DataTables - Case Sensitive Doesn't Work for Some Characters

ocelikdemir

jQuery DataTables doesn't work for some local characters like uppercase "İ" and lowercase "ı". I tried case sensitive setting for "search" function but nothing changed.

I have created the following fiddle. Could you please check what I am doing wrong?
jsFiddle - Case Sensitive Issue

allan

Rather curoious this. Just plain Javascript in the console:

'ÇELİKDEMİR'.toLowerCase()
> "çeli̇kdemi̇r"

'Çelikdemir'.toLowerCase()
> "çelikdemir"

Looks good. However:

'Çelikdemir'.toLowerCase() === 'ÇELİKDEMİR'.toLowerCase()
> false

If I print out the character code from each string we can see why that is:

ÇELİKDEMİR = 231 101 108 105 775 107 100 101 109 105 775 114
Çelikdemir = 231 101 108 105 107 100 101 109 105 114

Even using toLocaleLowerCase makes no difference.

I think the closest we can get to supporting this is with this plug-in. Here is an updated example with it.

The downside is that you can't filter on a string which mixes non-ASCII characters and not. You either need to search with ASCII characters, which will match, or with the exact non-ASCII characters, which would also match. However Çelikdemir would not match since it is a mix of the two.

Allan

ocelikdemir

Dear Allan,
I found out another way. I know, it's not good way but it works. I have converted input field value as well as table values to uppercase on the fly. I modified the DataTables search function as below:

  "sSearch": val.toLocaleUpperCase('tr'),
  "bRegex": previousSearch.bRegex,

Github - Search Function

allan

Nice one - thanks for sharing that. This might be a really useful thing to include in the core, in a locale specific way, so I'll look into it further.

Allan