How to execute JS statement from a string?

Question

I wanna basically execute a statement stored in a var. For example, I have this,

var statement = "alert('Hi!')";

How can I make JS execute the statement stored inside the var statement? Thanks a lot guys.

http://stackoverflow.com/questions/939326/execute-javascript-code-stored-as-a-string — roNn23, Jan 19 '15 at 16:28
see which one is better eval() or new Function, http://www.2ality.com/2014/01/eval.html — A l w a y s S u n n y, Jan 19 '15 at 16:33

score 1 · Accepted Answer · answered Jan 19 '15 at 16:27

1

This will do it, but it's not recommended

var statement = "alert('Hi!')";
eval(statement)

answered Jan 19 '15 at 16:27

roryok

score 1 · Answer 2 · answered Jan 19 '15 at 16:28

1

You could use Function constructor

var func = new Function("alert('Hi!')")
func(); // call it

You could eval but this method is comparatively safer.

answered Jan 19 '15 at 16:28

Amit Joki

score 1 · Answer 3 · answered Jan 19 '15 at 16:28

1

You're probably looking for eval
var test = "alert('toto')";
eval(test);

answered Jan 19 '15 at 16:28

Flo

score 1 · Answer 4 · answered Jan 19 '15 at 16:28

1

you can use eval("my script").

answered Jan 19 '15 at 16:28

Sreelal P Mohan

score 1 · Answer 5 · answered Jan 19 '15 at 16:29

1

You should be able to use eval() like this:

var statement = 'alert('Hi!');";
eval(statement);

eval is a dangerous thing though and should be used with caution.

answered Jan 19 '15 at 16:29

zack.lore

5 Answers5