JavaScript Object Literal Evaluation and valueOf -


how following code segment evaluates 0.25 ? don't understand how object literals working.

({valueof: function() { return 1}} / 4)

all others below evaluate nan:

({prop1: function() { return 1}} / 4)  ({valueof: 1} / 4)  ({valueof: "1"} / 4)

also there special have property named 'valueof' ?

type coercion.

if call 

21 + "21" // "2121"

javascript implicitly coercing number string calling tostring() on it.

similarly, in example, javascript implicitly coercing object number calling valueof().


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