The easiest way to create a multiline string in JavaScript are backticks.

const s = `I'm
a
multiline
string`;

console.log(s);

The console output shows every word in the string s on a new line. Exactly as we wanted.

I'm
a
multiline
string

Alternatively, you can write everything in a single line adding \n characters.

\n stands for new line. It’s a special character that you would see only as a line break.

const s = `I'm\na\nmultiline\nstring`;

console.log(s);

The output remains the same, with every word in the string s being logged to the console from a new line.

I'm
a
multiline
string