javascript 将表单中的输入添加到同一页面中的表中，无需重新加载
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时间：2020-10-27 16:30:56 来源:igfitidea点击:
Add input from a form to a table in the same page without reloading
提问by Javier Lopez
Im trying to make the input from the user in a html form be added to a table that adds up the total price of all the products in the same page all of this without reloading.
我试图将来自用户的 html 表单输入添加到一个表格中，该表格将同一页面中所有产品的总价格相加，而无需重新加载。
here is my html form and table code
这是我的 html 表单和表格代码
Thank you in advance
先感谢您
<h1>Instructions</h1>
<section>
<p>Please enter the desired product/services in the following table to create an order.</p>
<section style="width:300px; margin-left:20px">
<form action="" name="order" method="POST" autocomplete="off">
<table width="300" border="0" cellspacing="5" cellpadding="2">
<tr>
<td>
<label for="product">Product:</label>
</td>
<td>
<input name="product" id="product" required pattern="[a-zA-Z ]*$" title="Please enter only alphabetic characters" type="text" placeholder="Product name" size="28" />
</td>
</tr>
<tr>
<td>
<label for="quantity">Quantity:</label>
</td>
<td>
<input name="quantity" id="quantity" required type="number" title="Enter item quantity" placeholder="Product quantity" width="196px" />
</td>
</tr>
<tr>
<td>
<label for="price">Price:</label>
</td>
<td>
<input name="price" id="price" required pattern="[0-9]" title="Please enter only numeric characters" placeholder="Product price" size="28" />
</td>
</tr>
</table>
<br>
<div id="buttons">
<input type="reset" name="reset" id="resetbtn" class="resetbtn" value="Reset">
<input type="submit" name="submit" id="submitbtn" class="submitbtn" tabindex="7" value="Submit this!" onclick="">
<br style="clear:both;">
</div>
</form>
</section>
</section>
<table width="416" border="0" cellspacing="5" cellpadding="2">
<tr>
<th width="115" scope="col">Products</th>
<th width="112" scope="col">Quantity</th>
<th width="92" scope="col">Price</th>
<th width="56"></th>
</tr>
<tr>
<td scope="col"> </th>
<td scope="col">
</th>
<td scope="col"> </th>
<th>Total</th>
</tr>
</table>
回答by tremor
This is a simple update to what you have that works. Part of your question was to avoid page reloading, so you will notice the FORM no longer does a POST action and your SUBMIT BUTTON is no longer an input but a standard button with an onClick action. This will allow everything to execute without navigating away from the page. For the sake of time I put the results addition in a separate table, feel free to style how you wish.
这是对您所拥有的有效内容的简单更新。您的部分问题是为了避免页面重新加载，因此您会注意到 FORM 不再执行 POST 操作，并且您的 SUBMIT BUTTON 不再是输入，而是具有 onClick 操作的标准按钮。这将允许在不离开页面的情况下执行所有操作。为了节省时间，我将结果加法放在一个单独的表格中，您可以随意设置您希望的样式。
<html>
<head>
<title>Order</title>
<script type="text/javascript">
var qtyTotal = 0;
var priceTotal = 0;
function updateForm() {
var product = document.getElementById("product").value;
var qty = document.getElementById("quantity").value;
qtyTotal = qtyTotal + parseInt(qty);
document.getElementById("qtyTotals").innerHTML=qtyTotal;
var price = document.getElementById("price").value;
priceTotal = priceTotal + parseInt(price);
document.getElementById("priceTotals").innerHTML=priceTotal;
var table=document.getElementById("results");
var row=table.insertRow(-1);
var cell1=row.insertCell(0);
var cell2=row.insertCell(1);
var cell3=row.insertCell(2);
cell1.innerHTML=product;
cell2.innerHTML=qty;
cell3.innerHTML=price;
}
</script>
</head>
<body>
<form name="order" id="order">
<table>
<tr>
<td>
<label for="product">Product:</label>
</td>
<td>
<input id="product" name="product" title="Please enter only alphabetic characters" type="text" size="28" />
