javascript split on non-alphanumeric an keep delemiters at start

Question

I'm currently recoding some of my PHP code into javascript code for my node.js server.

My PHP-Reqex looks like this:

$timevalue = "W5D4H7M34S12";
$aSplitted = preg_split('#(?<=\d)(?=[a-z])#i', $timevalue);

The result for $aSplitted looks like this:

["W5","D4","H7","M34","S12"]

This is what I tried in javascript:

var aSplitted = timevalue.split(/(?<=\d)(?=[a-z])#i/g);

Or

var aSplitted = timevalue.split((?<=\d)(?=[a-z])#i);

Or

var aSplitted = timevalue.split('(?<=\d)(?=[a-z])#i');

but it wont work.

I've also tried something like this:

var aSplitted = timevalue.split(/[^A-Za-z]/);

But it only gives me the chars without the numbers after.

Maybe some of you know the solution?

Answer 1

1. split accepts the delimiter, and splits the string by the delimiter. You are looking for match.

2. In the JavaScript syntax, # should be replaced with /. But you've combined the PHP and JS syntax, not valid.

3. Lookbehinds are not supported by JS

4. Just simplify it.

To get the matches, you should use

var timevalue = "W5D4H7M34S12";
var aSplitted = timevalue.match(/[a-z]\d+/ig);

document.write(JSON.stringify(aSplitted))