how to filter blog page using dropdown or slider

I know how to filter with a dropdown selection using a repeater by setting a filter on the data connection. i would like to have this function on the standard blog page. Since there is no data connecter used in this I have no clue how to filter this.

Of course, you can use the basic categories/tags but with a lot of categories/tags this becomes a real mess.

For others, this is a way to do this with a repeater;

import {wixData} from ‘wix-data’ ;

export function dropdown1_change(event, $w) {
$w( “#dataset3” ).setFilter(wixData.filter()

    .contains( "title" , $w( '#dropdown1' ).value)) 

.then((results) => { 
        console.log( "Data is now filtered" ); 
        $w( "repeater1" ).data = results.items; 
    }). catch ((err) => { 
        console.log(err); 
    }); 
$w( "repeater1" ).expand();   

}

Eventually i would like to have something like Wix Stores: Adding Sort and Filter Options to Your Product Gallery | Help Center | Wix.com for my blog page