Get attribute with JS

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1

I'm trying to make a product cart, and that's fine, it's already working, beautiful thing, but, as always, there are problems, I'm kind of new to JS, so I'm picking up a lot,

HTML 

<button class="add-to-cart" data-price="25.99">
    <em>Adicionar ao Carrinho</em>
    <svg x="0px" y="0px" width="32px" height="32px" viewBox="0 0 32 32">
        <path stroke-dasharray="19.79 19.79" stroke-dashoffset="19.79" fill="none" stroke="#FFFFFF" stroke-width="2" stroke-linecap="square" stroke-miterlimit="10" d="M9,17l3.9,3.9c0.1,0.1,0.2,0.1,0.3,0L23,11"/>
    </svg>
</button>

JS 

addToCartBtn.on('click', function() {   updateCart(); });
function updateCart() {var cartWrapper = $('.cd-cart-container'),
    cartWrapperPrice = cartWrapper.find('.add-to-cart'),
    cartPrice = cartWrapperPrice.attr('data-price'),
    cartBody = cartWrapper.find('.body'),
    cartList = cartBody.find('.cd-cart-items');
    productAdded = $('<li><span class="cd-qty">1x</span>Produto<div class="cd-price">'+cartPrice+'</div><a href="#" class="cd-item-remove cd-img-replace">Remove</a></li>');
    cartList.prepend(productAdded);};

The above one returns me "undefined".

This from below, I get the price, but when I test in another with a different value, it returns only one value, as if it were the one value for all products. 

var cartWrapper = $('.cd-cart-container'),
    cartWrapperPrice = $('.add-to-cart'),
    cartPrice = cartWrapperPrice.attr('data-price'),
    cartBody = cartWrapper.find('.body'),
    cartList = cartBody.find('.cd-cart-items');
    productAdded = $('<li><span class="cd-qty">1x</span>Produto<div class="cd-price">'+cartPrice+'</div><a href="#" class="cd-item-remove cd-img-replace">Remove</a></li>');
    cartList.prepend(productAdded);
    
asked by anonymous 13.12.2017 / 02:06

1 answer

1

In the first case, you can do this by sending the element as a parameter to the function: 

addToCartBtn.on('click', function() {   updateCart($(this)); });

And in the function, you can use the i.data("price") syntax to get the value of the attribute: 

function updateCart(i) {
   var cartWrapper = $('.cd-cart-container'),
   cartPrice = i.data("price"),
   cartBody = cartWrapper.find('.body'),
   cartList = cartBody.find('.cd-cart-items');
   productAdded = $('<li><span class="cd-qty">1x</span>Produto<div class="cd-price">'+cartPrice+'</div><a href="#" class="cd-item-remove cd-img-replace">Remove</a></li>');
   cartList.prepend(productAdded);
};

In the second case, it would be almost the same thing: 

var cartWrapper = $('.cd-cart-container'),
    cartWrapperPrice = $('.add-to-cart'),
    cartPrice = cartWrapperPrice.data('price'),
    cartBody = cartWrapper.find('.body'),
    cartList = cartBody.find('.cd-cart-items');
    productAdded = $('<li><span class="cd-qty">1x</span>Produto<div class="cd-price">'+cartPrice+'</div><a href="#" class="cd-item-remove cd-img-replace">Remove</a></li>');
    cartList.prepend(productAdded);

See: 

addToCartBtn= $(".add-to-cart");

addToCartBtn.on('click', function() {   updateCart($(this)); });

var cartWrapper = $('.cd-cart-container'),
    cartWrapperPrice = $('.add-to-cart'),
    cartPrice = cartWrapperPrice.data('price'),
    cartBody = cartWrapper.find('.body'),
    cartList = cartBody.find('.cd-cart-items');
    productAdded = $('<li><span class="cd-qty">1x</span>Produto<div class="cd-price">'+cartPrice+'</div><a href="#" class="cd-item-remove cd-img-replace">Remove</a></li>');
    cartList.prepend(productAdded);
   console.log("Valor fora da função: "+cartPrice);

function updateCart(i) {
   var cartWrapper = $('.cd-cart-container'),
   cartPrice = i.data("price"),
   cartBody = cartWrapper.find('.body'),
   cartList = cartBody.find('.cd-cart-items');
   productAdded = $('<li><span class="cd-qty">1x</span>Produto<div class="cd-price">'+cartPrice+'</div><a href="#" class="cd-item-remove cd-img-replace">Remove</a></li>');
   cartList.prepend(productAdded);
   console.log("Valor dentro da função: "+cartPrice);
};
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><buttonclass="add-to-cart" data-price="25.99">
    <em>Adicionar ao Carrinho</em>
    <svg x="0px" y="0px" width="32px" height="32px" viewBox="0 0 32 32">
        <path stroke-dasharray="19.79 19.79" stroke-dashoffset="19.79" fill="none" stroke="#FFFFFF" stroke-width="2" stroke-linecap="square" stroke-miterlimit="10" d="M9,17l3.9,3.9c0.1,0.1,0.2,0.1,0.3,0L23,11"/>
    </svg>
</button>
    
13.12.2017 / 02:16
The .NET Framework 4.7.1 or a later update has already been installed on the computer My JLabel does not appear [closed]