[SOLVED] Is there a way to create a function from a string with javascript?


For example;

var s = "function test(){

var fnc = aMethod(s);

If this is the string, I want a function that’s called fnc. And fnc(); pops alert screen.

eval("alert(1);") doesnt solve my problem.


I added a jsperf test for 4 different ways to create a function from string :

  • Using RegExp with Function class

    var func = "function (a, b) { return a + b; }".parseFunction();

  • Using Function class with “return”

    var func = new Function("return " + "function (a, b) { return a + b; }")();

  • Using official Function constructor

    var func = new Function("a", "b", "return a + b;");

  • Using Eval

    eval("var func = function (a, b) { return a + b; };");


2 result samples:
enter image description here
enter image description here

Answered By – phnah

Answer Checked By – Pedro (BugsFixing Volunteer)

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