Smoothly Transitioning Elements in Vue with TypeScript

This challenge focuses on implementing a smooth transition effect when an element is added or removed from the DOM in a Vue.js application using TypeScript. Transitions are crucial for creating a polished and engaging user experience, and understanding how to implement them effectively is a fundamental skill for Vue developers. You'll be building a component that dynamically shows and hides an element, applying a CSS transition to create a visually appealing effect.

Problem Description

You are tasked with creating a Vue component called TransitionableElement that displays a given element and provides a smooth transition when the element is toggled between being visible and hidden. The component should accept a visible prop (boolean) which controls the element's visibility. When visible changes, the element should fade in or out using a CSS transition.

Key Requirements:

• visible Prop: The component must accept a visible prop of type boolean.
• Conditional Rendering: The component should conditionally render the element based on the visible prop.
• CSS Transition: A CSS transition should be applied to the element to create a fade-in/fade-out effect. The transition should have a duration of 300ms and an easing function of ease-in-out.
• TypeScript: The component must be written in TypeScript, with proper type annotations.
• Dynamic Transition: The transition should trigger automatically when the visible prop changes.

Expected Behavior:

• When visible is true, the element should be displayed.
• When visible changes to false, the element should smoothly fade out over 300ms.
• When visible changes back to true, the element should smoothly fade in over 300ms.
• The transition should be visually appealing and consistent.

Edge Cases to Consider:

• Initial value of visible prop. The component should handle both true and false initial values correctly.
• Rapid toggling of the visible prop. The transition should still function smoothly even with frequent changes.

Examples

Example 1:

Input: visible = true, element content = "Hello"
Output: The element "Hello" is displayed.
Explanation: The component renders the element, and no transition is initially applied.

Example 2:

Input: visible = true, then visible = false
Output: The element smoothly fades out over 300ms.
Explanation: The component detects the change in `visible` and applies the fade-out transition.

Example 3:

Input: visible = false, then visible = true
Output: The element smoothly fades in over 300ms.
Explanation: The component detects the change in `visible` and applies the fade-in transition.

Constraints

• Transition Duration: The transition duration must be exactly 300ms.
• Easing Function: The transition easing function must be ease-in-out.
• CSS Only: The transition must be implemented using CSS transitions, not JavaScript animations.
• Component Structure: The component should be a single, self-contained Vue component.
• TypeScript: Strict type checking is expected.

Notes

• You can use Vue's v-show directive for conditional rendering.
• Consider using a CSS class to apply the transition styles.
• Think about how to ensure the transition is applied correctly regardless of the initial value of the visible prop.
• Focus on creating a clean and maintainable component. Good use of CSS classes and clear TypeScript types will be beneficial.