使用正则表达式在后缀和前瞻之间获取带有括号和括号的字符串

Question

I've been researching using Regex in my JS project for a few hours now. I've run into an issue of trying to get the string between 'tags'. The only issue I have now is the characters I am using in the tag.

String I'm looking at:

[](/TABLE_1)
##Table 1
Header 1|Header 2|Header 3
:-:|:-:|:-:
Value 1|Value 2|Value 3
Value 1|Value 2|Value 3
[](/END_TABLE_1)

[](/TABLE_2)
##Table 2
Header 1|Header 2|Header 3
:-:|:-:|:-:
Value 1|Value 2|Value 3
Value 1|Value 2|Value 3
[](/END_TABLE_2)

[](/TABLE_3)
##Table 3
Header 1|Header 2|Header 3
:-:|:-:|:-:
Value 1|Value 2|Value 3
Value 1|Value 2|Value 3
[](/END_TABLE_3)

I am attempting to get the string inside

[](/TABLE_1)

and

[](/TABLE_2)

Currently, I am attempting to use the Regex expression:

(?<=[](/TABLE_1))(.*)(?=[](/END_TABLE_1))

I noticed that the tags I have, which I can't change, are not able to be detected in that.

Answer 1

You have to escaped ()[] because they are recognized as metacharacters in regex and you shouldn't use (?<=)(?=) positive lookbehinds in JavaScript.

Regex : \\[\\]\\(\\/(TABLE_[12])\\)\\n([\\S\\s]+)\\n\\[\\]\\(\\/END_\\1\\)

 var text = `[](/TABLE_1) ##Table 1 Header 1|Header 2|Header 3 :-:|:-:|:-: Value 1|Value 2|Value 3 Value 1|Value 2|Value 3 [](/END_TABLE_1) [](/TABLE_2) ##Table 2 Header 1|Header 2|Header 3 :-:|:-:|:-: Value 1|Value 2|Value 3 Value 1|Value 2|Value 3 [](/END_TABLE_2) [](/TABLE_3) ##Table 3 Header 1|Header 2|Header 3 :-:|:-:|:-: Value 1|Value 2|Value 3 Value 1|Value 2|Value 3 [](/END_TABLE_3)`; var re = /\\[\\]\\(\\/(TABLE_[12])\\)\\n([\\S\\s]+)\\n\\[\\]\\(\\/END_\\1\\)/g; var m; do { m = re.exec(text); if (m) { console.log(m[2]); } } while (m);