57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
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function updateTotal(amount) {
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total_el = document.getElementById('total')
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total = parseFloat(total_el.innerText)
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total += amount
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total_el.innerText = total.toFixed(2)
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}
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function renderBasketItem(uid, name) {
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return '<button id="basketitem_' + uid + '"' +
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'onclick="delProduct(' + uid + ')">' +
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'1 x ' + name +
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'</button>'
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}
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function addProduct(uid) {
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// This is the hidden input element inside the form. We'll use this DOM
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// element to keep informations about the product, such as the name,
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// the price and the value inside the 'data-' tag.
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form_el = document.getElementById('prod_' + uid)
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basket = document.getElementById('basket')
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basket_el = document.getElementById('basketitem_' + uid)
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form_el.value = parseInt(form_el.value) + 1
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// If there is not a button for the given product inside the basket
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// div we'll create it.
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if (basket_el === null) {
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basket.innerHTML += renderBasketItem(uid, form_el.dataset.name)
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} else {
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// Otherwise we'll just update it.
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console.log(form_el.value)
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new_text = form_el.value + ' x ' + form_el.dataset.name
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basket_el.innerText = new_text
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}
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updateTotal(parseFloat(form_el.dataset.price))
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}
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function delProduct(uid) {
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form_el = document.getElementById('prod_' + uid)
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basket = document.getElementById('basket')
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basket_el = document.getElementById('basketitem_' + uid)
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form_el.value = parseInt(form_el.value) - 1
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if (form_el.value == 0) {
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basket.removeChild(basket_el)
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} else {
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new_text = form_el.value + ' x ' + form_el.dataset.name
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basket_el.innerText = new_text
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}
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updateTotal(parseFloat(-form_el.dataset.price))
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}
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