What is the difference between uneval and eval

in Javascript?

Difference between uneval and eval in Javascript

The uneval and eval functions are both used to evaluate strings of JavaScript code. However, they differ in how they evaluate the code.

uneval

The uneval function is used to create a string representation of a given value. It takes a single argument, which can be any type of value, and returns a string representation of that value.

For example, if you pass a number to uneval, it will return a string representation of that number:

let num = 5;
let str = uneval(num);
console.log(str); // "5"

eval

The eval function is used to execute a string of JavaScript code. It takes a single argument, which must be a string of valid JavaScript code, and executes the code.

For example, if you pass a string of JavaScript code to eval, it will execute the code:

let str = 'console.log("Hello World!");';
eval(str); // prints "Hello World!"

Summary

The uneval and eval functions are both used to evaluate strings of JavaScript code. However, they differ in how they evaluate the code. uneval is used to create a string representation of a given value, while eval is used to execute a string of JavaScript code.