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What are the best practices for organizing components in a large Vue project?
Organizecomponentsbyfeatureordomainusingascalablefolderstructurewithseparatedirectoriesforcomponents,views,composables,andstores.2.CategorizecomponentsintoUI(reusable),layout,feature-specific,andpage-levelviewstoensureclearseparationofconcerns.3.UseP
Aug 06, 2025 am 11:24 AM
What is the difference between shallowReactive and reactive in Vue 3?
reactive provides deep responsiveness, and all nested properties can be traced; 2. shallowReactive is only responsive in top-level attributes, and changes in nested objects will not trigger updates; 3. Reactive is used in general state management, and shallowReactive is used in performance optimization or manual control; 4. The selection basis is whether Vue is required to deeply track object changes, and weigh convenience and performance.
Aug 06, 2025 am 10:20 AM
What is the difference between shallowRef and ref in Vue 3
Ref provides deep responsiveness, while shallowRef only provides shallowRef; 1. When using ref, all nested properties of the object will be converted into responsiveness, suitable for scenarios where deep response is required; 2. When using shallowRef, only the reassignment of .value will trigger updates, suitable for large objects or immutable data modes; 3. When performance is critical and deep response is not required, select shallowRef, and can be manually triggered with triggerRef; ref should be used by default, and shallowRef should be used only when optimization is required.
Aug 06, 2025 am 10:00 AM
How to use watchEffect in Vue 3?
watchEffect is used in Vue3 to automatically track responsive dependencies and perform side effects. Its core advantage is that it is automatic dependency collection without manually specifying the listening source. 1. It executes the incoming function immediately and automatically tracks the responsive data (such as ref, reactive) accessed in it, and re-executes when these data change. 2. Suitable for synchronization logic, automatic synchronization calculation (such as fullName dependency on firstName and lastName), and initialization side effects (such as logs and DOM updates). 3. Support asynchronous operations, but need to be cleaned with onInvalidate to avoid race conditions, such as using AbortController to interrupt outdated requests. 4. Can be passed
Aug 06, 2025 am 09:18 AM
What are the advantages of using composables in Vue 3
ComposablesenablereusabilityoflogiclikeAPIcallsorformhandlingacrosscomponentsviafunctionssuchasuseUserData().2.TheyimprovecodeorganizationbyseparatingconcernsintofocusedfunctionslikeuseAuth()oruseForm(),resultingincleaner,moremaintainablecomponents.3
Aug 06, 2025 am 08:27 AM
How to optimize bundle size in a Vue application
Build with production, code segmentation, externally load large libraries, adopt lightweight alternatives, analyze packaging volumes, optimize static resources, enable compression, ensure tree shake optimization, upgrade Vue3 and use Pinia to significantly reduce the packaging volume of Vue apps. 1. Use Vue production version to reduce the volume by more than 50%; 2. Use dynamic import to realize routes and component lazy loading; 3. Introduce lodash, moment and other libraries through CDN and externalize; 4. Use date-fns and dayjs to replace moment, and introduce lodash functions as needed; 5. Use report or visualizer to analyze dependency size; 6. Transfer image to WebP, compress, lazy loading and use srcset reasonably; 7
Aug 06, 2025 am 07:06 AM
How does the virtual DOM work in Vue
VueusesavirtualDOMtoefficientlyupdatetheuserinterfacebyfirstcreatingalightweightJavaScriptrepresentationoftherealDOM;1.Oninitialrender,VueconvertsthetemplateintoavirtualDOMtree(VNode)describingnodes,properties,andchildren;2.Whenreactivedatachanges,Vu
Aug 06, 2025 am 06:51 AM
How to create a global mixin in Vue?
Vue3 does not have a direct global mixin function, but similar effects can be achieved in other ways: 1. Use app.config.globalProperties to add global properties or methods to all components, which are suitable for OptionsAPI; 2. It is recommended to use composite functions (composables) to create reusable logic through ref, reactive, etc., which is suitable for Composition API and is clearer and tree-shaking; 3. For deep global states, you can use app.provide() and inject() for dependency injection; 4. Avoid using mixin, because it is prone to naming conflicts, implicit dependencies and poor type support. Final suggestions:
Aug 06, 2025 am 04:59 AM
How to handle events with v-on?
In Vue.js, v-on is used to listen for DOM events and trigger corresponding methods or inline JavaScript. Its effective usage includes: 1. Use v-on:eventName to bind events, such as @click calling methods; 2. Use @ abbreviated syntax to replace v-on to make the code more concise; 3. Pass custom parameters when calling methods, such as @cl.ick="sayHello('World')"; 4. Access native event objects through $event to achieve simultaneous transfer of additional data and event objects; 5. Use event modifiers such as .stop, .prevent, .self, and .once to control event behavior; 6.
Aug 06, 2025 am 04:17 AM
How to use the v-for directive correctly with a key in Vue
Alwaysuseauniqueandstablekeysuchasitem.idinsteadofthearrayindextoensureVuecanaccuratelytrackelementidentityduringre-renders.2.Avoidusingindexaskeyunlessthelistisstatic,hasnointernalstate,anditemsareneverreordered,added,orremoved,asitcanleadtoincorrec
Aug 06, 2025 am 01:25 AM
How to create a dynamic component using ?
Define components to be used dynamically, such as Home, About, Contact; 2. Import and register these components in the parent component, and bind them to implement dynamic rendering through the currentComponent variable in data; 3. Optionally set currentComponent directly as a component reference instead of a string to improve reliability; 4. Use wrapping dynamic components to cache state to avoid repeated rendering; 5. Dynamic components support normal delivery of props and listening events, and their usage is the same as that of ordinary components. This method is applicable in Vue2 and Vue3, and is an effective way to switch components in scenarios such as tab pages and modal boxes.
Aug 05, 2025 pm 07:49 PM
How to manage environment variables in a Vue application
Use.envfilesprefixedwithVUEAPPforVueCLIorVITE_forVitetodefineenvironmentvariablesfordifferentmodeslikedevelopment,production,orstaging.2.Accessvariablesincodeviaprocess.env.VUEAPPinVueCLIorimport.meta.env.VITE_inVite.3.Runbuildswith--modestagingtoloa
Aug 05, 2025 pm 07:33 PM
How to handle communication between sibling components in Vue
Useasharedparentcomponentbyliftingstateuptothecommonparent,passingdataviaprops,andhandlingupdatesthroughemittedevents;2.AvoideventbusesinVue3duetoremoved$on/$off/$emitmethodsandpotentialmaintenanceissues;3.UsePiniaorVuexforcentralizedstatemanagementi
Aug 05, 2025 pm 07:04 PM
How to create animated transitions on route changes with Vue Router?
Wrapping router-view uses transition component and sets name and mode attributes; 2. Define the corresponding CSS transition class to achieve animation effects, such as fade or slide; 3. Dynamically bind transitionName to achieve different routes by listening to route changes; 4. It is recommended to use mode="out-in" and trigger the transition of query parameter changes through key="$route.fullPath" when needed; finally, the routing animation can be realized through simple structure and style.
Aug 05, 2025 pm 06:33 PM
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