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JavaScript Solution: Update the Rating State

Posted by Maya O'Reilly
Maya O'Reilly
11,141 Points

In setRating = { () => this.handleSetRating(i + 1) }; Does handleRating(i + 1) using closure underneath?

Is handleRating(i + 1) using closure underneath to remember the i(th) value?

1 Answer

Brandon White
.a{fill-rule:evenodd;}techdegree seal-36
Brandon White
Full Stack JavaScript Techdegree Graduate 34,662 Points

Hi Maya O'Reilly,

I may not be understanding your question correctly (so let me know if I’m off base with the following response), but the i(th) value is determined by which iteration of the for...loop the Star component is created in.

Essentially, when the Star component is created and pushed into the array, the argument is passed into the function at that time. So i + 1 during the first loop passes 1 into the this.handleSetRating function. During the second loop i + 1 evaluates to 2 (as i is now 1), and so 2 is passed in as an argument. During the third loop i + 1 is 3, and so on and so forth. None of these functions are invoked unless it’s corresponding Star component is clicked, but closures are not needed in this situation.