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  • What is the  element, and how do I use it to display a gauge?
    What is the element, and how do I use it to display a gauge?
    TheHTMLelementisusedtodisplayascalarmeasurementwithinadefinedrange.Itisidealforstaticgaugeslikediskusageortestscores,anddiffersfromtheelementwhichshowsdynamictaskcompletion.Touseeffectively:1)definekeyattributessuchasmin,max,value,andoptionallylow,hi
    HTML Tutorial . Web Front-end 924 2025-06-20 08:25:11
  • How do I test my website for accessibility using accessibility testing tools?
    How do I test my website for accessibility using accessibility testing tools?
    Totestyourwebsiteforaccessibility,combineautomatedtoolsandmanualchecks.1)UsebrowserextensionslikeWAVEorAxetoidentifybasicissuessuchasmissingalttextorlowcontrast.2)Trybuilt-indevelopertoolsinbrowserslikeChromeorFirefoxtoinspectelementsandensurescreenr
    HTML Tutorial . Web Front-end 312 2025-06-20 08:09:12
  • What are the key features introduced in HTML5?
    What are the key features introduced in HTML5?
    HTML5introducedkeyfeaturesthattransformedwebdevelopment.1.Semanticelementslike,,andimprovedstructure,readability,andaccessibility.2.Nativemultimediasupportviaandtagseliminatedrelianceonplugins.3.Enhancedformcontrolsincludingtype="email"andr
    HTML Tutorial . Web Front-end 418 2025-06-19 23:57:12
  • How do I use the  element to provide contact information?
    How do I use the element to provide contact information?
    TheelementinHTMLisusedtomarkupcontactinformationandshouldbeplacednearthebottomofapageorwithinan.1.Itincludesdetailslikeemail,phonenumber,website,andsocialmedialinks.2.ItimprovesaccessibilityandSEOwhenusedcorrectly.3.Avoidincludingunrelatedcontentlike
    HTML Tutorial . Web Front-end 652 2025-06-19 23:53:12
  • How do I create checkboxes in HTML using the  element?
    How do I create checkboxes in HTML using the element?
    To create an HTML checkbox, use the type attribute to set the element of the checkbox. 1. The basic structure includes id, name and label tags to ensure that clicking text can switch options; 2. Multiple related check boxes should use the same name but different values, and wrap them with fieldset to improve accessibility; 3. Hide native controls when customizing styles and use CSS to design alternative elements while maintaining the complete functions; 4. Ensure availability, pair labels, support keyboard navigation, and avoid relying on only visual prompts. The above steps can help developers correctly implement checkbox components that have both functional and aesthetics.
    HTML Tutorial . Web Front-end 845 2025-06-19 23:41:11
  • How do I access custom data attributes using JavaScript?
    How do I access custom data attributes using JavaScript?
    To access custom data properties in JavaScript, use the dataset property of the element. 1. Data attributes are custom attributes starting with data-, such as data-id, data-name, etc., used to store additional information in HTML elements; 2. In JavaScript, by selecting elements and accessing them using dataset attributes, the attribute name is removed from the data-prefix and converted to camel naming, such as data-user-role corresponding to dataset.userRole; 3. Commonly used to build dynamic UIs, such as buttons perform operations based on the data stored by the element itself; 4. Note that dataset returns always a string, which needs to be manually converted to a number or
    HTML Tutorial . Web Front-end 282 2025-06-19 23:17:12
  • How do I use the  element to represent the main content of a document?
    How do I use the element to represent the main content of a document?
    The reason for using tags is to improve the semantic structure and accessibility of web pages, make it easier for screen readers and search engines to understand page content, and allow users to quickly jump to core content. Here are the key points: 1. Each page should contain only one element; 2. It should not include content that is repeated across pages (such as sidebars or footers); 3. It can be used in conjunction with ARIA properties to enhance accessibility. Usually located after and before, it is used to wrap unique page content, such as articles, forms or product details, and should be avoided in, or in; to improve accessibility, aria-labeledby or aria-label can be used to clearly identify parts.
    HTML Tutorial . Web Front-end 378 2025-06-19 23:09:11
  • 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 239 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 665 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

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