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Article Introduction：The purpose of the HTML5 document outline algorithm is to understand the web page structure based on blocks and title elements, but its actual application has limitations. 1. The browser builds the page outline through nested block elements (such as,) and internal title levels (to). 2. In theory, it is allowed to be used in each block, and the browser automatically adjusts the level, but most screen readers still rely on the actual title tags; 3. Block elements create new title scopes, the first title defines the block level, and nested blocks generate sub-chains; 4. Reliance on this algorithm should be avoided in practice. It is recommended to use title tags in semantic order to ensure that the structure is clear and accessible.

2025-07-20 comment 0  762

Article Introduction：The scope attribute is an attribute of the tag in HTML that is used to clarify the scope of the table title cell. It tells the browser whether a table header is targeting a row or a column, thereby helping auxiliary technologies such as screen readers to accurately interpret the table structure. 1. Use scope="col" to indicate that the title is a column title, which is suitable for top titles such as "name", "age", etc.; 2. Use scope="row" to indicate that the title is a row title, which is suitable for content such as "user ID" at the beginning of each row; 3. In complex tables, you can combine rowspan with scope="rowgroup" or scope.

2025-07-18 comment 0  441

Article Introduction：To block browser ads, you can use ad blocking plug-ins (such as uBlockOrigin or AdGuard), enable the browser's own ad blocking features (such as Edge, Brave, and Safari), or modify the Hosts file to achieve system-level blocking. On mobile devices, you can use browsers or dedicated apps that support ad blocking. Specific steps: 1. Install the ad blocking plug-in; 2. Set up the built-in blocking function of the browser; 3. Modify the Hosts file to block the ad domain name; 4. Select a suitable browser or App on the mobile side to block ads.

2025-07-11 comment 0  912

Article Introduction：It is an element in HTML that defines the title of the web page, located in the tag, 1. Determines the name displayed on the browser tab; 2. Influences the inclusion and ranking of search engines; 3. Influences user click-through rate and bookmark title. If not set, the tab page may display a blank or default pathname, while a single-page application can modify the title through JavaScript. In SEO, it helps search engines judge content relevance, and the title should be concise, contains keywords, and no more than 60 characters to improve search visibility and user experience.

2025-06-29 comment 0  565

Article Introduction：To clear WordPress cache, you must first confirm the cache method before operating. 1. When using the cache plug-in, log in to the background to find the "Clear Cache" button provided by the plug-in (such as "DeleteCache" or "PurgeAll") and click to confirm the clearing. Some plug-ins support clearing separately according to the page; 2. In the absence of the plug-in, enter the cache directory under wp-content through FTP or file manager to delete the cache file. Note that the path may change depending on the host environment; 3. When controlling the browser cache, press Ctrl F5 (Windows) or Cmd Shift R (Mac) to force refresh the page, or clear the browser history and cache data, or use incognito mode to view the latest inside.

2025-08-03 comment 0  648

Article Introduction：Core points PostCSS offers a variety of plug-ins that provide polyfills for the latest CSS features, allowing developers to try out new features even if they lack extensive browser support. The postcss-nesting plug-in implements style rules nesting according to the W3C nested module proposal, introduces a new & nested selector, and refers to the parent selector. The postcss-custom-selectors plug-in allows defining duplicate selectors in variables, reducing code duplication and improving code maintenance. The postcss-custom-media and postcss-media-minmax plugins improve media queries to make them easier

2025-02-21 comment 0  428

Article Introduction：The problem of the middle click cannot open a new tab in the browser, which is usually caused by plug-in conflicts, browser settings abnormalities, mouse driver configuration or system shortcut keys. 1. First check whether all extension test functions can be temporarily disabled due to browser extensions (such as ad blocking plug-ins), and troubleshoot problems plug-ins one by one; 2. Troubleshoot the browser's own settings, cache exceptions or experimental function restrictions, try to clear cache, use incognito mode, or check event blocking behavior in the developer tool; 3. Check the mouse driver settings, confirm that the intermediate scroll wheel action has not been remapped, and test the mouse's performance on other devices or browsers; 4. If the problem is still not solved, technical users can simulate the intermediate click behavior through scripts or key mapping tools as an alternative.

