# Chapter 8 counter code not working **URL:** \ **Category:** web dev\ **Created:** [October 5, 2020, 10:33pm UTC](https://forum.kirupa.com/t/chapter-8-counter-code-not-working/644449 "2020-10-05T22:33:20Z")\ **Posts on this page:** 2\ **Page:** 1

**Author:** ![Yogendra\_Khopkar](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/yogendra_khopkar/32/12585_2.png) [@Yogendra\_Khopkar](https://forum.kirupa.com/u/Yogendra_Khopkar)\ **Post date:** [October 5, 2020, 10:33pm UTC](https://forum.kirupa.com/t/chapter-8-counter-code-not-working/644449/1 "2020-10-05T22:33:20Z")

I am unable to get the code to display counter. I tried out the code and am getting error that “cannot read property strikes of undefined” below is the source code React!React!React! #container{ padding:50px; background-color:#FFF; } ```

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**Author:** ![senocular](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/senocular/32/7217_2.png) [@senocular](https://forum.kirupa.com/u/senocular)\ **Post date:** [October 5, 2020, 10:37pm UTC](https://forum.kirupa.com/t/chapter-8-counter-code-not-working/644449/2 "2020-10-05T22:37:41Z")

You’re losing context in your setTimeout. You can fix this by wrapping it in an arrow function ```auto setInterval(() => this.timerTick,1000); ``` This ensures timerTick is called off of `this` and not called as a standalone function reference where `this` becomes undefined (or `window` if not in strict mode).