使用正则表达式的两个预读字符串

Question

I have a simple regex that looks like the following:

var myRegex = /%(?!FOO%)([A-Za-z_]*)%/g; 

What I'm trying to do is find any instance of between two literal % quotes that isn't FOO . So anything like BAR , WHATEVER etc would match.

My question is, what's the best way to extend this to look for multiple strings? Let's say I want to match anything that isn't FOO or BAR .

var myRegex = /%(?!(FOO|BAR)%)([A-Za-z_]*)%/g; 

I tried the variant above, but that only seems to find the first match, FOO . How do I make it find both?

Answer 1

You could try something like this : ( assuming this is what you wanna accomplish )

General way ( w/ lookbehind support )

(?<=%)(?!FOO|BAR)(\w+)(?=%)

JavaScript way ( w/o lookbehind support )

 var str = '%FOO%HELLO%BAR%WORLD%'; var match = str.match(/%(?!FOO|BAR)(\\w+)(?=%)/g).map(e => { return e.replace('%', ''); }); console.log(match);