2025-07-12 comment 0  494

Article Introduction：Autoprefixer is a tool that automatically adds vendor prefixes to CSS attributes based on the target browser scope. 1. It solves the problem of manually maintaining prefixes with errors; 2. Work through the PostCSS plug-in form, parse CSS, analyze attributes that need to be prefixed, and generate code according to configuration; 3. The usage steps include installing plug-ins, setting browserslist, and enabling them in the build process; 4. Notes include not manually adding prefixes, keeping configuration updates, prefixes not all attributes, and it is recommended to use them with the preprocessor.

2025-07-02 comment 0  311

Article Introduction：The main reason Chrome does not open the mailto: link directly in Gmail is that the default mail client is not set correctly or Gmail is not registered as an application that handles the mailto: protocol. Solutions include: 1. Set Gmail as the default mail application in Windows settings; 2. Enable Gmail protocol processing permissions in Chrome and set as default; 3. Manually click on the mailto: link to contact the Gmail registration protocol; 4. Use Chrome plug-in such as Mailto:forGmail to force jump. In most cases, it can be solved through system and browser settings, and the plug-in can be used as a backup solution.

2025-07-17 comment 0  322

Article Introduction：When the Chrome camera cannot work, you can follow the following steps to troubleshoot: 1. Check the browser permission settings to ensure that the relevant websites are allowed to access the camera; 2. Make sure that the camera is not occupied by other programs, close the relevant software and restart the browser; 3. Update the Chrome and operating system versions, check and update the camera driver; 4. Clear the website permission cache or use incognito mode to eliminate plug-in interference. These problems are usually caused by software settings and are not hardware failures. They can be solved by checking them in sequence.

2025-07-29 comment 0  391

Article Introduction：Yes, it is part of HTML5, but its use has gradually decreased and is controversial. Used to combine the main title with the subtitle so that only the highest level of titles are identified in the document outline; for example, the main title and subtitle can be wrapped in to indicate that they are only auxiliary titles rather than independent chapter titles; however, reasons why they are no longer widely used include: 1. The browser and screen readers are inconsistent support for them, 2. There are simpler alternatives such as using CSS to control styles, 3. The HTML document outline algorithm is not widely supported; despite this, it can still be considered in websites or documents with high semantic requirements; while in most cases, developers tend to use a single, manage styles through CSS and maintain clear title levels.

2025-07-21 comment 0  181

Article Introduction：Common reasons why HTML5 videos don't play in Chrome include format compatibility, autoplay policy, path or MIME type errors, and browser extension interference. 1. Videos should be given priority to using MP4 (H.264) format, or provide multiple tags to adapt to different browsers; 2. Automatic playback requires adding muted attributes or triggering .play() with JavaScript after user interaction; 3. Check whether the file path is correct and ensure that the server is configured with the correct MIME type. Local testing is recommended to use a development server; 4. Ad blocking plug-in or privacy mode may prevent loading, so you can try to disable the plug-in, replace the traceless window or update the browser version to solve the problem.

2025-07-10 comment 0  984

Article Introduction：When an error pops up with the Microsoft Edge browser "Aw, Snap!" is usually caused by web page content, extensions or system settings. Solutions include: 1. Confirm that it is a web page problem, try to refresh the page, change the access time, or use other browsers; 2. Check the extension plug-in, enter the settings to disable and troubleshoot one by one; 3. Clear the cache or reset the browser settings; 4. Turn off the hardware acceleration or update the graphics card driver. In most cases, it can be solved through simple operations.

