After following, you can keep track of his dynamic information in a timely manner
Effective front-end caching strategies need to be implemented in layers: 1. Browser cache controls local storage of static resources through HTTP headers such as Cache-Control, sets long max-age (such as one year) for files with hashings and uses immutable, and uses no-cache to ensure re-verification of HTML files; 2. ServiceWorker implements advanced cache logic, such as cache priority, stale updates or network priority policies, which are suitable for PWA and third-party resources, but cache content should be carefully selected to avoid storage waste; 3. CDN cache accelerates content distribution through global edge nodes, relying on the correct Cache-Control header, versioned URL and the active clearing API when necessary to manage cache validity
Jul 31, 2025 am 11:05 AM
Choose CompositionAPI or OptionsAPI? The answer depends on the size of the project, team habits and development needs. 1. When small projects or teams are familiar with Vue2, it is recommended to use OptionsAPI because its structure is clear, easy to understand and official continuous support; 2. When logical reuse or processing complex components, Composition API should be selected, which centralizes logic through combining functions to improve maintainability and reusability; 3. In terms of development experience, OptionsAPI is simpler and direct, suitable for teaching and rapid development, while Composition API requires understanding of responsive mechanisms, but it is better to cooperate with TypeScript; 4. Recommended to maintain old projects or teams that have just been upgraded.
Jul 31, 2025 am 11:03 AM
Use HTML5 built-in verification to provide basic verification (such as required, type, pattern and other properties), and basic form verification can be achieved without JavaScript; 2. Real-time feedback is achieved through JavaScript to listen to input, blur and submit events to improve user experience; 3. Use JavaScript to implement custom rules such as password strength and confirmation fields; 4. Always verify secondaryly on the server side, because front-end verification can be bypassed, back-end verification is the security guarantee.
Jul 31, 2025 am 10:54 AM
MySQL's binary log (binlog) has three formats: STATEMENT, ROW and MIXED. 1. The STATEMENT format records the SQL statement itself. The advantage is that the log size is small, but it may lead to inconsistency between master and slave; 2. The ROW format records row data changes, the master and slave consistency is high, but the log size is large and the writing pressure is high; 3. The MIXED format automatically selects STATEMENT or ROW, taking into account both efficiency and safety, and it is recommended to use by default. The format should be selected according to business needs: STATEMENT can be used in the reporting system, ROW can be used in high consistency scenarios, and MIXED can be used in balanced selection. Modifying the format can be achieved through commands or configuration files, and the master and slaves need to be consistent to avoid copy errors.
Jul 31, 2025 am 10:50 AM
The Schema.org tag helps search engines understand the structured data format of web page content through semantic tags (such as item scope, item type, itemprop); it can be used to define custom vocabulary, methods include extending existing types or using additionalType to introduce new types; in actual applications, keeping the structure clear, using official attributes first, testing code validity, and ensuring that custom types are accessible; precautions include accepting partial support, avoiding spelling errors, and choosing a suitable format such as JSON-LD.
Jul 31, 2025 am 10:50 AM
Use the Spaceship Operator () for intelligent comparison. It returns -1, 0 or 1 when the left operand is less than, equal to or greater than the right operand, respectively. It is suitable for array sorting, dictionary comparison of strings and arrays, and supports multi-level sorting; 2. Use the empty merge operator (??) to safely provide the default value, and return the left operand when the left operand exists and is not null. Otherwise, it returns the right operand. It can be called chained to achieve multi-level backoff to avoid warnings of undefined variables, which is safer than the ternary operator combined with isset(); 3. In actual scenarios, both can be combined, such as using ?? to process the default values of API parameters, and implement flexible sorting logic, thereby reducing redundant code, preventing errors and improving code readability.
