title: JS String: Add whitespace between numbers and letters
body: <p>i need a regular expression or any other method to add whitespaces between numbers and letters in a string.</p>
  
  <p>Example:</p>
  
  <pre><code>"E2356" =&gt; "E 2356"
  "E123-F456" =&gt; "E 123-F 456"
  </code></pre>
  
  <p>I already found a regular expression capable of it but it is not possible with Javascript:</p>
  
  <pre><code>(?&lt;=[^0-9])(?=[0-9])
  </code></pre>
  
  <p>Thanks!</p>