Dynamic Layouts with Vue jsx: A Guide to Flexible and Maintainable UIs-JS Tutorial-php.cn

Dynamic Layouts with Vue jsx: A Guide to Flexible and Maintainable UIs

Written by Dubem Izuorah

Have you ever spent hours tweaking the same web layout across multiple pages or struggled to make your UI adapt to changing data without breaking? These common challenges can slow down your development process and lead to frustrating, error-prone code.

Introducing Dynamic Layouts

By creating layouts at runtime based on data, you can build flexible, maintainable, and scalable applications that adapt effortlessly to changes. This approach,called Dynamic layouts , eliminates the need for repetitive HTML edits, allowing your UI to stay in sync with your data seamlessly.

In this article, we’ll explore how dynamic layouts can transform your development workflow and elevate your projects.

Why Use Dynamic Layouts?

Dynamic layouts are particularly beneficial when content frequently changes or when displaying responsive UIs that pull from APIs, other data sources, or respond to user interactions.

Benefits of Dynamic Layouts

Flexibility : Easily adjust UI components based on underlying data without modifying HTML or template code.
Maintainability : Adhere to the DRY (Don’t Repeat Yourself) principle, reducing repetitive code and simplifying maintenance.
Scalability : Manage your UI programmatically, allowing for easy updates, additions, or removals of items.
Error Reduction : Minimize manual HTML edits, decreasing the likelihood of errors.
Enhanced Responsiveness : Dynamically show or hide UI elements based on conditions, making the interface more responsive to user interactions or data changes.

Practical Scenarios for Dynamic Layouts

Dynamic layouts shine in various real-world scenarios, such as:

Forms : For form-heavy apps, it might be best to abstract you form fields into a computed property paired with some validation library. In the layout you can loop through your property to conditionally show form fields and properties like labels, class names, validation messages etc.
Blog Post Lists : Manage and update each post card’s content dynamically based on its data.
Content Blocks : Organize and display diverse content elements efficiently.
User Lists, Navigation Items, Dashboard Panels : Ensure consistent styling and easy adjustments without manual HTML updates.
Website Sections : Dynamically generate sections to maintain a cohesive and easily adjustable layout.

By generating these elements dynamically, you ensure consistency, simplify adjustments, and maintain a clean codebase.

Building a Dynamic Navbar

Let’s gain hands-on experience with dynamic layouts by building a dynamic navbar. For reference, here is the Github repo for this tutorial.

Requirements

Imagine you’re developing a payment platform and need to create a clean, extensible navbar component as shown in the screenshots below:

Dynamic Layouts with Vue jsx: A Guide to Flexible and Maintainable UIs

Navbar when a user is logged in

Dynamic Layouts with Vue jsx: A Guide to Flexible and Maintainable UIs

Navbar with no user logged in

Setting up the Environment

To focus on dynamic layouts, we won’t delve into environment setup details here. You can find the complete code samples in our GitHub repository.

Technologies Used:

Nuxt — Vue framework
Nuxt TailwindCSS — Styling
Phosphor-icons Vue — Icon components

Static Approach

A static Navbar component involves numerous HTML tags and properties, making the code hard to read and maintain.

Updating such a layout is error-prone, especially with repetitive elements sharing the same properties or styling.

While a static approach is useful for drafting layouts, dynamic layouts are preferable for maintainability and collaboration.

Example of a Static Navbar:

? App.vue

<template>
  <nav class="w-screen border-b py-4">
    <div class="container mx-auto flex items-center gap-10">
      <!-- Logo -->
      <NuxtLink href="/" class="flex items-center">
        <img src="https://logo.clearbit.com/google.com" class="w-10 h-10 object-contain" />
      </NuxtLink>

<!-- Dashboard or Home Link -->
      <NuxtLink v-if="user" href="/dashboard" class="flex items-center">
        <PhGauge size="24" />
        <span class="ml-2">Dashboard</span>
      </NuxtLink>
      <NuxtLink v-else href="/home" class="flex items-center">
        <PhHouseSimple size="24" />
        <span class="ml-2">Home</span>
      </NuxtLink>
      <!-- Spacer -->
      <div class="ml-auto"></div>
      <!-- Add Funds Button (Visible only when user is authenticated) -->
      <button v-if="user" class="flex items-center">
        <span class="text-white bg-green-500 px-4 py-2 rounded-lg">Add Funds</span>
      </button>
      <!-- User Avatar (Visible only when user is authenticated) -->
      <div v-if="user" class="flex items-center">
        <Avatar src="https://randomuser.me/api/portraits/men/40.jpg" />
        <span class="ml-2">Dubem Izuorah</span>
      </div>
      <!-- Auth Button -->
      <button class="flex items-center" @click="user = !user">
        <span>{{ user ? 'Logout' : 'Login' }}</span>
      </button>
    </div>
  </nav>
  <main class="h-64 bg-gray-100 flex justify-center pt-10 text-xl">App Here</main>
</template>
<script setup lang="jsx">
import { ref } from "vue";
import { NuxtLink, Avatar } from "#components";
import { PhGauge, PhHouseSimple } from "@phosphor-icons/vue";
// Simulate user authentication status
const user = ref(true);
</script>

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While static layouts may suffice for simple interfaces, dynamic layouts offer superior maintainability and scalability.

Dynamic Approach

To create a dynamic navbar, we’ll want to define our layout data and generate UI components based on this data.

Defining the Data

Instead of hard-coding each menu item, we can create a list of menu items in our script with properties like title, image, to, icon, render, and class. This allows us to dynamically generate the navbar based on the data.

