var foo = "function (){ alert('meee'); }";
foo();
I have tried the above but it does not work is there any other way to execute that function without using eval?
thnx
you want to use the Function
constructor directly, as Anders said. All arguments are strings. The last argument is the body of the function, any leading arguments are the names of the arguments the function takes.
To borrow from Anders' example,
var multiply = new Function("x", "y", "return x * y");
would be like writing
var multiply = function (x,y) {
return x * y
}
In your case, you have "function (){ alert('meee'); }"
and you want to save it as a function to var foo
.
var fn = "function (){ alert('meee'); }";
var foo = new Function("return ("+fn+")")();
foo();
// alerts "meee"
The difference between Function
and eval
is eval
runs in the private scope, while Function
runs in the global scope.
var x="haha", y="hehe";
function test () {
var x=15, y=34;
eval("alert('eval: ' + x + ', ' + y)");
new Function("alert('Func: ' + x + ', ' + y)")();
}
test();
// eval: 15, 34
// Func: haha, hehe
Don't try to run it in the console, you'll get a deceiving result (consoles use eval
). Writing it in a <script>
tag and loading it in the browser will give the true result.
According to MDC. Use:
var multiply = new Function("x", "y", "return x * y");
var theAnswer = multiply(7, 6);
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