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![Suan Choi](https://secure.gravatar.com/avatar/7b022bd0a7d595d4a3fc8a68de23da87?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Suan Choi
Front End Web Development Techdegree Graduate 16,587 PointsIs it necessary to use anonymous arrow functions in onClick method for incrementScore/decrementScore?
It seems like it's working fine without arrow function, just like
<div className="counter">
<button className="counter-action decrement" onClick={decrementScore}> - </button>
<span className="counter-score">{score}</span>
<button className="counter-action increment" onClick={incrementScore}> + </button>
</div>
2 Answers
![Steven Parker](https://uploads.teamtreehouse.com/production/profile-photos/969492/micro_tool_chess_set_2.jpg)
Steven Parker
230,688 PointsThe value assigned to the "onClick" property is a callback function. β
![Suan Choi](https://secure.gravatar.com/avatar/7b022bd0a7d595d4a3fc8a68de23da87?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Suan Choi
Front End Web Development Techdegree Graduate 16,587 PointsOh, sorry I meant anonymous callback function as in the video!
Steven Parker
230,688 PointsSteven Parker
230,688 PointsFunctionally, it makes no difference if the callback function is a named function or an anonymous one. It's your choice.
Suan Choi
Front End Web Development Techdegree Graduate 16,587 PointsSuan Choi
Front End Web Development Techdegree Graduate 16,587 PointsSo in the video, she called the increment/decrement function inside anonymous arrow function and passed it to the onClick handler, rather than passing the increment/decrement functions by itself, as I wrote above. From my understanding sheβs passing a function to call another function. Is that necessary?
Steven Parker
230,688 PointsSteven Parker
230,688 PointsIt's probably not necessary unless there's a reason to create a specific scope for the actual handler. I'm not familiar with this particular lesson, so it might also be a convention established in previous examples.
Suan Choi
Front End Web Development Techdegree Graduate 16,587 PointsSuan Choi
Front End Web Development Techdegree Graduate 16,587 PointsI see, thanks for your answer π