arrays - Simple JavaScript Split Function -

i'm questioning why got following output code:

'willie'.split(/[i-l]{1}/); // [ 'w', '', '', '', 'e' ]

i expecting ['w', 'e']. i'm not sure why it's inserting holes in array.

you splitting on single letter, each illi considered separator, , string splits follows:

 w     l   l     e # w   ""  ""  ""  e # if there's no content between separators, empty string in place  # or csv string w,,,,e split on comma ?

try using greedy quantifier + match pattern long can, illi considered 1 separator:

console.log('willie'.split(/[i-l]+/));

TY