current location：Home > Technical Articles > Daily Programming > HTML Knowledge
- Direction：
- All web3.0 Backend Development Web Front-end Database Operation and Maintenance Development Tools PHP Framework Daily Programming WeChat Applet Common Problem Other Tech CMS Tutorial Java System Tutorial Computer Tutorials Hardware Tutorial Mobile Tutorial Software Tutorial Mobile Game Tutorial
- Classify：
- PHP tutorial MySQL Tutorial HTML Tutorial CSS Tutorial
-
- How to use the srcset attribute for responsive images in HTML
- By providing image files of different resolutions or sizes, the srcset attribute enables the browser to select the most appropriate image based on the device's screen size, pixel density and network conditions, thereby improving page loading speed and visual quality. 1. When using the width descriptor (w), images of different widths need to be listed in the srcset (such as 480w, 800w), and the display width of the image at different breakpoints should be defined with the sizes attribute, so that the browser can select the best image based on this; 2. When using the pixel density descriptor (x), corresponding images can be provided for standard screens (1x), Retina screens (2x), etc., suitable for scenes where only pixel density needs to be adapted; 3. Combining srcset and sizes can achieve fully responsive images, and self-responsive images can be achieved in different layouts.
- HTML Tutorial . Web Front-end 840 2025-08-02 16:09:02
-
- What are block and inline elements in HTML
- Block-levelelementsstartonanewlineandtakefullwidth,whileinlineelementsflowwithintextandtakeonlyneededwidth;1.Blockelementsinclude,,–,,,,andrespectmargins,padding,anddimensions;2.Inlineelementsinclude,,,,,anddonotacceptwidth,height,oreffectivetop/bott
- HTML Tutorial . Web Front-end 438 2025-08-02 16:06:02
-
- How to add captions and subtitles with the HTML track element
- Using HTML elements can add subtitles and subtitles to videos to improve accessibility and user experience; 2. It must be placed in a tag, reference the WebVTT format file through src, and set properties such as kind, srclang, label to define the type, language and display name; 3. The WebVTT file must start with "WEBVTT", define the text display period in the time code format (hh:mm:ss.mmm), use --> to separate the start and end times, and separate the different subtitle blocks with blank lines; 4. Recommended practices include: use captions for hearing-impaired users and include sound descriptions, provide multi-language support, set the default attribute to ensure that one track is enabled by default, test compatibility across browsers, and verify
- HTML Tutorial . Web Front-end 459 2025-08-02 15:40:12
-
- HTML `srcdoc` Attribute for Iframes
- The srcdoc property is used in HTML tags, embedding HTML content directly instead of loading the page through external URLs. 1. It is often used to test HTML fragments, embed small independent documents, or avoid additional HTTP requests; 2. The difference from src is that src points to an external URL, while srcdoc directly contains HTML strings, and browsers preferentially use srcdoc; 3. When using it, you need to pay attention to content integrity, quotation mark escapes and complex pages. 4. It is compatible with mainstream browsers, but is not recommended for support scenarios of old browsers.
- HTML Tutorial . Web Front-end 696 2025-08-02 15:33:02
-
- What is the HTML iframe tag and how to use it
- TheHTMLtagembedsexternalcontentintoawebpage;1.UsethesrcattributetospecifytheURLofthecontenttoembed;2.SetwidthandheightattributesoruseCSSforsizing;3.Alwaysincludeatitleforaccessibility;4.Applythesandboxattributetoenhancesecuritywhenembeddinguntrustedc
- HTML Tutorial . Web Front-end 524 2025-08-02 15:23:01
-
- What is the novalidate attribute for an HTML form
- The novalidate attribute is used to disable the browser's default form verification; 1. After adding novalidate, the browser will not perform the default verification even if the input field contains constraints such as required, pattern, min, max, etc.; 2. The form will ignore whether the input is valid and submitted directly, which is suitable for custom verification using JavaScript, multi-step forms or temporary bypass verification in the development testing stage; 3. It is a Boolean property that does not require assignment, and acts on the entire form; 4. Remove novalidate to restore the normal verification behavior of the browser; therefore, novalidate enables developers to independently control the timing and method of form verification.
