blocks|key|2359247|text|尝试如下:将change事件侦听器绑定到rate和box输入框中，并在其内部乘以将其放入amount输入中的值。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2359248|$('#rate,+#box').change(function(){
++++var+rate+=+parseFloat($('#rate').val())+%7C%7C+0;
++++var+box+=+parseFloat($('#box').val())+%7C%7C+0;

++++$('#amount').val(rate+*+box);++++
});|code-block|syntax|javascript|2359249|演示|2359250|输入其他字段后，可以使用keyup事件计算amount|2359251|$('#rate,+#box').keyup(function(){
++++var+rate+=+parseFloat($('#rate').val())+%7C%7C+0;
++++var+box+=+parseFloat($('#box').val())+%7C%7C+0;

++++$('#amount').val(rate+*+box);++++
});|2359252|2359253|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/2L95x1u9/|1|http://jsfiddle.net/2L95x1u9/1/^0|6|6|K|4|P|3|18|6|0|0|0|2|0|0|C|5|L|6|0|0|0|2|1|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|C]|$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1B|8|@]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|M|3|N|5|6|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|O|3|P|5|H|7|1K|8|@]|D|@]|E|$I|J]]|$1|Q|3|L|5|6|7|1L|8|@]|D|@$9|1M|A|1N|1|1O]]|E|$]]|$1|R|3|-4|5|6|7|1P|8|@]|D|@]|E|$]]]|S|$T|$5|U|V|W|E|$X|Y]]|Z|$5|U|V|W|E|$X|10]]]]

<p>Try this : bind <code>change</code> event listener for <code>rate</code> and <code>box</code> input box and inside it multiply the values to put it in <code>amount</code> input.</p>

<pre><code>$('#rate, #box').change(function(){
    var rate = parseFloat($('#rate').val()) || 0;
    var box = parseFloat($('#box').val()) || 0;

    $('#amount').val(rate * box);    
});
</code></pre>

<p><strong><a href="http://jsfiddle.net/2L95x1u9/" rel="noreferrer">DEMO</a></strong></p>

<p>You can use <code>keyup</code> event to calculate <code>amount</code> as soon as you enter other fields</p>

<pre><code>$('#rate, #box').keyup(function(){
    var rate = parseFloat($('#rate').val()) || 0;
    var box = parseFloat($('#box').val()) || 0;

    $('#amount').val(rate * box);    
});
</code></pre>

<p><strong><a href="http://jsfiddle.net/2L95x1u9/1/" rel="noreferrer">DEMO</a></strong></p>


blocks|key|1021189|text|尝试如下:绑定input事件侦听器、on速率和框输入框，并在其内部乘以值，将其放入金额输入中。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1021190|只有当输入的值发生变化时，input事件才会触发，而change只在字段失去焦点时触发。立即输入火|1021191|​|1021192|$('#rate,+#box').on('input',function(){
++++var+rate+=+parseFloat($('#rate').val())+%7C%7C+0;
++++var+box+=+parseFloat($('#box').val())+%7C%7C+0;

++++$('#amount').val(rate+*+box);++++
});|code-block|syntax|javascript|1021193|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<input+type="number"+name="rate"+id="rate"+value=""/>
<input+type="number"+name="box"+id="box"+value=""/>
<input+type="number"+name="amount"+id="amount"+readonly+/>|1021194|1021195|entityMap^0|7|5|I|2|0|D|5|Q|6|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|13|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|14|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|L|7|15|8|@]|D|@]|E|$M|N]]|$1|Q|3|I|5|6|7|16|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|S|$]]

<p>Try this : bind <code>input</code> event listener <code>on</code> rate and box input box and inside it multiply the values to put it in amount input.</p>

<p>The <code>input</code> event only fires when the value of the input has changed whereas <code>change</code> only fires once the field has lost focus. input fires immediately</p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>$('#rate, #box').on('input',function(){
    var rate = parseFloat($('#rate').val()) || 0;
    var box = parseFloat($('#box').val()) || 0;

    $('#amount').val(rate * box);    
});</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;input type="number" name="rate" id="rate" value=""/&gt;
&lt;input type="number" name="box" id="box" value=""/&gt;
&lt;input type="number" name="amount" id="amount" readonly /&gt;</code></pre>
</div>
</div>
</p>


blocks|key|2359307|text|以下是我对上述场景的2美分-+http://jsfiddle.net/ak9ejpne/3/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2359308|我的目标是保持代码的简洁和一些MVC风格。|2359309|function+Operand(a,b){
++this.a+=+parseInt(a);
++this.b+=+b;
++this.c+=+(this.a)*(this.b);

++this.set+=+function(key,edit){
++++this[key]+=+edit;
++++this.c+=+(this.a)*(this.b);++
++};
++return+this;
}|code-block|syntax|javascript|2359310|请让我知道这是否对您有用:)|2359311|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/ak9ejpne/3/^0|F|V|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

<p>Here is my 2 cents on the above scenario -
<a href="http://jsfiddle.net/ak9ejpne/3/" rel="nofollow">http://jsfiddle.net/ak9ejpne/3/</a></p>

<p>My aim was to keep the code thin &amp; clean and with some MVC flavor.</p>

<pre><code>function Operand(a,b){
  this.a = parseInt(a);
  this.b = b;
  this.c = (this.a)*(this.b);

  this.set = function(key,edit){
    this[key] = edit;
    this.c = (this.a)*(this.b);  
  };
  return this;
}
</code></pre>

<p>Do let me know if it is a useful approach for you :)</p>


blocks|key|2359331|text|你可以试试。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2359332|<script+type="text/javascript">+
++++$("#txtOne,#txtTwo").on("change+keyup",+function(e){++
++++++var+txtOne+=+parseFloat($("#txtOne").val());+
++++++var+txtTwo+=+parseFloat($("#txtTwo").val());+
++++++var+result+=+txtOne+*+txtTwo+;+
++++++if+(!isNaN(result))+{+
++++++++++$("#txtAmount").val(result);+
+++++++}++
++++});+
+</script>|code-block|syntax|javascript|2359333|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<h1>You can Try It.</h1> 

<pre><code>&lt;script type="text/javascript"&gt; 
    $("#txtOne,#txtTwo").on("change keyup", function(e){  
      var txtOne = parseFloat($("#txtOne").val()); 
      var txtTwo = parseFloat($("#txtTwo").val()); 
      var result = txtOne * txtTwo ; 
      if (!isNaN(result)) { 
          $("#txtAmount").val(result); 
       }  
    }); 
 &lt;/script&gt;
</code></pre>


<p>I need to Multiply two user Input Fields and show the results in the third field. The Result field must change when either of the User Input fields are changed.</p>

<pre><code>&lt;input type="number" name="rate" id="rate" /&gt;
&lt;input type="number" name="box" id="box" /&gt;
</code></pre>

<p>The result should be in a third field which changes when either of the two above fields is changed. This totally depends on the user input</p>

<pre><code>&lt;input type="number" name="amount" id="amount" readonly /&gt;
</code></pre>

<p>I need to do this Multiplication with Jquery.</p>

<p>Thanks in advance</p>


Multiply two input field and result in the third field which changes when either of the input field changed with jQuery

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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我需要乘两个用户输入字段，并在第三个字段中显示结果。当任何一个用户输入字段被更改时，结果字段必须更改。<input type="number" name="rate" id="rate" /><input type="number" name="box" id="box" />结果应该在第三个字段中，当上述两个字段中的...

问将两个输入字段相乘，导致第三个字段随jQuery的变化而变化。
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问将两个输入字段相乘，导致第三个字段随jQuery的变化而变化。EN