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How to make a full-page background image with HTML?

How to make a full-page background image with HTML?

To implement a full-page background image, you need to use CSS instead of just HTML; 1. Create a basic structure in HTML and link CSS files; 2. Set the html and body height to 100% in CSS, use background-image to specify the image path, background-size:cover ensures that the image covers the entire viewport, background-position:center makes the image centered, background-repeat:no-repeat prevents the image from tiling, optional background-attachment:fixed to achieve the background fixation effect when scrolling, and finally use CSS style and HTM

Aug 06, 2025 pm 02:52 PM
How to fix a 'NO_PAGES_AVAILABLE' error in Windows?

How to fix a 'NO_PAGES_AVAILABLE' error in Windows?

TheNO_PAGES_AVAILABLEerroriscausedbymemorymanagementissues,andtofixit:1.InstallWindowsupdatestoresolveknownbugs;2.Runmdsched.exetotestforfaultyRAMandreplaceorreseatdefectivemodules;3.UpdateorrollbackproblematicdriversviaDeviceManager;4.Disableoverclo

Aug 06, 2025 pm 02:51 PM
Windows has stopped this device because it has reported problems (Code 43) [Fixed]

Windows has stopped this device because it has reported problems (Code 43) [Fixed]

Restartyourcomputertoresolvetemporaryglitches;2.UninstallandreinstallthedevicethroughDeviceManagertotriggerautomaticdriverreinstallation;3.Updateormanuallyreinstalldriversfromthemanufacturer’swebsite;4.CheckforWindowsUpdatestoinstallsystem-levelfixes

Aug 06, 2025 pm 02:50 PM
What is AJAX in JavaScript?

What is AJAX in JavaScript?

AJAXenableswebpagestoupdatecontentdynamicallywithoutfullpagereloadsbyusingJavaScripttosendbackgroundrequeststoaserverandupdateonlyspecificpartsofthepage.1.ItcombinesJavaScript,theXMLHttpRequestobjectorfetchAPI,HTML/CSS,anddataformatslikeJSON.2.Whenau

Aug 06, 2025 pm 02:49 PM
ajax
How to use Sanctum for API authentication in Laravel?

How to use Sanctum for API authentication in Laravel?

Install Sanctum and run the migration; 2. Add Sanctum middleware to support SPA authentication; 3. Use the HasApiTokens feature in the User model; 4. Issue API tokens through the createToken() method; 5. The client carries the Bearer token in the Authorization header to make requests; 6. Use the auth:sanctum middleware to protect routes; 7. Call currentAccessToken()->delete() to cancel the current token; 8. Optionally allocate abilities to the token to achieve fine-grained permission control; LaravelSanctum is a lightweight, simple and easy

Aug 06, 2025 pm 02:47 PM
How to create a off-canvas menu in Bootstrap

How to create a off-canvas menu in Bootstrap

To create a responsive Bootstrap offshore menu, you must first use Bootstrap 5.2 and introduce CDN links; 1. Add buttons containing data-bs-toggle and data-bs-target attributes to trigger the menu; 2. Build offcanvas elements in HTML, set offcanvas-start and other control positions, and add navigation links in offcanvas-body; 3. Use data-bs-breakpoint to control responsive breakpoints, combine navbar to display regular navigation on large screens, and display offshore menus on small screens; 4. Select custom styles such as width and background color. Must ensure data-bs-t

Aug 06, 2025 pm 02:46 PM
How to fix Night Light being grayed out or not working in Windows?

How to fix Night Light being grayed out or not working in Windows?

UpdateyourgraphicsdriverviaDeviceManagerorthemanufacturer’swebsite,asoutdatedorgenericdriverslike"MicrosoftBasicDisplayAdapter"disableNightLight.2.EnsureWindowsisfullyupdatedbycheckingforupdatesinSettings>Update&Security>WindowsUp

Aug 06, 2025 pm 02:44 PM
windows
How to see your screen time report on your iPhone

How to see your screen time report on your iPhone

OpentheSettingsapponyouriPhoneandtapScreenTime.2.ViewyourScreenTimereport,whichdisplaysdailyandweeklyusage,includingtotaldevicetime,appcategoryusage,notificationsreceived,andpick-upfrequency.3.Switchbetween“ThisDay”and“Last7Days”fordifferenttimeframe

