split line via regex in javascript?

Question

I have this structure of text :

1.6.1 Members................................................................ 12
1.6.2 Accessibility.......................................................... 13
1.6.3 Type parameters........................................................ 13
1.6.4 The T generic type aka <T>............................................. 13

I need to create JS objects :

{ 
  num:"1.6.1",
  txt:"Members"
},
{ 
  num:"1.6.2",
  txt:"Accessibility"
} ...

That's not a problem.

The problem is that I want to extract values via Regex split via positive lookahead :

Split via the first time you see that next character is a letter

What have i tried :

'1.6.1 Members........... 12'.split(/\s(?=(?:[\w\. ])+$)/i)

This is working fine :

["1.6.1", "Members...........", "12"] // I don't care about the 12.

But If I have 2 words or more :

'1.6.3 Type parameters................ 13'.split(/\s(?=(?:[\w\. ])+$)/i)

The result is :

["1.6.3", "Type", "parameters................", "13"] //again I don't care about 13.

Of course I can join them , but I want the words to be together.

Question :

How can I enhance my regex NOT to split words ?

Desired result :

["1.6.3", "Type parameters"]

or

["1.6.3", "Type parameters........"] // I will remove extras later

or

["1.6.3", "Type parameters........13"]// I will remove extras later

NB

I know I can do split via " " or by other simpler solution but I'm seeking ( for pure knowledge) for an enhancement for my solution which uses positive lookahead split.

Full online example :

nb2 :

The text can contain capital letter in the middle also.

Answer 1

You can use this regex:

/^(\d+(?:\.\d+)*) (\w+(?: \w+)*)/gm

And get your desired matches using matched group #1 and matched group #2.

Online Regex Demo

Update: For String#split you can use this regex:

/ +(?=[A-Z\d])/g

Regex Demo

Update 2: With the possibility of having capital letters also in chapter names following more complex regex is needed:

var re = /(\D +(?=[a-z]))| +(?=[a-z\d])/gmi; 
var str = '1.6.3 Type Foo Bar........................................................ 13';
var m = str.split( re );
console.log(m[0], ',', m.slice(1, -1).join(''), ',', m.pop() );

//=> 1.6.3 , Type Foo Bar........................................................ , 13