Jul 31, 2025 am 10:47 AM
Use the Viper library to combine structures to manage Go application configurations. 1. Define the structured configuration structure and load it from files, environment variables and other sources through Viper; 2. Priority is given to using environment variables in the production environment and set default values and prefixes to avoid conflicts; 3. Verify the configuration at startup to ensure that the configuration is valid, and field verification can be combined with the validator library; 4. Sensitive information such as passwords and API keys should be managed through dedicated services such as environment variables or AWSSecretsManager, and will never be submitted to version control; ultimately, the configuration flexibility, security and environment isolation are achieved to ensure that the application runs reliably in different deployment environments.
Jul 31, 2025 am 10:46 AM
To get different values from SQL tables, there are several ways to do this. 1. Use the DISTINCT keyword to extract simple values, such as SELECTDISTINCTcategoryFROMproducts; 2. Replace with GROUPBY, especially when it involves aggregate functions; 3. Optimize performance by adding indexes, such as CREATEINDEXidx_categoryONproducts(category); 4. Use subqueries or CTE to organize logic in complex scenarios to improve readability and efficiency. Different methods are applicable in different situations. Daily use of DISTINCT is enough, but understanding other methods can help improve performance and flexibility.
Jul 31, 2025 am 10:46 AM
The key to index maintenance is to judge the fragmentation rate, select maintenance time, and update statistics. 1. Fragment rate
Jul 31, 2025 am 10:42 AM
ThefutureofreactStatanagement FavorsSsimplificationandscalabilityWithServer-ClientStatesParation, WhereserveStateishandledby LibrariesliketanstackqueryandsWr, WhileclientStateuseseslightweighttoolslikezustandorjotai.2.atomicStatodelsuChazjasjotai'Satoms
Jul 31, 2025 am 10:41 AM
UseServer-SideRendering(SSR)orStaticSiteGeneration(SSG)toensurecrawlersreceivefullyrenderedHTML,withSSRidealfordynamiccontentandSSGforstaticsites.2.IfSSR/SSGisn’tpossible,pre-rendercriticalpagesusingtoolslikePrerender.ioorReactSnaptogeneratestaticHTM
Jul 31, 2025 am 10:37 AM
User agent stylesheets are the default CSS styles that browsers automatically apply to ensure that HTML elements that have not added custom styles are still basic readable. They affect the initial appearance of the page, but there are differences between browsers, which may lead to inconsistent display. Developers often solve this problem by resetting or standardizing styles. Use the Developer Tools' Compute or Style panel to view the default styles. Common coverage operations include clearing inner and outer margins, modifying link underscores, adjusting title sizes and unifying button styles. Understanding user agent styles can help improve cross-browser consistency and enable precise layout control.
Jul 31, 2025 am 10:35 AM
Quantum secure encryption requires SQL to cooperate to implement key functions, including: 1. Encrypt the storage of key materials in key management and restrict access rights; 2. Use quantum hashing algorithms to store data digests to ensure integrity; 3. Use deterministic encryption or external search services to support encrypted data queries; 4. Enhance the security of audit logs to prevent sensitive information leakage.
Jul 31, 2025 am 10:31 AM
The automatic expansion of MySQL database can be achieved through read and write separation, multi-replica architecture, automatic scaling of cloud platform, and library and table division and middleware solutions. 1. Read and write separation. The multi-replica architecture distributes the read and write pressure through master-slave replication, cooperates with the proxy layer to realize traffic distribution, and automatically expands the capacity of the new slave library after detection delay, but pays attention to synchronization delay and node configuration; 2. The automatic scaling of the cloud platform depends on AWSRDS, Alibaba Cloud and other services, and can automatically increase and decrease read-only instances and monitor indicators to trigger expansion and shrinkage, but there is a risk of manufacturer locking; 3. Sub-repository and table Middleware such as MyCat and Vitess support horizontal expansion, which is suitable for large data scenarios, but brings challenges such as complex cross-repository query and high sharding strategy requirements. The choice of the plan should be combined with business scale, growth expectations and team capabilities.