</td>
</tr>
<tr>
<td>
<label for="quantity">Quantity:</label>
</td>
<td>
<input id="quantity" name="quantity" title="Enter item quantity" width="196px" />
</td>
</tr>
<tr>
<td>
<label for="price">Price:</label>
</td>
<td>
<input id="price" name="price" title="Please enter only numeric characters" size="28" />
</td>
</tr>
</table>
<input type="reset" name="reset" id="resetbtn" class="resetbtn" value="Reset" />
<button type="button" onClick="updateForm();"/>Add To Table</button>
</form>
<br>
<table id="results" width="360">
<thead>
<tr>
<th scope="col" width="120">Products</th>
<th scope="col" width="120">Quantity</th>
<th scope="col" width="120">Price</th>
</tr>
</thead>
</table>
<table id="resultTotals" width="360">
<tr>
<td scope="col" width="120">Totals</td>
<td scope="col" width="120"><div id="qtyTotals"></div></td>
<td scope="col" width="120"><div id="priceTotals"></div></td>
</tr>
</table>
</body></html>
Here is JS Fiddle Example of above code.
回答by max
<section>
<p>Please enter the desired product/services in the following table to create an order.</p>
<section style="width:300px; margin-left:20px">
<form action="" name="order" method="POST" autocomplete="off">
<table id="cart" width="300" border="0" cellspacing="5" cellpadding="2">
<tr>
<td>
<label for="product">Product:</label>
</td>
<td>
<input name="product" required pattern="[a-zA-Z ]*$" title="Please enter only alphabetic characters" type="text" placeholder="Product name" size="28" />
</td>
</tr>
<tr>
<td>
<label for="quantity">Quantity:</label>
</td>
<td>
<input name="quantity" required type="number" title="Enter item quantity" placeholder="Product quantity" width="196px" />
</td>
</tr>
<tr>
<td>
<label for="price">Price:</label>
</td>
<td>
<input name="price" required pattern="[0-9]" title="Please enter only numeric characters" placeholder="Product price" size="28" />
</td>
</tr>
</table>
<br>
<div id="buttons">
<input type="reset" name="reset" id="resetbtn" class="resetbtn" value="Reset">
<input type="submit" name="submit" id="submitbtn" class="submitbtn" tabindex="7" value="Submit this!" onclick="">
<br style="clear:both;">
</div>
</form>
</section>
</section>
<table width="416" border="0" cellspacing="5" cellpadding="2" id="cart">
<tr>
<th width="115" scope="col">Products</th>
<th width="112" scope="col">Quantity</th>
<th width="92" scope="col">Price</th>
<th width="56"></th>
</tr>
<tr>
<td id="items">
</td>
</tr>
<tr>
<td scope="col"> </th>
<td scope="col">
</th>
<td scope="col"> </th>
<th>Total</th>
<td id="total">0</td>
</tr>
</table>
<script>
$(document).ready(function(){
var form = document.order;
var $checkout = $('#cart');
// Listen for form submit
$(form).on('submit', function(e){
// Prevent browser from sending form
e.preventDefault();
// this is a row thats nt yet attached to the document
var $row = $('<tr class="item">');
/*
* Loop through fields and add 'product','quantity','price'
* to $row. we store the data on the node as well
*/
$.each(['product','quantity','price'],function(index, key){
var $td = $('<td>');
var value = form[key].value;
$td.addClass(key).text(value);
$row.data(key, value);
$row.append($td);
});
// Attach the $row to the document
$('#items').append($row);
// Update the totals
$checkout.trigger('change');
});
// Update totals when cart changes
$checkout.on('change',function(){
var total = 0;
$(this).find('.item').each(function(){
var quant = parseFloat($(this).data('quantity'));
var price = parseFloat($(this).data('price'));
total = total + (quant * price);
});
$('#total').text(total);
});
});
</script>
