javascript - jQuery carousel - any number of images -

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i have flickity carousel of images that, when click image/slide, opens modal window show zoomed in version of said image. within modal have left , right buttons scroll through zoomed in images.

my problem code breaks if have more or less 3 images in slider. need convert not break no matter how many images have, whether 1, 4, 2 or 8 etc. how do this?

my js below has been reduced show relevant bits. have function right button too. see jsfiddle current situation: https://jsfiddle.net/293sh54n/6/

js

var activedivimg; $( ".product--slider .slide" ).each(function( index ) {   // show modal window   $('#product-slider-flickity img').click(function(){     activedivimg = parseint($(this).parent().index());     console.log(activedivimg)     $("#imageshow").html('<img src="'+$(this).attr('src')+'"/>');     $(".p-image-zoom").addclass("md-show");   }); }); // zoomed in controls - scroll left button $('.left').click(function(){    if(activedivimg < 1 ){     activedivimg = 2    }else{       console.log('kundi'+activedivimg)       activedivimg = activedivimg - 1    }    console.log('left'+activedivimg)    $("#imageshow").html('<img src="'+$('.slide').eq(activedivimg).find('img').attr('src')+'"/>');     console.log(activedivimg+"asd") });

first of should images count. after in left click use activedivimg = imagescount - 1; instead of activedivimg = 2; same thing right click. fiddle

var imagecount = $('.slide').length; var activedivimg; $( ".product--slider .slide" ).each(function( index ) {   // show modal window   $('#product-slider-flickity img').click(function(){     activedivimg = parseint($(this).parent().index());     console.log(activedivimg)     $("#imageshow").html('<img src="'+$(this).attr('src')+'"/>');     $(".p-image-zoom").addclass("md-show");   }); }); // zoomed in controls - scroll left button $('.left').click(function(){    if(activedivimg < 1 ){     activedivimg = imagescount - 1;    }else{       console.log('kundi'+activedivimg)       activedivimg = activedivimg - 1    }    console.log('left'+activedivimg)    $("#imageshow").html('<img src="'+$('.slide').eq(activedivimg).find('img').attr('src')+'"/>');     console.log(activedivimg+"asd") });

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