Allow passing a function to .data() as an each style setter.

[gnarf]

Example Usage:

jQuery( ".button" ).data(function( index, data ) {
    if ( data.href ) {
         // <div class="button" data-href="/">
    }
    if ( data.confirm ) {
         // etc
    }
    jQuery( this ).button();
    // return value discarded, data must remain the same object for other uses
});

The code would be a pretty simple each, and it would let you quickly inspect/alter the data object on an entire jQuery collection.

The same could NOT be done for the elems.data( "key", fn ) signature, because you want to set that key to a function...

Pull Request: ​https://github.com/jquery/jquery/pull/910

[timmywil]

Safe to say this ticket is open.

[dmethvin]

Bulk change from enhancement to feature.

[mikesherov]

+1, it's done already, and it's useful.

[ajpiano]

-1, I think this is just too viscerally of an odd duck to add. It's sort of a function setter, sort of a getter... It's basically with (dataObj) { } - I don't think we need it.

[dmethvin]

-1, It's a unique signature and there is already a way to do this, so making an exception is less compelling.

[Rick Waldron]

-1, data() is closed

[gnarf]

+1, Feel so dirty, voting on my own idea. It's a connivence method for plugin authors really. Or people doing large amounts of editing of the data object. I won't be offended if we pass on it though.

[gibson042]

-1, complexity of the new signature is greater than the low cost of ad-hoc manual implementation