const regex = /'([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*'/gi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('\'([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*([^a\']*)a*\'', 'gi')
const str = `This is a text sample.
'And this is a single-quoted text sample'.
And this is another text sample.
"And this is a double-quoted text sample".
And this is another text sample.
"Nothing to do here".
And this is another text sample.
'Nothing to do here'.
And this is another text sample.
'And this is another single-quoted text sample'.
And this is another text sample.
"And this is another double-quoted text sample with a lot of a characters a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a".
`;
const subst = `'\1\2\3\4\5\6\7\8\9\10\11\12\13\14\15\16\17\18\19\20\21\22\23\24\25\26\27\28\29\30\31\32\33\34\35\36\37\38\39\40\41\42\43\44\45\46\47\48\49\50\51\52\53\54\55\56\57\58\59\60\61\62\63\64\65\66\67\68\69\70\71\72\73\74\75\76\77\78\79\80\81\82\83\84\85\86\87\88\89\90\91\92\93\94\95\96\97\98\99'`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions