CasperSecurity
.Dd May 13, 2016
.Dt jsesc 1
.Sh NAME
.Nm jsesc
.Nd escape strings for use in JavaScript string literals
.Sh SYNOPSIS
.Nm
.Op Fl s | -single-quotes Ar string
.br
.Op Fl d | -double-quotes Ar string
.br
.Op Fl w | -wrap Ar string
.br
.Op Fl e | -escape-everything Ar string
.br
.Op Fl 6 | -es6 Ar string
.br
.Op Fl l | -lowercase-hex Ar string
.br
.Op Fl j | -json Ar string
.br
.Op Fl p | -object Ar string
.br
.Op Fl p | -pretty Ar string
.br
.Op Fl v | -version
.br
.Op Fl h | -help
.Sh DESCRIPTION
.Nm
escapes strings for use in JavaScript string literals while generating the shortest possible valid ASCII-only output.
.Sh OPTIONS
.Bl -ohang -offset
.It Sy "-s, --single-quotes"
Escape any occurrences of ' in the input string as \\', so that the output can be used in a JavaScript string literal wrapped in single quotes.
.It Sy "-d, --double-quotes"
Escape any occurrences of " in the input string as \\", so that the output can be used in a JavaScript string literal wrapped in double quotes.
.It Sy "-w, --wrap"
Make sure the output is a valid JavaScript string literal wrapped in quotes. The type of quotes can be specified using the
.Ar -s | --single-quotes
or
.Ar -d | --double-quotes
settings.
.It Sy "-6, --es6"
Escape any astral Unicode symbols using ECMAScript 6 Unicode code point escape sequences.
.It Sy "-e, --escape-everything"
Escape all the symbols in the output, even printable ASCII symbols.
.It Sy "-j, --json"
Make sure the output is valid JSON. Hexadecimal character escape sequences and the \\v or \\0 escape sequences will not be used. Setting this flag enables the
.Ar -d | --double-quotes
and
.Ar -w | --wrap
settings.
.It Sy "-o, --object"
Treat the input as a JavaScript object rather than a string. Accepted values are flat arrays containing only string values, and flat objects containing only string values.
.It Sy "-p, --pretty"
Pretty-print the output for objects, using whitespace to make it more readable. Setting this flag enables the
.It Sy "-l, --lowercase-hex"
Use lowercase for alphabetical hexadecimal digits in escape sequences.
.Ar -o | --object
setting.
.It Sy "-v, --version"
Print jsesc's version.
.It Sy "-h, --help"
Show the help screen.
.El
.Sh EXIT STATUS
The
.Nm jsesc
utility exits with one of the following values:
.Pp
.Bl -tag -width flag -compact
.It Li 0
.Nm
successfully escaped the given string and printed the result.
.It Li 1
.Nm
wasn't instructed to escape anything (for example, the
.Ar --help
flag was set); or, an error occurred.
.El
.Sh EXAMPLES
.Bl -ohang -offset
.It Sy "jsesc 'foo bar baz'"
Print an escaped version of the given string.
.It Sy echo\ 'foo bar baz'\ |\ jsesc
Print an escaped version of the string that gets piped in.
.El
.Sh BUGS
jsesc's bug tracker is located at <https://github.com/mathiasbynens/jsesc/issues>.
.Sh AUTHOR
Mathias Bynens <https://mathiasbynens.be/>
.Sh WWW
<https://mths.be/jsesc>