Jul 31, 2025 am 10:26 AM
Installreact-i18nextandrelatedpackages;2.Configurei18nwithbackend,languagedetection,andReactintegration;3.CreateJSONtranslationfilesforeachlanguageunderpublic/locales;4.UsetheuseTranslationhooktoaccesstranslationsincomponentswithdynamicinterpolation;
Jul 31, 2025 am 10:26 AM
First,checkthepowersourceandcablesbyensuringconnectionsaresecure,testingoutlets,andswappingchargersorpowercables.2.Lookforsignsofpowerlikefanmovement,lights,orbeeps;ifabsent,suspectpowersupply,motherboard,orpowerbuttonissues.3.Fordesktops,testthePSUu
Jul 31, 2025 am 10:23 AM
Use meaningful variable names to encapsulate complex conditions to improve readability and maintainability; 2. Reduce nesting levels by returning in advance to make the main logic clearer; 3. Replace long lists of if-else or switches with lookup tables or maps to enhance simplicity and scalability; 4. Avoid negative conditions and give priority to forward logical expression; 5. Abstract public condition logic into independent functions to improve reusability and semanticity. Together, these practices ensure that the condition code is clear, easy to understand and subsequent maintenance.
Jul 31, 2025 am 10:21 AM
MySQL memory swap problem can be solved by checking memory usage, adjusting configuration, reducing memory consumption and optimizing system parameters. 1. Use free-m, vmstat, top and other commands to check whether swap and memory pressure occur; 2. Reasonably set parameters such as innodb_buffer_pool_size, max_connections, thread_stack, etc. to avoid memory overload; 3. Reduce background services, control the number of connections, and optimize large queries to reduce unnecessary memory usage; 4. Set swappiness to 0 or 1 and ensure that the swap partition is located on a high-performance disk to reduce active swap out.
Jul 31, 2025 am 10:21 AM
HTTP/3improveswebperformancebyreplacingTCPwithQUICoverUDPtoeliminatehead-of-lineblocking,enablingfasterhandshakes,independentstreamrecovery,andseamlessconnectionmigration;1.DevelopersshouldenableHTTP/3onserversusingsupportedplatformslikeNginx,Cloudfl
Jul 31, 2025 am 10:21 AM
Use clear naming and interface isolation, 2. Organize code according to functions and minimize main packages, 3. Improve testability through dependency injection, 4. Automatic formatting and static checking, 5. Use structured logs and context timeouts; build maintainable Go applications, follow the principles of concise, explicit error handling and automation, combined with reasonable structure and toolchain support, so that the code is easy to understand, expand and debug in the long run.
Jul 31, 2025 am 10:17 AM
Use net.Listen to create a TCP listener and listen for the specified port. 2. Accept the connection through listener.Accept and process it concurrently with goroutine. 3. Read client data in handleConnection and echo. 4. Use context and signal to achieve elegant closing and wait for the connection to complete. 5. Test the server through telnet or nc. Go's net package provides complete TCP programming capabilities, combined with goroutine, can easily achieve high concurrency, ensure connection shutdown through defer, and use context and WaitGroup to achieve elegant shutdown. The server is simple but scalable and supports custom protocols.
Jul 31, 2025 am 10:17 AM
To improve the accessibility of HTML tables, first use tags and match the scope attribute to clarify the relationship between the table header and the data cell; secondly, add hidden table descriptions through the aria-describedby attribute to enhance the understanding of screen readers; then ensure visual clarity, such as controlling the number of columns, using appropriate fonts and responsive layouts; finally, use semantic tags such as strengthening the table structure for developers and auxiliary technologies to handle.
