What are fallthrough attributes 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

Computed has a cache, and multiple accesses are not recalculated when the dependency remains unchanged, while methods are executed every time they are called; 2.computed is suitable for calculations based on responsive data. Methods are suitable for scenarios where parameters are required or frequent calls but the result does not depend on responsive data; 3.computed supports getters and setters, which can realize two-way synchronization of data, but methods are not supported; 4. Summary: Use computed first to improve performance, and use methods when passing parameters, performing operations or avoiding cache, following the principle of "if you can use computed, you don't use methods".

Create the Modal.vue component, use the Composition API to define the props that receive modelValue and title, and use emit to trigger the update:modelValue event to achieve v-model bidirectional binding; 2. Use slot to distribute content in the template, supporting the default slot and named slot header and footer; 3. Use @click.self to close the pop-up window by clicking the mask layer; 4. Import the Modal in the parent component and use ref to control the display and hide it, and use it in combination with v-model; 5. Optional enhancements include listening to the Escape key close, adding transition animation and focus lock. This modal box component has good

VueCLIcanstillbeinstalledforlegacyprojectsusingnpminstall-g@vue/cli,butitisdeprecatedasof2023.1.EnsureNode.js(v14 )andnpmareinstalledbyrunningnode--versionandnpm--version.2.InstallVueCLIgloballywithnpminstall-g@vue/cli.3.Verifytheinstallationusingvue

Passing routing parameters using props can make components easier to reuse and test. There are three ways: ① Boolean mode: props:true passes routing parameters as props; ② Object mode: props:{key:value} to pass static values; ③ Function mode: props:(route)=>({}) can dynamically process parameters and pass them. The corresponding props need to be declared in the component, which is suitable for simple scenarios and improves component decoupling and maintainability.

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

Vuelifecyclehooksallowyoutoexecutecodeatspecificstagesofacomponent’sexistence.1.beforeCreaterunswhenthecomponentisinitialized,beforereactivityissetup.2.creatediscalledafterreactivityisestablished,makingdataandmethodsavailable,idealforAPIcalls.3.befor

Vue plug-in is used to extend application functions globally, while combinable functions are used to multiplex responsive logic among components. 1. The plug-in is installed when the application is started through app.use(), and can add global methods, components or configurations to affect the entire application; 2. Composition functions can be used on demand within the component through import, encapsulating and returning responsive state and logic, and only act on the call; 3. The plug-in is suitable for global services such as routing and state management, and the combination functions are suitable for reusable logic such as mouse position, form processing, etc.; 4. The plug-in may introduce global side effects, and the combination functions are well encapsulated and have no global pollution. Therefore, plug-ins or combinable functions should be selected based on whether global configuration is required. Both are often used in the same project to achieve a clear architecture