Svelte

Svelte's unique "runes" system makes it simple to reactively change a component's state.

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React

React's odd styling syntax makes it difficult to mix with other frameworks, so this component was styled entirely inline.

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Preact

Preact's stripped-down approach was perfect for such a small component. React compatability wasn't necessary, so this compenent was incredibly lightweight.

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Solid-js

Solid's conditional reactivity allowed for intricate fine-tuning. For example, the number of clicks displayed to you cannot be accessed by the function that decides whether to render "time" or "times". To do that, said function interacts with the result of the variable's name as a function, or "count()". This level of customization wasn't necessary for a simple counter, but its implementation neatly illustrates Solid's advantages.

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Vue

Vue's intuitive syntax was very easy to work with. Variables and functions can slot into HTML elements seamlessly.

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Take a look at the source code if you want to know how these work in detail!