The ultimate cooperation between Vue and Excel: how to realize batch import and export of data

The life cycle hook of the Vue component is used to execute code at a specific stage. 1.created: Called immediately after the component is created, suitable for initializing data; 2.mounted: Called after the component is mounted to the DOM, suitable for operating the DOM or loading external resources; 3.updated: Called when the data update causes the component to be re-rendered, suitable for responding to data changes; 4.beforeUnmount: Called before the component is uninstalled, suitable for cleaning event listening or timer to prevent memory leakage. These hooks help developers accurately control component behavior and optimize performance.

To implement reusable Vue paging components, the following key points need to be clarified: 1. Define props including the total number of lines, the number of lines per page and the current page number; 2. Calculate the total number of pages; 3. Dynamically generate the displayed page number array; 4. Process the page number click event and pass it to the parent component; 5. Add styles and interaction details. Receive data through props and set default values, use the computed attribute to calculate the total number of pages, use the method to generate the currently displayed page number array, render buttons in the template and bind click events to trigger the update:current-page event, listen to the event in the parent component to update the current page number, and finally highlight the current page number through CSS and control the button status to improve the user experience.

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

Install VueI18n: Vue3 uses npminstallvue-i18n@next, Vue2 uses npminstallvue-i18n; 2. Create language files such as en.json and es.json in the locales directory, supporting nested structures; 3. Create instances through createI18n in Vue3 and mount them in main.js, Vue2 uses Vue.use(VueI18n) and instantiate VueI18n; 4. Use {{$t('key')}} interpolation in templates, use useI18n's t function in Vue3Composition API, and Vue2Options API

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".

To integrate GoogleMaps in Vue applications, the key steps are as follows: 1. Obtain GoogleMaps JavaScript API key and enable related services; 2. Dynamically load map scripts in the mounted lifecycle hook of Vue component and initialize the map; 3. Use ref to obtain map containers and configure map parameters such as center point and zoom level; 4. Optionally use vue-google-maps and other package libraries to simplify the development process; 5. Pay attention to cross-domain, performance optimization, style settings, and API quotas. The entire process requires special attention to script loading timing and DOM reference processing to ensure that the map is displayed correctly.

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

UseVue’serrorCapturedhookandapp.config.errorHandlertocatchcomponentandglobalerrors;2.Handleasyncerrorswithtry/catchinasyncmethodsandlistentounhandledrejectionevents;3.CreateerrorboundarycomponentsusingerrorCapturedtoisolateandmanageUIfailures;4.Integ