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This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The uneval() function creates a string representation of the source code of an Object.




A JavaScript expression or statement.

Return value

A string representing the source code of the given Object.

Note: You won't get a valid JSON representation of your Object.


uneval() is a top-level function and is not associated with any object.


var a = 1;
uneval(a); // returns a String containing 1

var b = '1';
uneval(b); // returns a String containing "1"

uneval(function foo() {}); // returns "(function foo(){})"

var a = uneval(function foo() { return 'hi'; });
var foo = eval(a);
foo(); // returns "hi"


Not part of any specifications.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No No Yes No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support No No No Yes No No No

See also

Štítky a přispěvatelé do dokumentace

 Poslední aktualizace od: SphinxKnight,