// When you get a predefined value based on some variable,
T T e S e S e R e[ SRR G i Bl
const size = 'sm'
// You can write this logic as a bunch of "ifs",
// but then you have to:
let dimension // initialize an empty variable
i (Gl == g’ )] 4 // write a comparison logic
dimension = '10x10" // ...and an assignment logic
} else if (size === 'md') { // ...and repeat a comparison
dimension = '60x25"' // ...and assignment
} else if (size === '19') { // ...and comparison
dimension = '120x80' // ...and assignment
)
// You can also use switch statement. Then you still have to:
let dimension // initialize an empty variable
BASd N EA S I
CalS el S:
dimension = '10x10' // repeat an assignment logic
ER el 8
dimension = '60x25' // ...and repeat an assignment
G Yllete
dimension = '120x80" // ...and repeat an assignment
)
// Instead you can use Map, in that case you only:
const sizes = new Map([ // B define the mapping
['sm', '10x10'],
IR R0 R I
['lg', '120x80']
1)
const dimension = sizes.get(size) // B assign the value