javascript - Can't store a boolean returned by a function in a variable -

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• boolean variable returns string javascript function 2 answers

i don't know if bug, feels kind of strange. can store boolean returned function in variable using javascript? whenever try store boolean value in variable returned function, gets changed string.

i have following function converts string boolean

function str2bool(strvalue){   console.log("value - " + strvalue);   console.log("type - " + typeof strvalue);   return (strvalue && typeof strvalue == 'string') ? (strvalue.tolowercase() == 'true') : (strvalue == true); } 

i've found function somewhere here on stackoverflow, not remember it's author, if reading this, sorry me not giving proper credits:)

i have javascript line, looks follows:

target.prop('disabled',str2bool(booleaninstringformat)); console.log("typeof str2bool return - " + typeof str2bool(booleaninstringformat)); 

if use way, everyting works fine, str2bool function returns following lines console:

value - false
type - string

and line after main function returns:

typeof of str2bool function - boolean

but if try store return value of str2bool in variable, , use afterwards, prop function won't work, because apparently variable use store return value of str2bool becomes string. if run code following results:

status = str2bool(booleaninstringformat); console.log("typeof status - " + typeof status); target.prop('disabled',status); 

the results following:

value - false
type - string
typeof status - string
end result target remains disabled

so, why typeof variable in store return of function changed string?

because use global variable status, appeared property of global object window, property string.

the window.status.

you change other variable name, better, avoid using global variable.

(function(){   var status = str2bool('false');   console.log(typeof status); }());