it's not. `toggle` is a pointer to a function name and "toggle()" appears to be an expression which is parsed and then executed (scary).
you can on on:click={() => toggle()} in svelte which is more similar, but it isn't parsed and executed, it is a pointer to an anonymous function which is directly executed.
on:click={toggle()} in svelte would run the function immediately (probably not what you want) and return the result as the handler for the on:click
Not a pointer to a function. In JS, functions are first class objects. You might as well say toggle() is an invocation of a pointer to a function.
<div onclick="toggle"> has existed since the dawn of JavaScript in Netscape Navigator 2.0 Beta Gold. Your complaint about the syntax is in fact baked into the foundations of the web.
you can on on:click={() => toggle()} in svelte which is more similar, but it isn't parsed and executed, it is a pointer to an anonymous function which is directly executed.
on:click={toggle()} in svelte would run the function immediately (probably not what you want) and return the result as the handler for the on:click
so quite different, really.