e-commerce/input.js at master · rushikesh-jade/e-commerce · GitHub

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$(document).ready(
    function(){

    var quantitiy=0;
    $('.quantity-right-plus').click(function(e){

        // Stop acting like a button
        e.preventDefault();
        // Get the field name
        var quantity = parseInt($('#quantity').val());

        // If is not undefined

        $('#quantity').val(quantity + 1);
        // Increment
    });

    $('.quantity-left-minus').click(function(e){
        // Stop acting like a button
        e.preventDefault();
        // Get the field name
        var quantity = parseInt($('#quantity').val());

        // If is not undefined
        // Increment
        if(quantity>1){
            $('#quantity').val(quantity - 1);
        }
    });

});