The JavaScript function String.split() is generating an array filled with 20 empty strings

Attempting to replicate the functionality of jQuery's string-based HTML element determination, I employed a split function. However, rather than returning a list of values as intended, it produced an array containing twenty empty strings.

console.log('button#hello.something'.split(/.|#/))

The resulting output is:

[
  '', '', '', '', '', '', '', '',
  '', '', '', '', '', '', '', '',
  '', '', '', '', '', '', ''     
]

Answer №1

. represents any individual character in regex; to match it, you must escape it with a backslash:

console.log('button#hello.something'.split(/\.|#/))

Answer №2

In order to accurately match dots and sharps in your regex, you must escape them with a backslash like this: /\.|\#/. Dots in regular expressions will match any character, so failing to escape them will cause your split function to effectively split the string by any character.

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