2025-07-27 comment 0  228

Article Introduction：The main reasons why Chrome Remote Desktop cannot copy and paste include clipboard synchronization not enabled, cross-platform format compatibility issues, and plug-in or extension interference. 1. First, click "More Options" in the lower right corner of the remote connection interface to ensure that "Clipboard Synchronization" is enabled. If this option is not available, you should update the ChromeRDP plug-in and use the latest version of the browser to avoid using the privacy mode; 2. The format may be incompatible when copying across platforms, especially when copying rich text or pictures between different systems, it is recommended to test plain text copy first to confirm whether it is a format problem; 3. Some security plug-ins or ad blocking tools may block clipboard access. You can try to disable all extensions from local and remote ends, and reconnect the remote desktop through a traceless window. If necessary, check that

2025-07-15 comment 0  331

Article Introduction：When Chrome does not respect dark mode, it can check the system and browser settings in turn, use developer tools to troubleshoot media query problems, and force enabled through plug-ins or experimental functions. First, make sure that both the operating system and Chrome's dark mode are enabled correctly; secondly, use the developer tools to check whether prefers-color-scheme:dark is effective; if it is still invalid, you can try the DarkReader plug-in or enable Chrome's experimental forced dark mode function; website developers should use standard media queries, avoid hard-coded backgrounds, and test multi-device compatibility.

2025-07-15 comment 0  770

Article Introduction：Solutions to Microsoft Edge not loading pictures include: 1. Clear the browser cache, enter the settings and select "Privacy, Search and Services", click "Clear Browsing Data", check "Cookies and Other Website Data" and "Cached Pictures and Files"; 2. Check whether the pictures are manually blocked, view the image request status through the developer tools or disable the ad blocking plug-in; 3. Change the image display settings, turn off the "Use Data Saving Program" option and make sure that the experimental functions that affect image rendering are not enabled; 4. Try to reset or repair Edge, repair or reset the browser through system settings. In most cases, cleaning the cache or closing the extension can resolve the issue.

2025-07-19 comment 0  555

Article Introduction：The key to validating HTML5 code is to use the right tools and understand the verification results. 1. Online tools such as W3CMarkupValidationService can detect errors by entering URLs or codes; 2. Browser plug-ins such as HTMLValidator can check in real time during development; 3. Editor plug-ins such as VSCode's HTMLHint provide instant prompts; 4. Construction tools can integrate automatic verification steps; 5. Understand error information and help correct problems through searches; 6. Do not ignore warnings, improve semantics and accessibility, so that the web page is more standardized and robust.

2025-07-21 comment 0  372

Article Introduction：Edge browser does not enable the "Tag Search" function by default, but it can be achieved through the following methods: 1. Use the Ctrl Tab shortcut key to quickly switch and browse tabs; 2. Install third-party extension plug-ins such as TabSearch or OneTab to search for the currently opened tab title or URL through keywords; 3. Enable the "Vertical Tab" function and place the tab bar on the left, press Ctrl F to search for keywords in the tab bar. Among them, installing extension plug-ins is the most practical method, while native functions are suitable for situations where there are fewer labels. The overall operation is not complicated but is easily overlooked.

2025-07-27 comment 0  772

Article Introduction：How does WebShareAPI trigger sharing? Use the navigator.share() method and pass the data. Steps: 1. Check API availability; 2. Call navigator.share() and pass in title, text, url and other parameters; 3. Handle successfully or error situations. Note: HTTPS is only available, requires user operation triggering, and not all fields are required. Shareable content includes text, URL, and title, but does not support files. Error handling should distinguish between AbortError and provide alternative solutions such as copy links. In terms of browser support, the mobile terminal is better, the desktop terminal is limited, and iOSSafari partially supports it. When implementing, ensure that the data is concise and relevant.

2025-07-01 comment 0  900

Article Introduction：The standard way to add titles to images in HTML is to use and elements. 1. The basic usage is to wrap the image in the tag and add a title inside it, for example: this is the title of the image; 2. The reasons for using these two tags include clear semantics, convenient style control, and strong accessibility, which helps the browser, crawler and screen readers to understand the content structure; 3. Notes include that it can be placed up and down but needs to maintain logical order, cannot replace the alt attribute, and can contain multiple media elements to form a whole unit.

2025-06-24 comment 0  294