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JavaScript Building Applications with React and Redux Putting it all Together Updating the Player, Counter and AddPlayerForm Components

Posted by shubhamvinay
shubhamvinay
3,741 Points

At 2.06 why did we update to onClick={() => props.removePlayer(props.index)}?

At 2.06 why did we update to onClick={() => props.removePlayer(props.index)}? and not just onClick={props.removePlayer(props.index)}

1 Answer

Adam Fields
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Adam Fields
Full Stack JavaScript Techdegree Graduate 37,838 Points
Adam Fields
.a{fill-rule:evenodd;}techdegree seal-36
Adam Fields
Full Stack JavaScript Techdegree Graduate 37,838 Points

You have to use an anonymous arrow function to pass an argument to the click handler function, otherwise, you'd actually be calling the function when the code was executed.

props.removePlayer(props.index) is actually a function call.

() => props.removePlayer(props.index) is an anonymous function that returns a function.

So the rule of thumb, whenever you need to pass an argument to your handler, wrap it in an arrow function.