//Css
$('elem').css('prop','val')

//classes
$('elem').addClass();
$('elem').removeClass();
$('elem').toggleClass();


$('.galleryBox').css('width');
//It will display 'width in pixels' properties of selector.

$('.galleryBox').width();
//It will display the width only in numbers ( no units )
//It will display the height only in numbers ( no units )
$('.galleryBox').height();

//chechbox toggle/update/check
let checkBox = $('input:checkbox').is(":checked");
console.log(checkBox)
//It will True if it's checked, False if unchecked.