float or Flexbox layout. 3. Optimize performance, reduce HTTP requests, use cache and optimize images, and ensure responsive design.
    HTML Tutorial . Web Front-end 288 2025-06-14 00:39:02

Tool Recommendations

jQuery enterprise message form contact code

jQuery enterprise message form contact code is a simple and practical enterprise message form and contact us introduction page code.
form button
2024-02-29

HTML5 MP3 music box playback effects

HTML5 MP3 music box playback special effect is an mp3 music player based on HTML5 css3 to create cute music box emoticons and click the switch button.

HTML5 cool particle animation navigation menu special effects

HTML5 cool particle animation navigation menu special effect is a special effect that changes color when the navigation menu is hovered by the mouse.
Menu navigation
2024-02-29

jQuery visual form drag and drop editing code

jQuery visual form drag and drop editing code is a visual form based on jQuery and bootstrap framework.
form button
2024-02-29

Organic fruit and vegetable supplier web template Bootstrap5

An organic fruit and vegetable supplier web template-Bootstrap5
Bootstrap template
2023-02-03

Bootstrap3 multifunctional data information background management responsive web page template-Novus

Bootstrap3 multifunctional data information background management responsive web page template-Novus
backend template
2023-02-02

Real estate resource service platform web page template Bootstrap5

Real estate resource service platform web page template Bootstrap5
Bootstrap template
2023-02-02

Simple resume information web template Bootstrap4

Simple resume information web template Bootstrap4
Bootstrap template
2023-02-02

Cute summer elements vector material (EPS PNG)

This is a cute summer element vector material, including the sun, sun hat, coconut tree, bikini, airplane, watermelon, ice cream, ice cream, cold drink, swimming ring, flip-flops, pineapple, conch, shell, starfish, crab, Lemons, sunscreen, sunglasses, etc., the materials are provided in EPS and PNG formats, including JPG previews.
PNG material
2024-05-09

Four red 2023 graduation badges vector material (AI EPS PNG)

This is a red 2023 graduation badge vector material, four in total, available in AI, EPS and PNG formats, including JPG preview.
PNG material
2024-02-29

Singing bird and cart filled with flowers design spring banner vector material (AI EPS)

This is a spring banner vector material designed with singing birds and a cart full of flowers. It is available in AI and EPS formats, including JPG preview.
banner picture
2024-02-29

Golden graduation cap vector material (EPS PNG)

This is a golden graduation cap vector material, available in EPS and PNG formats, including JPG preview.
PNG material
2024-02-27

Home Decor Cleaning and Repair Service Company Website Template

Home Decoration Cleaning and Maintenance Service Company Website Template is a website template download suitable for promotional websites that provide home decoration, cleaning, maintenance and other service organizations. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-05-09

Fresh color personal resume guide page template

Fresh color matching personal job application resume guide page template is a personal job search resume work display guide page web template download suitable for fresh color matching style. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-29

Designer Creative Job Resume Web Template

Designer Creative Job Resume Web Template is a downloadable web template for personal job resume display suitable for various designer positions. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28

Modern engineering construction company website template

The modern engineering and construction company website template is a downloadable website template suitable for promotion of the engineering and construction service industry. Tip: This template calls the Google font library, and the page may open slowly.
Front-end template
2024-02-28