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How to build and deploy a Vue application for production
Runnpmrunbuildtogenerateaproduction-readydistfolderwithoptimizedcode.2.Ensure.env.productioniscorrectlyconfiguredwithproductionenvironmentvariablesandremoveanydevelopment-onlycode.3.Optimizeperformanceviacodesplitting,lazyloading,assetcompression,ima
Aug 03, 2025 am 02:11 AM
How to use ref and reactive for state management in Vue 3
ref is used for basic types and scenarios where revalues need to be reassigned, reactive is used for objects and nested structures; 1. Ref accesses and modifys values through .value, and automatically unpacks in the template; 2. Reactive directly operates object properties without .value; 3. Ref can safely reassign the entire object, and reassigns reassignment will lose responsiveness; 4. Ref is recommended to use ref in array operations; 5. Deconstructing reactive objects requires to be used with toRefs to maintain responsiveness; both do not require .value in templates, and should be selected according to data form and usage habits, and is often used in actual development.
Aug 03, 2025 am 01:02 AM
How to set up a new Vue project using Vue CLI or Vite
TosetupanewVueproject,useeitherVueCLIorVite,withVitebeingtherecommendedchoiceformostnewprojectsduetoitsspeedandmoderntooling.2.ForVueCLI,installitgloballyusingnpminstall-g@vue/cli,createaprojectwithvuecreatemy-vue-app,selectdesiredfeatureslikeVue3,Ro
Aug 02, 2025 pm 12:26 PM
How to implement a dark mode theme switcher in Vue
Create a theme switching component, use the checkbox to bind the isDarkMode state and call the toggleTheme function; 2. Check localStorage and system preferences in onMounted to initialize the theme; 3. Define the applyTheme function to apply the dark-mode class to the html element to switch styles; 4. Use CSS custom properties to define bright and dark variables, and overwrite the default styles through the dark-mode class; 5. Introduce the ThemeSwitcher component into the main application template to display the toggle button; 6. Optionally listen to prefers-color-scheme changes to synchronize the system theme. This solution uses Vue
Aug 02, 2025 pm 12:15 PM
How to use watchers in Vue?
Scenarios using watcher include responding to data changes, performing asynchronous operations or complex calculations, and when computed cannot meet the needs; 2. In the Options API, the listener is defined through the watch option, supporting handler, immediate and deep configurations; 3. In the Composition API, the watch function is used to listen to ref, getter or multiple data sources, and deep and immediate can be configured; 4. The listener can be manually cleaned by calling the stop function returned by the watch; 5. The watch needs to clearly specify the listening source, while watchEffect automatically tracks dependencies but has weak control; 6. Best practices include:
Aug 02, 2025 pm 12:06 PM
How to implement parent-child component communication in Vue
The parent component passes data to the child component through props, and the child component receives and uses it through props; 2. The child component triggers a custom event to send data to the parent component through $emit, and the parent component handles it through event listening; 3. Use v-model to realize two-way binding between parent and child components, which is essentially the syntax sugar of prop binding and event transmission. Always follow the principle of "props down, events up" to ensure predictability and maintainability of component communication.
Aug 02, 2025 am 11:40 AM
How to create a custom component that supports v-model?
To create a custom component that supports v-model, you must define the modelValue property and issue an update:modelValue event. 1. Declare modelValueprop and update:modelValueemit in the component. 2. The parent component uses v-model to bind data. 3. Update the value through $emit when input. When using it, you can use defineProps and defineEmits to simplify the code. When supporting custom parameters such as v-model:title, you must modify the prop and event name correspondingly, and finally achieve the complete end of the two-way binding function.
Aug 02, 2025 am 10:32 AM
How to handle animations with TransitionGroup in Vue
TransitionGroupinVueenablessmoothanimationsfordynamiclistsduringadd,remove,orreorderoperations;1)Wraplistelementswith,usingaunique:key(preferablystableID);2)Settheelementprop(Vue3 )tocontrolwrappertag(e.g.,element="ul");3)Applytransitioncla
Aug 02, 2025 am 09:37 AM
How to use Teleport to move component DOM in Vue 3
Vue3's Teleport component is used to render part of the template content to the specified location of the DOM. 1. Use the to attribute to specify the target container such as body or custom elements; 2. It is often used in scenes where the modal boxes, prompt boxes, etc. need to be separated from the parent structure; 3. Ensure that the target elements exist and multiple Teleports can share the same target; 4. Events and responsiveness are still valid; 5. Display can be controlled in combination with v-if; 6. It is recommended to use independent containers to avoid conflicts in complex scenarios; this function solves the problems of CSS overflow hiding and hierarchical stacking, so that the UI can be displayed correctly according to visual needs.
Aug 02, 2025 am 07:42 AM
How to implement authentication in a Vue application
ChooseJWTorOAuthforauthentication;2.Createaloginformtosendcredentialsandstoretokenssecurely,preferablyusinghttpOnlycookiesinsteadoflocalStoragetopreventXSS;3.ProtectroutesusingVueRouter’sbeforeEachguardtoredirectunauthenticatedusers;4.Manageuserstate
Aug 02, 2025 am 07:24 AM
How to implement a search filter for a list of data in Vue?
Use Vue3's Composition API to implement search filtering function, the core is to dynamically filter the list through v-model binding search input and computed attribute; 2. Use toLowerCase() to achieve case-insensitive and partial matching; 3. You can listen to search terms through watch and combine setTimeout to achieve 300ms anti-shake to improve performance; 4. If the data comes from the API, you can obtain and maintain the list responsiveness asynchronously in onMounted; 5. Best practices include using computed instead of methods, retaining the original data, adding keys to v-for, and displaying a "not found" prompt when there is no result. This solution is simple and efficient, suitable for large
Aug 02, 2025 am 07:18 AM
How to use props to pass data to child components in Vue
Define props in child components, which can be declared and verified using array or object syntax; 2. Pass data to child components through v-bind or its abbreviation in parent components; 3. Support the passing of various data types such as strings, numbers, boolean values, arrays and objects; 4. Comply with props read-only principle, do not directly modify props in child components, but handle them through local data or computed attributes; 5. Use kebab-case to pass props in templates, even if camelCase is used when defining; 6. Always verify the types and necessity of props of reusable components to improve robustness. Using props correctly can ensure predictability and maintainability of communication between components.
Aug 02, 2025 am 05:00 AM
What is the difference between using Vuex and a simple global store
Vuexprovidesastructured,scalablestatemanagementsolutionwithcentralizedstate,mutations,actions,andgetters,whileasimpleglobalstoreisjustareactiveobjectwithoutenforcedpatterns.2.Aglobalstoreworksforsmallappsbutlacksdebuggingsupportandreactivitytrackingi
Aug 02, 2025 am 04:56 AM
How does Vue's reactivity system handle arrays?
Vue3fullysupportsreactivearraymutationsincludingindexassignmentandlengthchangesduetoProxy,whileVue2requiresusingVue.set()ormutatingmethodsbecauseitreliesonObject.definePropertyandarraymethodinterception;1.InVue2,directindexassignmentandlengthmodifica
Aug 02, 2025 am 04:34 AM
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