Smooth Element Transitions with Vue CSS Transitions

This challenge focuses on implementing CSS transitions in a Vue.js application to create visually appealing animations for elements appearing and disappearing. This is a fundamental technique for enhancing user experience by providing visual feedback and making interfaces feel more dynamic and responsive.

Problem Description

Your task is to create a Vue component that toggles the visibility of a specific element (e.g., a message box, an image, or a list item). This toggling should be accompanied by a smooth CSS transition, rather than an abrupt appearance or disappearance.

Key Requirements:

Vue Component: Create a single-file Vue component (.vue file) using TypeScript.
Toggle Button: Include a button that, when clicked, toggles the visibility of a designated content element.
CSS Transition: Implement a CSS transition for the content element. The transition should animate changes in its opacity and height (or transform for a scaling effect, though height is a good starting point).
Vue's Transition Component: Utilize Vue's built-in <transition> component to manage the entry and exit animations.
TypeScript: All Vue component logic (script section) must be written in TypeScript.

Expected Behavior:

When the component loads, the content element should be initially hidden.
Clicking the "Show/Hide" button should trigger the appearance/disappearance of the content element.
The appearance should be animated from invisible and zero height to visible and its natural height.
The disappearance should be animated from visible and its natural height to invisible and zero height.
The animation should be smooth and visually pleasing, taking a noticeable but not overly long duration.

Edge Cases to Consider:

Initial State: Ensure the transition works correctly when the component is first rendered and the element is hidden.
Rapid Toggling: The transitions should handle rapid clicks of the toggle button gracefully without visual glitches.

Examples

Example 1: Basic Fade and Slide

Assume we have a simple div that we want to toggle.

Input: (Conceptual - based on user interaction)

Component mounts. Content is hidden.
User clicks the "Toggle Content" button.

Output: The content div fades in from opacity: 0 to opacity: 1 and smoothly expands its height from 0px to its natural height over, say, 0.3 seconds.

Input: (Conceptual)

Content div is visible.
User clicks the "Toggle Content" button again.

Output: The content div fades out from opacity: 1 to opacity: 0 and smoothly collapses its height from its natural height to 0px over, say, 0.3 seconds.

Example 2: Different Transition Properties

Consider toggling an image.

Input: (Conceptual)

Component mounts. Image is hidden.
User clicks the "Toggle Image" button.

Output: The image scales in from scale(0.5) and opacity: 0 to scale(1) and opacity: 1 over 0.5 seconds.

Input: (Conceptual)

Image is visible.
User clicks the "Toggle Image" button again.

Output: The image scales out from scale(1) and opacity: 1 to scale(0.5) and opacity: 0 over 0.5 seconds.

Constraints

Vue Version: Vue 3.
TypeScript: The <script setup lang="ts"> syntax is preferred.
CSS: Transitions should be implemented using standard CSS transition properties.
Animation Duration: Aim for transition durations between 0.2s and 1s.
No External Libraries: Do not use any external animation libraries (e.g., Animate.css, GSAP).

Notes

Vue's <transition> component automatically applies specific CSS classes during the entry and exit phases of an element. Familiarize yourself with these classes: v-enter-from, v-enter-active, v-enter-to, v-leave-from, v-leave-active, v-leave-to.
For animating height, you might need to set overflow: hidden; on the element being transitioned.
Consider using display: none; only when the element is completely gone after the transition, or rely on opacity and height to control visibility and layout.
Think about the transition-timing-function for a more natural feel (e.g., ease-in-out).
The goal is to have a functional Vue component that demonstrates a smooth CSS transition upon conditional rendering.

Smooth Element Transitions with Vue CSS Transitions

Problem Description

Key Requirements:

Vue Component: Create a single-file Vue component (.vue file) using TypeScript.
Toggle Button: Include a button that, when clicked, toggles the visibility of a designated content element.
CSS Transition: Implement a CSS transition for the content element. The transition should animate changes in its opacity and height (or transform for a scaling effect, though height is a good starting point).
Vue's Transition Component: Utilize Vue's built-in <transition> component to manage the entry and exit animations.
TypeScript: All Vue component logic (script section) must be written in TypeScript.

Expected Behavior:

When the component loads, the content element should be initially hidden.
Clicking the "Show/Hide" button should trigger the appearance/disappearance of the content element.
The appearance should be animated from invisible and zero height to visible and its natural height.
The disappearance should be animated from visible and its natural height to invisible and zero height.
The animation should be smooth and visually pleasing, taking a noticeable but not overly long duration.

Edge Cases to Consider:

Initial State: Ensure the transition works correctly when the component is first rendered and the element is hidden.
Rapid Toggling: The transitions should handle rapid clicks of the toggle button gracefully without visual glitches.

Examples

Example 1: Basic Fade and Slide

Assume we have a simple div that we want to toggle.

Input: (Conceptual - based on user interaction)

Component mounts. Content is hidden.
User clicks the "Toggle Content" button.

Output: The content div fades in from opacity: 0 to opacity: 1 and smoothly expands its height from 0px to its natural height over, say, 0.3 seconds.

Input: (Conceptual)

Content div is visible.
User clicks the "Toggle Content" button again.

Output: The content div fades out from opacity: 1 to opacity: 0 and smoothly collapses its height from its natural height to 0px over, say, 0.3 seconds.

Example 2: Different Transition Properties

Consider toggling an image.

Input: (Conceptual)

Component mounts. Image is hidden.
User clicks the "Toggle Image" button.

Output: The image scales in from scale(0.5) and opacity: 0 to scale(1) and opacity: 1 over 0.5 seconds.

Input: (Conceptual)

Image is visible.
User clicks the "Toggle Image" button again.

Output: The image scales out from scale(1) and opacity: 1 to scale(0.5) and opacity: 0 over 0.5 seconds.

Constraints

Vue Version: Vue 3.
TypeScript: The <script setup lang="ts"> syntax is preferred.
CSS: Transitions should be implemented using standard CSS transition properties.
Animation Duration: Aim for transition durations between 0.2s and 1s.
No External Libraries: Do not use any external animation libraries (e.g., Animate.css, GSAP).

Notes

Vue's <transition> component automatically applies specific CSS classes during the entry and exit phases of an element. Familiarize yourself with these classes: v-enter-from, v-enter-active, v-enter-to, v-leave-from, v-leave-active, v-leave-to.
For animating height, you might need to set overflow: hidden; on the element being transitioned.
Consider using display: none; only when the element is completely gone after the transition, or rely on opacity and height to control visibility and layout.
Think about the transition-timing-function for a more natural feel (e.g., ease-in-out).
The goal is to have a functional Vue component that demonstrates a smooth CSS transition upon conditional rendering.