JS: String Escape Sequence

What is 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
 */

List of Escape Sequences

\"

QUOTATION MARK

\'

APOSTROPHE

\\

REVERSE SOLIDUS

\b

BACKSPACE [see ASCII Characters]

\f

FORM FEED

\n

LINE FEED

\r

CARRIAGE RETURN

\t

CHARACTER TABULATION

\u…

Unicode Escape Sequence

\v

LINE TABULATION

Backslash

Backslash in front of other character quote the char literally:

"\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" === "	");