How to useeval() Method in Javascript

Approach 1: Using Function() Constructor

Use the eval() method to create a function from the string.
It accepts the function in the form of a string and converts it to a JavaScript function.
In this example, It takes 2 arguments and returns the sum of both numbers.

Example 2: This example uses the approach discussed above.

Javascript

const str = "var func = function (a, b) { return a + b; };";
 
// Till this point we can use 'func' as function
function funFromString() {
 
    // Converting the string to function
    eval(str);
     
    console.log(func(2, 5));
}
 
funFromString();