nano-linefolding/syntax/javascript.nanorc
Benno Schulenberg 485eb18d83 syntaxes: use one regex for coloring quoted strings, to avoid overlap
Quoted strings cannot start within another quoted string and end after
that other string has ended.  Therefore single-quoted and double-quoted
strings should (as much as possible) be colorized by a single rule, so
that overlapping colorations are avoided.

(This also fixes a double typo in the PHP syntax (\. --> \\.) that has
been there since the PHP syntax was added in 2008, commit 90ee8ee4.)

This fixes https://savannah.gnu.org/bugs/?61387.

Bug existed since each of these syntaxes was introduced,
the oldest ones around 2006, a few others around 2015.

The one that got it right was the Lua syntax from 2011.
2021-10-26 13:28:33 +02:00

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## Syntax highlighting for Javascript.
syntax javascript "\.js$"
comment "//"
# Declarational stuff.
color green "\<(async|class|const|extends|function|let|this|typeof|var|void)\>"
# Flow control and special keywords.
color brightyellow "\<(do|while|if|else|switch|case|default|for|each|in|of|with)\>"
color brightyellow "\<(await|export|import|throw|try|catch|finally|new|delete)\>"
# "Exit" points.
color magenta "\<(break|continue|return|yield)\>"
# Octal/decimal and hexadecimal numbers.
color cyan "\<([0-9]+|0x[0-9A-Fa-f]+)\>"
# Special values.
color cyan "\<(true|false|null|undefined)\>"
# Strings.
color brightmagenta ""(\\.|[^"])*"|'(\\.|[^'])*'|`(\\.|[^`])*`"
# Comments.
color brightblue "(^|[[:blank:]])//.*"
color brightblue start="/\*" end="\*/"
# Trailing whitespace.
color ,green "[[:space:]]+$"