I have this:
var str = A123B234C456;
I need to split it into comma-separated chunks to return something like this:
A,123,B,234
You can do it by replace() using a regular expression.
For example,
var str = "A123B234C456"; str = str.replace(/([a-bA-B])/g, '$1,');
Now the value of str will be 'A,123,B234,C456'.