break js

gistfile1.txt

// Code goes here

var regexString = '([^-]*)';
var flags = 'ig';
var regex = new RegExp(regexString, flags);

var arr = ['some-property-image.png', 'another-prop-video.png', 'y-no-work.bmp'];
var result = [];

arr.forEach(function (item) {
  var match;
  var inter = [];
  while(match = regex.exec(item)) {
    inter.push(match[0]);
  }
});

console.log(result);