? App.vue

<script setup lang="jsx">
// Import necessary components
import { ref, computed } from "vue";
import { NuxtLink, Avatar } from "#components";
import { PhGauge, PhHouseSimple } from "@phosphor-icons/vue";

// Simulate user authentication status
const user = ref(true);
// Define menu items
const items = computed(() => [
  {
    key: "logo",
    image: "https://logo.clearbit.com/google.com",
    href: "/"
  },
  {
    icon: user.value ? PhGauge : PhHouseSimple,
    key: "dashboard",
    title: user.value ? "Dashboard" : "Home",
    to: user.value ? "/dashboard" : "/home",
  },
  {
    key: "spacer",
    class: "ml-auto",
  },
  {
    key: "add-funds",
    render: () => <span class="text-white bg-green-500 px-4 py-2 rounded-lg">Add Funds</span>
  },
  {
    key: "user",
    render: () => <Avatar src="https://randomuser.me/api/portraits/men/40.jpg" />,
    title: "Dubem Izuorah",
    hide: !user.value
  },
  {
    key: "auth",
    title: user.value ? "Logout" : "Login",
    onClick: () => user.value = !user.value
  },
]);
// Filter out hidden items
const menuItems = computed(() => items.value.filter(item => !item.hide));
</script>

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Key Takeaways:

Reactive Layout : Use computed properties to update the layout based on reactive data like user.
Conditional Rendering : Apply different values using ternary operators based on state.
JSX Integration : Utilize JSX to include HTML elements and Vue components directly within property values.
Dynamic Properties : Use properties like hide to conditionally display items.
Event Handling : Store functions or event handlers (e.g., onClick) within data objects.
Modular Data Management : Move layout data to Vue composables or external JSON files for better organization.

Defining the Avatar Component

Create an Avatar component used within the dynamic navbar.

? Avatar.vue

<template>
  <div class="rounded-full w-10 h-10 bg-gray-100 overflow-hidden">
    <img class="w-full h-full object-cover" :src="src" />
  </div>
</template>

<script setup>
const props = defineProps({
  src: {
    type: String,
    required: true,
  },
})
</script>

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This component creates a reusable avatar element that can display different images based on the ‘src’ prop passed to it. This makes it flexible and easy to use throughout your application for displaying user avatars or profile pictures.

Building the Layout

Use the defined data to render the navbar dynamically.

? App.vue

<template>
  <nav class="w-screen border-b py-4">
    <div class="container mx-auto flex items-center gap-10">
      <component
        v-for="item in menuItems"
        :key="item.key"
        :is="item.to ? NuxtLink : 'button'"
        v-bind="item"
        @click="item.onClick"
        class="flex items-center"
      >
        <img v-if="item.image" :src="item.image" class="w-10 h-10 object-contain" />
        <component v-if="item.render" :is="item.render" />
        <component v-if="item.icon" :is="item.icon" :size="24" />
        <span v-if="item.title" class="ml-2">{{ item.title }}</span>
      </component>
    </div>
  </nav>
  <main class="h-64 bg-gray-100 flex justify-center pt-10 text-xl">App Here</main>
</template>

<script setup lang="jsx">
// The script remains the same as above
</script>

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Key Takeaways:

v-bind Usage : Attach multiple properties to elements simultaneously, keeping the template clean.
Unique Keys : Use the key attribute to prevent rendering issues during dynamic updates.
Dynamic Components : Utilize Vue’s dynamic components to render different elements based on data.
Event Binding : Attach events like @click dynamically based on data properties.
Component Modularity : Break down components further and import them as needed for better scalability.

By following this approach, you create a dynamic and flexible horizontal navbar that’s easy to extend or modify. This method not only saves time and effort but also ensures your codebase remains clean and maintainable.

Enhancing Flexibility with Vue JSX

Vue JSX allows developers to write Vue components using a syntax similar to React’s JSX, offering greater flexibility and expressiveness. Unlike Vue’s typical template-based approach, JSX allows you to embed HTML-like elements directly inside JavaScript logic. This is particularly useful in dynamic layouts where you need to generate or manipulate UI elements based on dynamic data.

Instead of separating logic and markup across different sections of the component (template and script), JSX enables you to manage both in one cohesive block of code.

In our solution, JSX helps simplify how we dynamically render components like the Avatar or conditional elements such as the “Add Funds” button.

For example, instead of hardcoding these elements into a template, we can dynamically generate them using a render function in JavaScript.

This allows us to update components like the navbar with real-time data, such as user authentication status, without duplicating code or scattering logic across the template and script sections.

By using JSX, we maintain cleaner, more maintainable code, while still leveraging Vue’s reactivity and flexibility.

Next Steps

Now that we understand dynamic layouts, it’s time to put your knowledge into practice. Here are some suggested next steps:

重構現有項目：辨識並重構目前專案中動態佈局可以提高效率和可讀性的部分，特別是在具有重複 HTML 或元件邏輯的區域。
與 CMS 整合：嘗試將 CMS 或其他系統與動態佈局集成，以創建更動態且響應更快的使用者介面。
與您的團隊合作：與您的團隊分享您對動態佈局的見解。討論如何在專案中共同利用動態佈局來提高生產力並培養持續改進的文化。
探索進階用例：繼續探索動態佈局的更進階應用。掌握來自於持續的練習和探索。

採取這些步驟，您就可以熟練動態佈局了。為了獲得更流暢的動態介面建立體驗，請查看我們的使用 Vuetify 輕鬆介面的課程，Vuetify 是 Vue.js 開發人員常用的元件庫。

透過採用動態佈局，您可以簡化開發流程，增強應用程式的靈活性，並維護更乾淨、更易於維護的程式碼庫。立即開始將動態佈局整合到您的專案中，體驗對您的工作流程和應用程式品質的變革性影響。

原發表於 https://www.vuemastery.com 於 2024 年 9 月 5 日發布。

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