I am trying to replace eval/new Function with corresponding anonymous function.
Existing Code -
var y = 2
var fn = new Function("return" +y)
console.log(fn)
When i print fn output is
ƒ anonymous(
) {
return2
}
Refactored code which i am writing -
var y = 2
var fn1 = function() {return y}
console.log(fn1)
But fn1 in this case is
ƒ () {return y}
Any pointers how can i get the same output as fn ƒ anonymous() {return2} using my own anonymous function.
You can't (at least not without using another version of eval).
You can get the same effect (i.e. not having a mutable y) by using a closure.
var y = 2
var fn1 = function(closure_y) {
return function() {
return closure_y;
}
}(y)
y = 3;
console.log(fn1())If your code depends on a function stringifying itself in a particular way, then you should probably rewrite the code so it no longer depends on that.