当用户在不重新加载页面的情况下选择商品时，我想用商品“数据价格”自动填充“单价”输入。
<div class="row">
<div class="col-sm-3">
<p>Testers<br>
<select id="productOne" name="productOne">
<option data-price="1249.99" value="1">PRO Battery Tester</option>
<option data-price="444.99" value="2">MDX335P</option>
<option data-price="494.99" value="3">MDX645</option>
<option data-price="694.99" value="4">MDX645P</option>
<option data-price="694.99" value="5">MDX655</option>
<option data-price="899.99" value="6">MDX655P</option>
<option data-price="949.99" value="7">MDX655P Start Stop</option>
</select></p>
<p>Chargers<br>
<select id="productTwo" name="productTwo">
<option data-price="1249.99" value="1">PRO 60</option>
<option data-price="1249.99" value="2">MXTS 70/50 EU-K</option>
<option data-price="333.33" value="3">MXS 25EC UK</option>
<option data-price="199.99" value="4">MXS 10EC UK</option>
<option data-price="633.33" value="5">MXTS 40 UK</option>
<option data-price="266.66" value="6">MXS 25 UK</option>
<option data-price="266.66" value="7">MXT 14 UK</option>
<option data-price="175.83" value="8">MXT 4.0 UK</option>
</select></p>
</div>
<div class="col-sm-3">
<p>Quantity<br><input type="number" name="productOneQ" min="0" step="any" value="<?php if(!is_null($productOneQ)) { echo $productOneQ; } ?>"></p>
<p>Quantity<br><input id="productTwoQ" type="number" name="productTwoQ" min="0" step="any" value="<?php if(!is_null($productTwoQ)) { echo $productTwoQ; } ?>"></p>
</div>
<div class="col-sm-3">
<p>Unit Price<br><input id="productOneP" type="number" name="productOneP" min="0" step="any" value="<?php if(!is_null($productOneP)) { echo $productOneP; } ?>"></p>
<p>Unit Price<br><input id="productTwoP" type="number" name="productTwoP" min="0" step="any" value="<?php if(!is_null($productTwoP)) { echo $productTwoP; } ?>"></p>
</div>
<div class="col-sm-3">
<p><span id="productOneT" class="total right">TOTAL: £<?php echo number_format($productOneTotal = $productOneP*$productOneQ, 2, '.', ','); ?></span></p>
<p><span id="productTwoT" class="total right">TOTAL: £<?php echo number_format($productTwoTotal = $productTwoP*$productTwoQ, 2, '.', ','); ?></span></p>
</div>
</div>
</div>
最佳答案
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<body>
<div class="row">
<div class="col-sm-3">
<p>Testers<br>
<select id="productOne" name="productOne">
<option data-price="0" value="0">-Select-</option>
<option data-price="1249.99" value="1">PRO Battery Tester</option>
<option data-price="444.99" value="2">MDX335P</option>
<option data-price="494.99" value="3">MDX645</option>
<option data-price="694.99" value="4">MDX645P</option>
<option data-price="694.99" value="5">MDX655</option>
<option data-price="899.99" value="6">MDX655P</option>
<option data-price="949.99" value="7">MDX655P Start Stop</option>
</select></p>
<p>Chargers<br>
<select id="productTwo" name="productTwo">
<option data-price="0" value="0">-Select-</option>
<option data-price="1249.99" value="1">PRO 60</option>
<option data-price="1249.99" value="2">MXTS 70/50 EU-K</option>
<option data-price="333.33" value="3">MXS 25EC UK</option>
<option data-price="199.99" value="4">MXS 10EC UK</option>
<option data-price="633.33" value="5">MXTS 40 UK</option>
<option data-price="266.66" value="6">MXS 25 UK</option>
<option data-price="266.66" value="7">MXT 14 UK</option>
<option data-price="175.83" value="8">MXT 4.0 UK</option>
</select></p>
</div>
<div class="col-sm-3">
<p>Quantity<br><input type="number" name="productOneQ" min="0" step="any" value="<?php if(!is_null($productOneQ)) { echo $productOneQ; } ?>"></p>
<p>Quantity<br><input id="productTwoQ" type="number" name="productTwoQ" min="0" step="any" value="<?php if(!is_null($productTwoQ)) { echo $productTwoQ; } ?>"></p>
</div>
<div class="col-sm-3">
<p>Unit Price<br><input id="productOneP" type="number" name="productOneP" min="0" step="any" value="<?php if(!is_null($productOneP)) { echo $productOneP; } ?>"></p>
<p>Unit Price<br><input id="productTwoP" type="number" name="productTwoP" min="0" step="any" value="<?php if(!is_null($productTwoP)) { echo $productTwoP; } ?>"></p>
</div>
<div class="col-sm-3">
<p><span id="productOneT" class="total right">TOTAL: £<?php echo number_format(@$productOneTotal = $productOneP*$productOneQ, 2, '.', ','); ?></span></p>
<p><span id="productTwoT" class="total right">TOTAL: £<?php echo number_format(@$productTwoTotal = $productTwoP*$productTwoQ, 2, '.', ','); ?></span></p>
</div>
</div>
</div>
<script>
$('#productOne').change(function(e) {
var element = $(this).find('option:selected');
var myTag = element.attr("data-price");
$('#productOneP').val(myTag);
});
$('#productTwo').change(function(e) {
var element = $(this).find('option:selected');
var myTag = element.attr("data-price");
$('#productTwoP').val(myTag);
});
</script>
</body>
</html>关于javascript - 自动填充字段取决于所选的选项，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/41737879/