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- What scenarios can event modifiers in vue be used for?
- Vue.js event modifiers are used to add specific behaviors, including: preventing default behavior (.prevent) stopping event bubbling (.stop) one-time event (.once) capturing event (.capture) passive event listening (.passive) Adaptive modifier (.self)Key modifier (.key)
- Vue.js 342 2024-05-09 14:33:18
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- Does minix in vue have cache?
- No, Minix in Vue does not have caching. Minix is a global state management library that requires the use of external caching libraries (such as vuex-cache or Vuex-persistedstate) to implement caching functions. These libraries can persist Minix state to local storage or other persistence layers.
- Vue.js 448 2024-05-09 14:27:14
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- The role of the watch option in vue
- The watch option in Vue.js monitors changes in computed properties or data and runs user-defined callback functions when changes occur, which can be used to update the UI, perform asynchronous tasks, and control component behavior.
- Vue.js 745 2024-05-09 14:24:18
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- What is the caching mechanism of keepalive in vue
- The keep-alive caching mechanism in Vue includes: caching the state and DOM of specific subcomponents, optimizing performance and retaining dynamic data. Caching is triggered when a parent component renders for the first time, when a child component is manually activated, and when a cached component is activated again. Cache objects are stored inside keep-alive components, independent of Vue instance state. Invalidation mechanisms include re-rendering of parent components without sub-components, explicit destruction of sub-components, and cache limit. The benefits of caching include performance improvements, dynamic data retention, and smooth page transitions.
- Vue.js 703 2024-05-09 14:18:19
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- What function type is used to declare components in vue
- The function type of the component declared in Vue.js is defineComponent(), which contains the following options: data: component data object props: component attributes template: component HTML template methods: component methods
- Vue.js 511 2024-05-09 14:09:18
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- The order of execution of created and data in vue
- In Vue, the created lifecycle hook function is executed after data. This order is very important to ensure that the data is available in the created hook function.
- Vue.js 298 2024-05-09 14:06:15
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- What is the difference between created and mounted requests in vue?
- When making network requests in Vue, the mounted hook should be used because it ensures that the component is fully rendered in the page and can be interacted with by the user, whereas the created hook is not suitable for this purpose because the component's DOM is not mounted yet.
- Vue.js 447 2024-05-09 14:03:15
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- Which one is executed first, created or mounted in vue?
- In the Vue life cycle, the created hook is executed before mounted. The created hook is used to perform DOM-free operations when the component is instantiated, while the mounted hook is used to perform DOM-related operations after the component is mounted.
- Vue.js 367 2024-05-09 14:00:24
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- Destroyed in vue, what should I do if there is too much select data?
- The Destroyed hook is the last hook in the Vue instance life cycle and is triggered when the instance is destroyed. When the select component contains a large amount of data, the following measures can be taken to solve performance and user experience issues: 1. Paging or virtualization; 2. Grouping or filters; 3. Use multiple select components; 4. Optimize data format; 5. Load only the required data.
- Vue.js 796 2024-05-09 13:57:16
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- How to get the dispatch value in vue
- In Vuex, use dispatch to trigger mutations to change state data. Use dispatch to store a value: this.$store.dispatch('setValue', 10); use getters to derive data from state: getters: { getValue: (state) => { return state.value; } }Use mapGetters in the component to access the getter: computed: { ...mapGetters({ value: 'getValu
- Vue.js 580 2024-05-09 13:54:18
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- How to use await and async in vue
- In Vue.js, await and async are used to handle asynchronous requests and events. await can pause the execution of asynchronous functions until the Promise is resolved, making it convenient to write asynchronous code synchronously. async is used to mark a function as asynchronous, causing it to return a Promise that resolves after the function completes execution. When used together, the two can be used to get data from APIs, listen to user input events, and handle animations and transitions. The best time is during operations that require waiting for results, such as getting data from an API; it should not be used during operations that do not require waiting for results, such as performing calculations.
- Vue.js 696 2024-05-09 13:51:18
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- The difference between v-show and v-if in vue
- The main difference between v-show and v-if in Vue is: v-show: controls the display of elements by changing the display style attribute. It is lightweight and performance-friendly for elements that frequently switch to display/hide; but it will retain the space occupied by the elements. , may cause flickering. v-if: Insert or delete elements through conditions, affecting the layout flow and avoiding flickering; however, the cost of destroying and re-creating elements is high, and it is not suitable for frequently switching displayed/hidden elements.
- Vue.js 595 2024-05-09 13:48:17
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- What are the hook functions in vue
- Vue.js provides a variety of hook functions, including hooks in the creation, update, destruction and error handling phases, as well as hooks in rendering and other phases. These hooks allow developers to customize operations during the component life cycle for initializing data, handling DOM operations, cleaning up resources, catching errors, and prefetching data on the server side, thereby enhancing component behavior and application responsiveness and maintainability. .
- Vue.js 919 2024-05-09 13:45:24
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- Onmounted in vue corresponds to which life cycle of react
- onMounted in Vue corresponds to the useEffect lifecycle method in React, with an empty dependency array [], executed immediately after the component is mounted to the DOM.
- Vue.js 810 2024-05-09 13:42:16
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- The meaning of obj in the reactive() function in vue
- The obj parameter in the reactive() function in Vue represents the original object to be converted into a reactive proxy object. This function makes an object reactive by hijacking its properties and notifying Vue of changes, ensuring that the proxy object behaves the same as the original object, and creating a proxy object that can be observed by Vue. Usage scenarios include making data objects reactive, nesting within other reactive objects, and converting third-party library objects to reactive.
- Vue.js 456 2024-05-09 13:36:16
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