之前未涉及的选项是：
- 反转字符串。
- 对反向字符串执行匹配。
- 重新反转匹配的字符串。
这具有能够正确匹配转义的打开标签的额外好处。
假设您有以下字符串；String \"this "should" NOT match\" and "this \"should\" match"
在这里，\"this "should" NOT match\"不应该匹配，"should"应该匹配。最重要的是this \"should\" match应该匹配\"should\"而不应该匹配。
首先是一个例子。
// The input string.
const myString = 'String \\"this "should" NOT match\\" and "this \\"should\\" match"';
// The RegExp.
const regExp = new RegExp(
// Match close
'([\'"])(?!(?:[\\\\]{2})*[\\\\](?![\\\\]))' +
'((?:' +
// Match escaped close quote
'(?:\\1(?=(?:[\\\\]{2})*[\\\\](?![\\\\])))|' +
// Match everything thats not the close quote
'(?:(?!\\1).)' +
'){0,})' +
// Match open
'(\\1)(?!(?:[\\\\]{2})*[\\\\](?![\\\\]))',
'g'
);
// Reverse the matched strings.
matches = myString
// Reverse the string.
.split('').reverse().join('')
// '"hctam "\dluohs"\ siht" dna "\hctam TON "dluohs" siht"\ gnirtS'
// Match the quoted
.match(regExp)
// ['"hctam "\dluohs"\ siht"', '"dluohs"']
// Reverse the matches
.map(x => x.split('').reverse().join(''))
// ['"this \"should\" match"', '"should"']
// Re order the matches
.reverse();
// ['"should"', '"this \"should\" match"']
好的，现在解释一下RegExp。这是正则表达式可以很容易地分为三部分。如下：
# Part 1
(['"]) # Match a closing quotation mark " or '
(?! # As long as it's not followed by
(?:[\\]{2})* # A pair of escape characters
[\\] # and a single escape
(?![\\]) # As long as that's not followed by an escape
)
# Part 2
((?: # Match inside the quotes
(?: # Match option 1:
\1 # Match the closing quote
(?= # As long as it's followed by
(?:\\\\)* # A pair of escape characters
\\ #
(?![\\]) # As long as that's not followed by an escape
) # and a single escape
)| # OR
(?: # Match option 2:
(?!\1). # Any character that isn't the closing quote
)
)*) # Match the group 0 or more times
# Part 3
(\1) # Match an open quotation mark that is the same as the closing one
(?! # As long as it's not followed by
(?:[\\]{2})* # A pair of escape characters
[\\] # and a single escape
(?![\\]) # As long as that's not followed by an escape
)
图像形式可能更清晰：使用Jex的Regulex生成
github上的图像（JavaScript正则表达式可视化器）。
对不起，我没有足够高的声誉来包含图像，因此，目前它只是一个链接。
这是使用此概念的示例函数的要点，该概念要先进一些：https : //gist.github.com/scagood/bd99371c072d49a4fee29d193252f5fc#file-matchquotes-js