Aug 06, 2025 pm 02:43 PM
iphone screen time
C   this pointer example

C this pointer example

This pointer points to the current object that calls the member function, and is used to resolve variable name conflicts, implement chained calls and object self-comparison. 1. Access member variables through this-> in member functions to avoid conflicts with parameter names; 2. Return object reference through returnthis to realize chain calls and improve efficiency; 3. Use this to compare with the incoming object address to determine whether it is the same object; this can only be used in non-static member functions, its type is ClassNameconst, pointing to the current object and cannot be changed. *this represents the object itself, and this pointer plays an important role in handling member access, continuous calls and object comparison.

Aug 06, 2025 pm 02:42 PM
c++ this pointer
What is the difference between TRUNCATE and DELETE in Oracle?

What is the difference between TRUNCATE and DELETE in Oracle?

DELETEisaDMLcommandthatremovesrowsoneatatimewithfulllogging,supportsWHEREclauses,firestriggers,andallowsrollback;2.TRUNCATEisaDDLcommandthatdeallocatesdatablocks,performsminimallogging,removesallrowswithoutaWHEREclause,doesnotfiretriggers,andcannotbe

Aug 06, 2025 pm 02:41 PM
oracle sql
How to use Narrator in Windows 11

How to use Narrator in Windows 11

ToturnonNarrator,pressWin Ctrl Enter,gotoSettings>Accessibility>Narratorandtoggleiton,orsearchforNarratorintheStartmenu.2.EssentialcommandsincludeNarrator Mtoopenthemenu,Narrator /forallshortcuts,Narrator Spacetotogglescanmode,Ctrl Alt Spacetor

Aug 06, 2025 pm 02:40 PM
narrator
How to structure an HTML email for different clients

How to structure an HTML email for different clients

To ensure that HTML mail is displayed normally in different clients, table layout, inline style and compatibility structure must be used. The specific steps are: 1. Layout using nested tables instead of divs, because clients such as Outlook have poor support for modern CSS; 2. All CSS styles must be inlined to avoid using style tags in the head, and can be automatically inlined with tools such as Premailer; 3. Basic responsive design is achieved by setting the maximum width of 600px, single-column layout and limited media queries; 4. Use simplified HTML structure, including DOCTYPE, meta tags and body inline styles to avoid semantic tags and JavaScript; 5. Use tools such as Litmus to achieve multiple types of

Aug 06, 2025 pm 02:39 PM
How to fix a laptop touchpad not working in Windows?

How to fix a laptop touchpad not working in Windows?

First check whether the trackpad is disabled, and enable it through function keys (such as F6, F7, F9) or device options in the settings; 2. Restart the trackpad driver, which can be disabled and re-enabled in the Device Manager, or restarted after uninstallation to automatically reinstall; 3. Update or reinstall the driver, which can be automatically searched through the Device Manager, downloaded from the manufacturer's official website, or installed optional drivers through Windows updates; 4. Check and install system updates to ensure that Windows is the latest version to solve compatibility issues; 5. Run the hardware troubleshooting tool and use the built-in device diagnostic tool for the system to troubleshoot problems; 6. Check the BIOS/UEFI settings to confirm that the internal pointing device is not disabled; 7. Enter the safe mode to test the trackpad, if it works normally

Aug 06, 2025 pm 02:37 PM
Windows Installation Error 'The computer restarted unexpectedly or encountered an unexpected error' [Fixed]

Windows Installation Error 'The computer restarted unexpectedly or encountered an unexpected error' [Fixed]

CheckyourinstallationmediabyrecreatingthebootableUSBusingtheofficialMediaCreationToolorRufuswithFAT32formatandGPTforUEFI.2.DisableSecureBootandFastStartupinBIOS/UEFI,andensurebootmodeissettoUEFI.3.Disconnectallunnecessaryperipherals,leavingonlythekey

Aug 06, 2025 pm 02:36 PM
Understanding virtual functions and polymorphism in C

Understanding virtual functions and polymorphism in C

Virtual functions and polymorphism are the core mechanisms in C for implementing runtime method binding, allowing programs to call corresponding methods based on the actual type of the object, rather than their declared type, thus supporting flexible object-oriented design. 1. Virtual functions are member functions declared with virtual keywords in the base class, and can be rewritten in the derived class; 2. When polymorphism calls virtual functions through base class pointers or references, the correct function version will be dynamically selected according to the actual object type; 3. Pure virtual functions declared by = 0, making the class an abstract class, which cannot be instantiated, and is used to define the interface; 4.C realizes dynamic distribution through virtual tables (vtables) and virtual pointers (vptr). Each class containing virtual functions has a vtable storage function pointer, and each object contains a pointer to v.

