Consider the scenario outlined in the text below
I desire [this]. I also desire [this]. I do not desire \[this]
I am interested in extracting the content enclosed within [], but not including \[]. How should I approach this? Currently, I have tried using /\[([^\]]+)\]/gi, but it seems to match everything instead.
Utilize this regular expression pattern: /(?:^|[^\\])\[(.*?)\]/gi
To see a functioning example, click on the link provided:
?: Represents a non-capturing group^|[^\\] Matches either the beginning of the string or anything other than \\[(.*?)\] Matches any content within square brackets []Check out this code snippet for reference:
var text = "[this is what I need]I need [this]. I also need [this too]. Not interested in \\[no]";
var regexPattern = /(?:^|[^\\])\[(.*?)\]/gi;
var result = null;
document.write(text + "<br/><br/><b>Matches</b>:<br/> ");
while(result = regexPattern.exec(text)){
document.write(result[1] + "<br/>");
}To implement this regular expression, prioritize matching the \[] version first (without capturing it), then focus on capturing what's inside the [] cases:
let regExp = /\\\[.*?\]|\[(.*?)\]/g;
^^^^^^^^^ MATCH \[this]
^^^^^^^^^ MATCH [this]
Utilize a loop with `exec` to retrieve all the matches:
while(match = regExp.exec(str)){
console.log(match[1]);
}
/(?:[^\\]|^)\[([^\]]*)/g
The text you're looking for is stored in the first group, $1
(?:^|[^\\]) will find the start of a line or anything that isn't a backslash, without capturing it.
\[ will match an opening square bracket.
([^\]]*) will capture any sequence of characters that are not closing brackets.
\] matches a closing square bracket.
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