Save string as code in javascript

Question

I have a string in Javascript. What I need is to save it as code:

var string = "this.count++";
var func1 = {};
func1['f'] = string; // should be saved as executable code..

How can I do? I don't need eval(), cause I don't need to evaluate in this moment.

`var string = () => this.count++;var func1 = {}; func1['f'] = string();` — Pranav C Balan, Jun 24 '16 at 10:45
Are you asking how to create a function for later execution based on code in a string? What is the context of "this" ? — Alex K., Jun 24 '16 at 10:45
@AlexK. actually this have no context.. I need to save it in an object.. in that object this have a context — granmirupa, Jun 24 '16 at 10:46
**Why** do you think you need to do this? Because you almost certainly don't. — T.J. Crowder, Jun 24 '16 at 10:47
@PranavCBalan wich language is that? I tried it give me error!! — granmirupa, Jun 24 '16 at 10:48
granmirupa - If @Pranav's answer worked for you, that's fundamentally different from what you actually asked and not at all what gurvinder372's answer says. gurvinder's answer is the answer to *what you asked*, though. — T.J. Crowder, Jun 24 '16 at 11:03
@T.J.Crowder it works in sense it doesn't give error.. but is not the answer to my question — granmirupa, Jun 24 '16 at 11:35

score 3 · Accepted Answer · edited Jun 24 '16 at 10:53

try

new Function(string)

for example

var string = "this.count++; console.log(1)";
new Function(string)();

Note: Using Function constructor (as with eval) you will be able to execute any arbitrary code which could be a security risk if it contains user-derived text. Not so much an issue if it's definitely the current user who entered it (they have other ways of running code on the page), but if you're running text from User A as code on User B's browser, that's a massive no-no.

score 1 · Answer 2 · edited May 23 '17 at 12:08

1

You could create new Function() object. Keep in mind that you should avoid this as much as possible, because new Function() and eval() are dangerous!

func1['f'] = new Function(string).

You can read about this more here.

edited May 23 '17 at 12:08

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answered Jun 24 '16 at 10:46

Patryk Perduta

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Save string as code in javascript

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