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Brian Hoang11,515 Points
setState in handleStopwatch()
The fact that in the video "!this.state.isRunning" is evaluated to "true" and console logs "starting..." the first time Guil clicks the start button implies that the isRunning state was not changed by setState before the "if(!this.state.isRunning)" line
Should I from now on assume the effect of setState method is not immediate, at least in the function it was called?
Zaberca David2,964 Points
This is the same thing I was wondering about. At 4:33, the instructor says 'only when starting the timer'. In concept, when the timer starts, the isRunning flag goes from false, to true. The if statement condition here is (!this.state.isRunning), which goes true when isRunning is set to false. That means the previous setState method did not change the state.
Can somebody confirm this and maybe explain further or give some references? Thank you