Why is the timer not working?

JavaScript
1

I am writing a final test on Front End Development Libraries and the interval function does not work for me. can anyone suggest what is wrong?

2

Log out this.state.isCounting and this.state.timeleft inside the interval method.

  1. Is a timing issue. You can use the setState callback to invoke interval although it probably isn’t the correct, or best way of dealing with it.
this.setState(
  (state) => ({ isCounting: !state.isCounting }),
  () => {
    this.interval();
  }
);
  1. Is a typo (camelCase variable).
3

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