Jul 31, 2025 am 10:15 AM
Text-decoration and text-decoration-line are different. The former is an abbreviation attribute used to set line types, colors and styles at the same time, which is suitable for defining all styles at once; the latter is only used to specify line types, which is suitable for controlling the line types without affecting the color or style. 1. Text-decoration can combine the line types, styles and colors, suitable for quick reset or custom link styles; 2. Text-decoration-line only controls the type of line, suitable for overlaying effects or retaining the default style details; 3. Using text-decoration may overwrite the settings of text-decoration-line because
Jul 31, 2025 am 10:11 AM
The key to writing a good SQL stored procedure is that it has clear structure and controllable logic, while taking into account both maintainability and performance. 1. Clarify responsibilities and avoid being large and complete. A stored process should only do one thing or a set of highly relevant operations. It is recommended to split long processes to improve maintainability; 2. The parameter design should be reasonable, use input and output parameters to enhance flexibility and reusability, and avoid hard coding; 3. Error processing and transaction control are essential to ensure data consistency and record error information for easy troubleshooting; 4. Performance optimization needs to avoid problems in advance, avoid frequent queries and process one by one, and use indexes and temporary tables reasonably.
Jul 31, 2025 am 10:10 AM
The choice of Nunjucks or Handlebars depends on the project requirements. 1.Nunjucks has stronger functions and is suitable for medium and large projects. It supports advanced features such as inheritance, macros, and filters. It has a steep learning curve but flexible; 2.Handlebars is simpler, suitable for small projects or static site generation, with less logic and easy to use; 3. There is not much difference in performance. Handlebars is slightly more efficient after precompilation, which is suitable for production environment deployment. Just select according to the project size and template logic complexity.
Jul 31, 2025 am 10:07 AM
CustomHooksinReactarereusablefunctionsthatstartwith"use"andcancallotherHookstosharestatefullogicacrosscomponentswithoutduplication.1.AcustomHook,likeuseCounteroruseLocalStorage,encapsulateslogicsuchasstatemanagementorsideeffectsandreturnsva
Jul 31, 2025 am 10:02 AM
WebSocketsaretheoptimalsolutionforreal-timeapplicationslikechatapps,livenotifications,andcollaborativetoolsbecausetheyenablefull-duplex,persistentcommunicationbetweenclientandserver.1.UnlikeHTTP,whichreliesonstatelessrequest-responsecycles,WebSockets
Jul 31, 2025 am 10:00 AM
SQL cursors are database objects used to process query result sets line by line, suitable for scenarios where each record is operated separately. It allows access to row data in order and performs specific logic such as sending notifications, maintaining context state, or building complex reports. Use cursors to follow the steps of declaring, opening, extracting, processing, closing and releasing. However, cursor performance is low and is not recommended for batch operations. Collection operations such as UPDATE, JOIN, aggregate functions, etc. are preferred. Before deciding to use cursors, you should evaluate whether the goal can be achieved through collection operations to avoid unnecessary resource consumption.
Jul 31, 2025 am 09:59 AM
To protect MySQL security in a multi-cloud environment, we need to start from four aspects: access control, permission management, encryption and audit. 1. Restrict access: Restrict the IP that can be connected to the database through firewall, security groups, VPC docking or dedicated lines to reduce public network exposure; 2. Strengthen user permission management: Create an independent account for each application and give minimum permissions, regularly clean zombie accounts, and use SHOWGRANTS to check permissions; 3. Data encryption: Enable SSL/TLS transmission encryption and TDE storage encryption, and unified management of keys through KMS; 4. Regular backup and audit: execute logical and physical backups and test the recovery process, enable audit log plug-in, centrally monitor operation behavior, and promptly detect exceptions.
Jul 31, 2025 am 09:57 AM
JavaScript's module system has undergone the evolution of CommonJS, AMD to ESModules, and eventually ESModules became the standard. 1.CommonJS is used on the server side and uses synchronous loading. It is suitable for Node.js but not for browsers; 2.AMD is designed for browsers and supports asynchronous loading, with lengthy syntax and ecological fragmentation; 3.ESModules is the official standard introduced by ES2015. It supports static analysis, tree-shaking and cross-platform compatibility. It can be used in browsers and Node.js, and interoperates with CommonJS. It has now been widely adopted by modern tools and frameworks and has become a unified module solution.
Jul 31, 2025 am 09:56 AM
