Angular Host Binding Challenge: Custom Attribute Control

Angular's host bindings allow you to directly manipulate the attributes of the host element of a component. This challenge focuses on creating a reusable component that controls the title attribute of its host element based on an input property. This is a common pattern for adding dynamic tooltips or titles to elements, enhancing user experience and accessibility.

Problem Description

You need to create an Angular component called TitleDirectiveComponent that takes an input property called dynamicTitle and sets the title attribute of its host element to the value of dynamicTitle. The component should be reusable and allow developers to easily add dynamic titles to any element. The component itself should not render any visible content; it solely manages the title attribute.

Key Requirements:

• Create a new Angular component named TitleDirectiveComponent.
• Define an @Input() property named dynamicTitle of type string.
• Use the @HostBinding() decorator to bind the title attribute of the host element to the dynamicTitle input property.
• The component should not render any HTML. It's purely a logic component.

Expected Behavior:

When the dynamicTitle input property is changed, the title attribute of the host element should be updated accordingly. If dynamicTitle is null or undefined, the title attribute should be cleared.

Edge Cases to Consider:

• What should happen if dynamicTitle is an empty string? The title attribute should be set to an empty string.
• What should happen if dynamicTitle is null or undefined? The title attribute should be removed from the host element.
• The component should work correctly with any valid HTML element as its host element.

Examples

Example 1:

Input: dynamicTitle = "Hover over me for a tooltip!"
Output: <div title="Hover over me for a tooltip!">...</div>
Explanation: The component sets the title attribute of the host div to the provided string.

Example 2:

Input: dynamicTitle = ""
Output: <span title="">...</span>
Explanation: The component sets the title attribute of the host span to an empty string.

Example 3:

Input: dynamicTitle = null
Output: <a>...</a> (no title attribute)
Explanation: The component removes the title attribute from the host anchor tag.

Constraints

• The component must be written in TypeScript.
• The solution must use Angular's @HostBinding() decorator.
• The component should be as concise and efficient as possible.
• The component should not render any visible HTML.
• The component should be compatible with Angular versions 8 and above.

Notes

• Think about how Angular's change detection works and how it affects the host binding.
• Consider using a simple template with no content to ensure the component's functionality is focused solely on the host binding.
• This challenge tests your understanding of Angular's decorators and how to manipulate the host element of a component. Focus on the @HostBinding() decorator and its purpose.