Can I add forEach method to String prototype from Array prototype?

As we know there is a .forEach() method for arrays in JavaScript. But Strings don’t have that method built in.

So, is there any issue regarding the following code snippet:
String.prototype.forEach = Array.prototype.forEach ?

This setting helps me to use .forEach for Strings.

let myName = "Avetik";   

String.prototype.forEach = Array.prototype.forEach;

myName.forEach(char => {

console.log(char);
})

The above code works fine and outputs all chars of my name.

You already guessed that I am a newbie in JS.

>Solution :

You can, but:

• it’s confusing (other developers working on the same codebase could well be very confused at seing such a method called on a string)
• can lead to fragile code (if you define String.prototype.forEach, it may interfere with other code that uses methods on the String prototype)
• doesn’t help much: you can do [...str].forEach very easily, and you can also do for (const char of str) { very easily

// Say we want to iterate over this string:
const str = 'str';

// without adding a method to the prototype. Easy:

// One method:
for (const char of str) {
  console.log(char);
}

// Another method:
[...str].forEach((char) => {
  console.log(char);
});

• can damage the future syntax of the language if enough script-writers define such a thing (see what happened with Array.prototype.contains and Array.prototype.flatten)

So, it’s doable, but it’s probably not a good idea.