React array.map() loop components

Yes, I’m stuck again.
but I can feel it, if I got it this concept, I will be kind of understand this algorithsm.

in React,

array.map(item => 
<Components item={item}/>
)
//but, If i want to onClick event one components.
// it's effective all mapping components. 

so, 3 way of solutions,

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one, make another router, (new page and sending props.)

two. map has index argments.
so I can make each item has index, if index is correct, retune correct index.
map(function(element, index) { /* ... */ })

three. I couldn;t get is… still, change array way.

-> I can’t understand this one. tomorrow I think I need to clone coding and figured it out.