Aug 06, 2025 pm 02:34 PM
How to run Windows PowerShell as an administrator

How to run Windows PowerShell as an administrator

TorunWindowsPowerShellasanadministrator,youmustuseelevatedprivilegestoexecutesystem-levelcommands.1.UsingtheStartMenu:PressWindowskey,typePowerShell,right-clicktheapp,andselectRunasadministrator,thenconfirmtheUACprompt.2.UsingtheRunDialog:PressWindow

Aug 06, 2025 pm 02:33 PM
How do you use the  and  elements in HTML5?

How do you use the and elements in HTML5?

Use tags for inline code, which is suitable for displaying small pieces of code such as function names or variables in text; 2. Use tags to retain whitespace characters and line breaks, which is suitable for displaying multi-line code blocks; 3. Nesting it in is the best practice to display formatted code blocks, which both retain format and have semantic significance; in addition, style beautification and syntax highlighting can be performed through CSS and JavaScript libraries, and combined and improved accessibility, which is a standard semanticization method for handling code display in HTML5.

Aug 06, 2025 pm 02:32 PM
How to turn on night light in Windows

How to turn on night light in Windows

Toreduceeyestrainbyfilteringbluelightinlow-lightenvironments,turnonNightLightinWindows10or11byright-clickingthedesktop,selecting"Displaysettings",thentogglingonNightLightunderthe"Brightness&color"or"Color"section.2.C

Aug 06, 2025 pm 02:31 PM
windows Night mode
How to pass environment variables to a Docker container?

How to pass environment variables to a Docker container?

Usethe-eflagtopassindividualenvironmentvariablesorinheritthemfromthehost;2.Use--env-filetoloadmultiplevariablesfromafilelikeenv.list;3.SetdefaultvaluesintheDockerfilewithENV,butavoidsecrets;4.InDockerCompose,definevariablesunderenvironmentoruseenv_fi

Aug 06, 2025 pm 02:30 PM
docker environment variables
How to use the CSS :is() pseudo-class?

How to use the CSS :is() pseudo-class?

:is() is a CSS pseudo-class used to simplify complex selectors, which reduces duplicate code and improves readability by grouping multiple selectors. 1. It receives a set of selectors as parameters, and can apply the style as long as the elements match any of them. For example, use: is(h1, h2, h3):hover to replace multiple duplicate:hover rules; 2. It can effectively simplify the style declaration of similar variants such as buttons and titles, such as: is(.btn-primary,.btn-secondary):focus to set the focus state uniformly; 3. Supports use with pseudo-classes, such as .tr:is(td,th):first-child to set the first column of the table bold. This feature is supported in modern browsers

Aug 06, 2025 pm 02:27 PM
css Pseudo class
How to include an SVG in an HTML document

How to include an SVG in an HTML document

Using tags can simply introduce external SVG files, suitable for static images, but cannot be controlled with CSS or JavaScript; 2. Directly inline SVG code can fully control styles and scripts, suitable for scenes that require interaction, but increase HTML volume; 3. Using tags to embed external SVG can support interaction while keeping files separated, suitable for complex and modular SVGs; 4. The method is not recommended, because there are accessibility and layout problems; 5. Using SVG through CSSbackground-image is suitable for decorative images, especially when used as backgrounds or icons. The appropriate method should be selected based on the need for interaction, performance requirements and maintenance to strike a balance between simplicity, reusability and control.

Aug 06, 2025 pm 02:25 PM
How to format a date in JavaScript

How to format a date in JavaScript

JavaScript provides a variety of date formatting methods: 1. Use toLocaleDateString() to generate localized readable strings, such as en-US returns "10/25/2023", de-DE returns "25.10.2023", and supports the configuration of year, month and day display formats through options; 2. Use toISOString() to obtain the UTC time of the standard ISO format, such as "2023-10-25T08:30:15.123Z", and the date part "2023-10-25" can be extracted after segmentation; 3.

