javascript - 将输入框中的值乘以表中的固定值 (HTML)

Question

我正在尝试创建一个表格，其中行中第一个单元格的值将乘以表格第二个单元格(同一行)的值。

当我有两个输入框时，我完成了这项工作。但当我只有一个输入框和一个固定值时，它不起作用。这是有效的代码片段:

 $(document).ready(function () {
       $(".txtMult input").keyup(multInputs);

       function multInputs() {
           var mult = 0;
           $("tr.txtMult").each(function () {
               var $val1 = $('.val1', this).val();
               var $val2 = $('.val2', this).val();
               var $total = ($val1 * 1) * ($val2 * 1) - ($val1 * 1)
               $('.multTotal',this).text($total.toPrecision(2));
               mult += $total;
           });
           $("#grandTotal").text(mult);
       }
  });

  
h1{
  font-size: 30px;
  color: #fff;
  text-transform: uppercase;
  font-weight: 300;
  text-align: center;
  margin-bottom: 15px;
}
table{
  width:100%;
  table-layout: fixed;
}
.tbl-header{
  background-color: rgba(255,255,255,0.3);
 }
.tbl-content{
  height:300px;
  overflow-x:auto;
  margin-top: 0px;
  border: 1px solid rgba(255,255,255,0.3);
}
th{
  padding: 20px 15px;
  text-align: left;
  font-weight: 500;
  font-size: 12px;
  color: #fff;
  text-transform: uppercase;
}
td{
  padding: 15px;
  text-align: left;
  vertical-align:middle;
  font-weight: 300;
  font-size: 12px;
  color: #fff;
  border-bottom: solid 1px rgba(255,255,255,0.1);
}


/* demo styles */

@import url(http://fonts.googleapis.com/css?family=Roboto:400,500,300,700);
body{
  background: #fb887c;
  font-family: 'Roboto', sans-serif;
}
section{
  margin: 50px;
}


*,
*:after,
*::before {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.ac-custom {
	padding: 0 1em;
	max-width: 900px;
	margin: 0 auto;
}

.ac-custom h2 {
	font-size: 1em;
	font-weight: 300;
	padding: 0 0 0.5em;
	margin: 0 0 30px;
	color:#000;
}

.ac-custom ul,
.ac-custom ol {
	list-style: none;
	padding: 0;
	margin: 0 auto;
	max-width: 800px;
}

.ac-custom li {
	margin: 0 auto;
	padding: 0.5em 0;
	position: relative;
}

.ac-custom label {
	display: inline-block;
	position: relative;
	font-size: 1em;
	padding: 0 0 0 80px;
	vertical-align: top;
	color: #000;
	cursor: pointer;
	-webkit-transition: color 0.3s;
	transition: color 0.3s;
}

.ac-custom input[type="checkbox"],
.ac-custom input[type="radio"],
.ac-custom label::before {
	width: 20px;
	height: 20px;
	top: 50%;
	left: 0;
	margin-top: -12px;
	position: absolute;
	cursor: pointer;
}

.ac-custom input[type="checkbox"],
.ac-custom input[type="radio"] {
	opacity: 0;
	-webkit-appearance: none;
	display: inline-block;
	vertical-align: middle;
	z-index: 100;
}

.ac-custom label::before {
	content: '';
	border: 1px solid #000;
	-webkit-transition: opacity 0.3s;
	transition: opacity 0.3s;
}

.ac-radio label::before {
	border-radius: 50%;
}

.ac-custom input[type="checkbox"]:checked + label,
.ac-custom input[type="radio"]:checked + label {
	color: #fff;
} 

.ac-custom input[type="checkbox"]:checked + label::before,
.ac-custom input[type="radio"]:checked + label::before {
	opacity: 0.8;
}

/* General SVG and path styles */

.ac-custom svg {
	position: absolute;
	width: 20px;
	height: 20px;
	top: 50%;
	margin-top: -12px;
	left: 0px;
	pointer-events: none;
}

.ac-custom svg path {
	stroke: #fdfcd3;
	stroke-width: 13px;
	stroke-linecap: round;
	stroke-linejoin: round;
	fill: none;
}

/* Specific input, SVG and path styles */

/* Circle */
.ac-circle input[type="checkbox"],
.ac-circle input[type="radio"],
.ac-circle label::before {
	width: 30px;
	height: 30px;
	margin-top: -15px;
	left: 10px;
	position: absolute;
}

.ac-circle label::before {
	background-color: #fff;
	border: none;
}

.ac-circle svg {
	width: 70px;
	height: 70px;
	margin-top: -35px;
	left: -10px;
}

.ac-circle svg path {
	stroke-width: 5px;
} 

/* Box Fill */
.ac-boxfill svg path {
	stroke-width: 8px;
} 

/* Swirl */
.ac-swirl svg path {
	stroke-width: 8px;
}

/* List */
.ac-list ol {
	list-style: decimal;
	list-style-position: inside;
}

.ac-list ol li {
	font-size: 2em;
	padding: 1em 1em 0 2em;
	text-indent: -40px;
}

.ac-list ol li label {
	font-size: 0.5em;
	text-indent: 0;
	padding-left: 30px;
}

.ac-list label::before {
	display: none;
}

.ac-list svg {
	width: 100%;
	height: 80px;
	left: 0;
	top: 1.2em;
	margin-top: 0px;
}

.ac-list svg path {
	stroke-width: 4px;
}

.row {
  margin-left: -15px;
  margin-right: -15px;
}
.col-sm-4 {
  position: relative;
  min-height: 1px;
  padding-left: 15px;
  padding-right: 15px;
  padding-bottom: 30px;
}

@media (min-width: 768px) {
  .col-sm-4 {
    float: left;
  }

  .col-sm-4 {
    width: 33.33333333%;
  } 
 
 .filter-columns {
	background-color:#fdb5ad;
 }
 
 .filter-columns-alt {
	background-color:#fecbc6;
 }
 

<script src="https://code.jquery.com/jquery-1.10.2.js"></script>

    <tbody>
        <tr id="Memory1" class="part_detail txtMult">
            <td class="stake"><input class="val1"/></td>
            <td class="odds"><input class="val2"/></td>
			<td class="profit"><span class="multTotal">0.00</span></td>
        </tr>
      </tbody>

当我将 HTML 更改为:

<tbody>
<tr id="Memory1" class="part_detail txtMult">
    <td class="stake"><input class="val1"/></td>
    <td class="odds">2.2</td>
    <td class="profit"><span class="multTotal">0.00</span></td>
</tr>

Answer 1

您应该在 JavaScript 代码中使用 text() 而不是 val()，因为不再有输入字段，因此不存在相同的值。

使用var $val2 = $('.odds', this).text();而不是var $val2 = $('.val2', this).val();

如果子元素在标签内是动态的并且可以是两者

<td class="odds"><input class="val2"/></td>或<td class="odds">2.2</td>

您可以尝试此方法来获取正确的值

var val2 = $('.odds .val2')?$('.odds .val2').val():$('.odds').text();