Js add new line to string

In JavaScript, you can add a new line to a string using various methods. Here are a few:

Using the \n character:
```
const str = "Hello\nWorld";
console.log(str); // Output: "Hello
World"
```
The \n character is an escape sequence that represents a new line.
Using the + operator:
```
const str = "Hello" + "\n" + "World";
console.log(str); // Output: "Hello
World"
```
You can concatenate strings using the + operator and add a new line character (\n) in between.
Using the String.prototype.concat() method:
```
const str = "Hello".concat("\n", "World");
console.log(str); // Output: "Hello
World"
```
The concat() method allows you to concatenate strings and add a new line character (\n) in between.
Using template literals:
```
const str = `Hello
World`;
console.log(str); // Output: "Hello
World"
```
Template literals (introduced in ECMAScript 2015) allow you to embed new lines directly in your string using the backtick character (`).
Using the String.prototype.replace() method:
```
const str = "Hello";
str = str.replace(/\n/g, "<br>");
console.log(str); // Output: "Hello<br>World"
```
The replace() method allows you to replace a pattern (in this case, a new line character) with a new string.

These are just a few ways to add a new line to a string in JavaScript. Choose the method that best fits your use case!