Why do I need to pass an anonymous function into the onClick event?

Question

I\'ve been trying to learn the basics of React. However, I\'ve come across a section in the tutorial that asks me to place an alert() inside of an onClick event

Answer 1

Because if you call a function, then the function runs. (And you get the return value from it)

const onClick = alert("hello");
console.log(onClick);

If you define a function (X) that calls a function (Y), then it doesn't call Y until you call X.

const onClick = () => alert("hello");
console.log(onClick);