regex - JavaScript RegExp - find all prefixes up to a certain character -

i have string composed of terms separated slashes ('/'), example:

ab/c/def 

i want find prefixes of string occurrence of slash or end of string, i.e. above example expect get:

ab ab/c ab/c/def 

i've tried regex this: /^(.*)[\/$]/, returns single match - ab/c/ parenthesized result ab/c, accordingly.

edit :

i know can done quite using split, looking solution using regexp.

no, can't pure regex.

why? because need substrings starting @ 1 , same location in string, while regex matches non-overlapping chunks of text , advances index search match.

ok, capturing groups? helpful if know how many /-separated chunks have in input string. use

var  s = 'ab/c/def'; // there exact 3 parts  console.log(/^(([^\/]+)\/[^\/]+)\/[^\/]+$/.exec(s));  // => [ "ab/c/def", "ab/c", "ab" ]

however, unlikely know many details input string.

you may use following code rather regex:

var  s = 'ab/c/def';  var chunks = s.split('/');  var res = [];  for(var i=0;i<chunks.length;i++) {    res.length > 0 ? res.push(chunks.slice(0,i).join('/')+'/'+chunks[i]) : res.push(chunks[i]);  }  console.log(res);

first, can split string /. then, iterate through elements , build res array.