var s="aaaabbbb";
console.log( s.match(/a+b/)+"" );
console.log( s.match(/a+b+/)+"" );
console.log( s.match(/ab+/)+"" );
console.log( s.match(/x+b+/)+"" );
Ответ:
aaaab
aaaabbbb
abbbb
null
JavaScript test | #JavaScript
JA JavaScript test @js_test · 9.67K subscribers var s="aaaabbbb";
console.log( s.match(/a+b/)+"" );
console.log( s.match(/a+b+/)+"" );
console.log( s.match(/ab+/)+"" );
console.log( s.match(/x+b+/)+"" );