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I have a regex created by myself that I am currently running in PHP. Although when I merge it over to JavaScript, it refuses to work. I have also tried it in Python and it works perfectly fine.
Regex:
@[[](.[^]]+)[]][()](\d+)[)]
Testing in PHP, and working
Testing in JavaScript, and not working
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In JavaScript, you can write RegExp patterns using simple patterns, special characters, and flags.
There is a difference between Java and JavaScript regex flavors: JS does not support lookbehind. A tabulation of differences between regex flavors can be found on Wikipedia. However, this does not apply to your case.
In PHP, regular expressions are strings composed of delimiters, a pattern and optional modifiers. $exp = "/w3schools/i"; In the example above, / is the delimiter, w3schools is the pattern that is being searched for, and i is a modifier that makes the search case-insensitive.
Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects. These patterns are used with the exec() and test() methods of RegExp , and with the match() , matchAll() , replace() , replaceAll() , search() , and split() methods of String .
JavaScript doesn't automatically escape your ].
This will help you get a visual idea:
So to fix this, you need to escape the brackets
@[[](.[^\]]+)[\]][()](\d+)[)]
// ^ ^
The best way to write this regex is to minimize the use of character classes:
@\[(.[^\]]+)\][()](\d+)\)
That's why it's good practice to escape this stuff instead of relying on quirks of the flavor.
I generated these images through regex101.
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