New Project My Counter App - Working on Undo button Still Working My Counter Link - https://bhagyeshpro.github.io/mycounter.github.io/ Code JS - let count = 0 ; // select buttons and value const value = document . querySelector ( "#value" ) ; const btns = document . querySelectorAll ( ".btn" ) ; function doUndo ( numberIs ) { numberIs = count ; return numberIs ; } // console.log(btns); btns . forEach ( function ( btn ) { btn . addEventListener ( "click" , function ( e ) { const styles = e . currentTarget . classList ; // let previous = count; // console.log(pervious); if ( styles . contains ( 'decrease' ) ) { count -- ; // console.log(count); } else if ( styles . contains ( 'increase' ) ) { count ++ ; // console.log(count); } else if ( styles . contains ( 'reset' ) ) { count = 0 ; } else if ( styles . co...