- HTML Tutorial . Web Front-end 496 2025-08-02 15:12:02
-
- What are the best practices for writing clean and readable HTML code
- Use semantic HTML elements to improve accessibility, SEO, and code clarity, such as alternatives
- HTML Tutorial . Web Front-end 1016 2025-08-02 14:49:02
-
- How to create an accessible skip link in an HTML page
- Placetheskiplinkasthefirstinteractiveelementinthebodywithhref="#main-content".2.HideitvisuallyusingCSSwithtop:-40pxandshowonfocusbysettingtop:6px.3.Ensurethetargetelement(e.g.,)hasid="main-content"andtabindex="-1"torecei
- HTML Tutorial . Web Front-end 944 2025-08-02 14:03:02
-
- How to use the HTML map and area tags for image maps
- ImagemapsinHTMLallowmultipleclickableareasonasingleimageusingtheandtags.1.Usethetagwiththeusemapattribute,settingitsvalueto#mapnametolinktheimagetoamap.2.Definetheelementwithanameattributematchingtheusemapvalue(withoutthe#).3.Inside,addtagstocreatecl
- HTML Tutorial . Web Front-end 592 2025-08-02 13:59:01
-
- How to use the data-* attributes in HTML for custom data
- The data-attribute is a feature in HTML5 used to store custom data on standard elements and does not affect the page layout; 1. Use the data-attribute to store private data on HTML elements, such as data-user-id; 2. Accessed through JavaScript's dataset attributes, such as element.dataset.userId; 3. You can also use getAttribute and setAttribute operations; 4. It can be used in CSS through attribute selector or attr() function; 5. It should avoid storing sensitive information, not abuse, or using style logic, and maintaining name semantics. These properties provide a flexible and semantic way of data delivery for scripts
- HTML Tutorial . Web Front-end 936 2025-08-02 13:44:02
-
- How to use the HTML article tag for content
- Thetagisusedforself-contained,independentlydistributablecontentlikeblogposts,newsarticles,comments,orreviews;2.Itshouldbeusedwhencontentmakessenseonitsown,canbesyndicated(e.g.,inRSSfeeds),andhasitsownauthororpublicationdate;3.Nestingelementsisappropr
- HTML Tutorial . Web Front-end 685 2025-08-02 12:41:02
-
- How to use the HTML picture element for art direction
- Theelementisusedforartdirectiontodeliverdifferentimagesbasedonscreensizeorlayout.1.Itcontainselementswithmediaqueriestospecifywheneachimageshouldbedisplayed,endingwitharequiredfallback.2.Commonusecasesincludemobilevs.desktopcropping,orientationchange
- HTML Tutorial . Web Front-end 718 2025-08-02 12:33:02
-
- How to use the formaction attribute on an HTML button
- Theformactionattributeoverridesaform'sdefaultactionURLwhenabuttonisclicked.2.Itisusedonsubmitbuttonstodirectformsubmissionstodifferentendpointslike"SaveDraft"or"Publish".3.Itonlyworkswithorinsidea.4.Youcancombineformactionwithform
- HTML Tutorial . Web Front-end 431 2025-08-02 12:13:02
-
- How to define the base URL for all relative URLs in an HTML page
- To define the base URL of all relative URLs in the HTML page, you need to use elements in part; 1. It will be placed in, so that all relative links are parsed based on the URL; 2. You can add the target="_blank" attribute to make all links open in the new tab page by default; 3. Note that each page can only have one tag and must be located in, the relative path in CSS is not affected by it, and relative requests from JavaScript may also need additional processing; 4. It is suitable for scenarios where the site is located in a subdirectory, a single page application or a server to generate HTML. All relative URLs are affected by it after setting, so you need to ensure that the base URL is correct.
- HTML Tutorial . Web Front-end 733 2025-08-02 11:28:02
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.
Player special effects
2024-02-29
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
