JavaScript: String Escape Sequence

Escape sequence are sequence of characters starting with backslash, inside a string, to represent certain unprintable characters such as \n for Line Feed to represent newline, or to represent Unicode characters.

console.log("a\nb");
/*
prints a and b each on its own line
the \n is a escape sequence. It means newline
 */

Backslash in front of other character quote the char literally:

console.log("\l\ov\e" === "love");

Backslash in front of literal newline means continue the line:

console.log(
"a\
b\
c" === "abc",
);

Some of the escape sequence character can be in string literal directly without escaping.

// \t (tab character) can be in string literally
console.log("\t" === "	");