JavaScript React Basics Understanding State Understanding State Review

Charlie Prator
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Charlie Prator
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What does the exclamation point in this code stating?

confirmGuest = () => {
  this.setState( prevState => ({ 
    isConfirmed: !_________.isConfirmed
  }));
}

Is the above saying to update the state of isConfirmed through the negation of its previous state? So, if the previous state of isConfirmed is false, then we're changing it to true with the exclamation point, right?

1 Answer

yes!... just toggling the value of isConfirmed

isConfirmed: !prevState.isConfirmed