Aug 06, 2025 pm 02:22 PM
buffered vs unbuffered channels go by example

buffered vs unbuffered channels go by example

Unbuffered channel must be sent and received simultaneously. 2. The buffered channel can temporarily store data, and sending and receiving do not have to be ready at the same time. 3. The unbuffered channel is suitable for strictly synchronous scenarios, and the buffered channel is suitable for decoupling producers and consumers. 4. In actual use, select types based on whether they need to be synchronized or controlled. Understand blocking behavior is the basis of Go concurrent programming.

Aug 06, 2025 pm 02:21 PM
go channels
What is a higher-order function in JavaScript?

What is a higher-order function in JavaScript?

Ahigher-orderfunctioninJavaScriptisafunctionthateithertakesoneormorefunctionsasargumentsorreturnsafunctionasitsresult—orboth.1.Functionsthatacceptotherfunctionsasargumentsincludearraymethodslikemap,filter,andforEach,wherethefunctionispassedtodefineel

Aug 06, 2025 pm 02:20 PM
What is the purpose of the final keyword in Java?

What is the purpose of the final keyword in Java?

ThefinalkeywordinJavarestrictschangestovariables,methods,andclassestoensureimmutabilityanddesignintegrity.1.Finalvariablescannotbereassignedafterinitialization,makingthemidealforconstantsandthreadsafety.2.Finalmethodscannotbeoverriddeninsubclasses,pr

Aug 06, 2025 pm 02:19 PM
java final keyword
How to use the flag package for simple CLI flags in Go

How to use the flag package for simple CLI flags in Go

TheflagpackageinGoisusedtoparsecommand-lineargumentswithbuilt-insupportforshortandlongflags,positionalarguments,andhelptextgeneration.2.Defineflagsusingfunctionslikeflag.String,flag.Int,andflag.Bool,specifyingname,defaultvalue,andusagemessage.3.Callf

Aug 06, 2025 pm 02:17 PM
How to build a shared library (.so or .dll) from a Go package

How to build a shared library (.so or .dll) from a Go package

Go supports building shared libraries that can be called by C, Python and other languages through buildmode=c-shared, but are not used for internal references between Go projects; 2. Write Go code located in packagemain, use //export annotation to export functions, the parameters and return values must be of type C.*, and import the "C" package and contain an empty main() function; 3. Use the gobuild-buildmode=c-shared-olib.somain.go command to generate .so (Linux), .dll (Windows) or .dylib (macOS) files and corresponding header files; 4. Package in C programs

Aug 06, 2025 pm 02:16 PM
What is the url input type in HTML5?

What is the url input type in HTML5?

TheURLinputtypeinHTML5isusedforfieldsrequiringawebaddressandisdefinedwith.2.IthelpsusersentervalidURLsbyenablingbuilt-invalidationandimprovinguserexperience,especiallyonmobiledeviceswherethekeyboardadaptstoshowURL-friendlykeyslike".com"and&

Aug 06, 2025 pm 02:15 PM
Troubleshooting 'Unidentified Network' error in Windows

Troubleshooting 'Unidentified Network' error in Windows

Restartyourrouterandcomputertoresolvetemporarynetworkglitches.2.RuntheNetworkTroubleshooterviathesystemtraytoautomaticallydetectandfixcommonissues.3.OpenCommandPromptasAdministratorandrunipconfig/release,ipconfig/renew,ipconfig/flushdns,netshwinsockr

Aug 06, 2025 pm 02:12 PM
How to use the atomic package for lock-free operations in Go

How to use the atomic package for lock-free operations in Go

Go's atomic package provides atomic operations of integers and pointers to achieve lock-free concurrency control. 1. Use atomic.Load and Store to ensure the safety of variable read and write; 2. Use atomic.Add to implement thread-safe counting; 3. Use CompareAndSwap to achieve conditional updates and cooperate with loop retry; 4. Use atomic.Value for complex types to ensure atomic exchange of immutable data; 5. Note that atomic does not support direct operation of bool and structures, and must ensure 64-bit value alignment. It should be given priority in simple scenarios. Complex logic still recommends mutex locks.

Aug 06, 2025 pm 02:10 PM