ThebestapproachfordatafetchinginReactdependsontheapp’scomplexityandneeds.1.Forsimplecases,useEffectisstraightforwardandeffective,especiallyoncomponentmountordependencychanges.2.Customhookshelpreuselogic,centralizeerror/loadinghandling,andcleanupcompo

Use tags to mark abbreviations or acronyms in HTML to improve accessibility and semantic structure; 1. It is a semantic tag, and the abbreviation is explained through title attributes, such as HTML; 2. When using it, you must ensure that the abbreviation is universal, accurate, and cannot be abused; 3. You can customize the style through CSS, with dotted underscores by default; 4. SEO has limited impact but frontal, avoid multiple nesting, pay attention to case and multi-language support.

InJavaScript,themaindifferencebetween==and===istypecoercion.1.==comparesvaluesafterconvertingtypesifnecessary,whichcanleadtounexpectedresults.2.===comparesbothvalueandtypewithoutconversion,makingitmorepredictable.Forexample,5=='5'istruebut5==='5'isfa

When developing applications using Vue.js, you need to pay attention to security risks such as XSS and CSRF. 1. Avoid using v-html to prevent XSS attacks. If you want to display rich text, you should strictly filter the content; 2. Front-end routing control cannot replace back-end verification, and sensitive data access should be validated in the back-end; 3. The back-end should enable the CSRF protection mechanism and correctly configure the CORS and withCredentials options; 4. Do not store sensitive information such as API keys on the client. You should request through the back-end proxy or only store non-sensitive configurations. Developers should follow best practices to improve the overall security of applications.

There are three reasons for using elements: improving semantic structure, enhancing barrier-free experience, and clearly identifying core content. First, the code is more structural and meaningful by wrapping the main content, which is easy to maintain and machine parsing; second, it allows the screen reader to jump directly to the core content to avoid duplicate navigation information; finally, it is used to define the unique core area of the page and cannot be nested multiple times. When used, it should be independent of, and can be used to improve compatibility with ARIA roles.

Common problems with dependency arrays when using useEffect include: 1. Not including all dependencies causes closure problems, and all variables used in effect should be added to the array; 2. Adding unstable dependencies to trigger an infinite loop, and useMemo or useCallback should be used to optimize or remove components; 3. Overuse use of useEffect to deal with derived state, and useMemo should be used instead; 4. Ignore the cleaning logic of asynchronous operations and cancel unfinished tasks in return. Correct handling of dependencies and side-effect behaviors can avoid most problems.

ThedownloadattributeinHTMLworksbyforcingafiletobedownloadedratherthandisplayedinthebrowser.Whenaddedtoananchor()tag,ittellsthebrowsertoprompttheusertosavethelinkedresourceasafileinsteadofnavigatingtoit.Itcanalsobeusedtospecifyacustomfilenameforthedow

The key to using v-for to render a list in Vue is to master the basic usage, the importance of binding keys, and precautions. 1. v-for can traverse arrays or objects to render DOM nodes, such as {{item.name}}; 2. Must bind: key and it is recommended to use a unique ID instead of index to avoid reuse problems; 3. When traversing objects, the parameter order is (value, key, index); 4. Note that the variant method (push/pop/shift/unshift/splice/sort/reverse) will trigger updates, while filter/map/slice needs to be reassigned; 5. You can use v-for on the label to avoid additional wrapping elements.