从兄弟元素中寻找文本

Question

I have dynamically generated HTML table that I want to use with JQuery. It looks kind of like this, only with more <tr> elements.

<table>
  <tr>
    <td class="name"> Apples </td>
    <td class="value"> 2.33 </td>
    <td class="amount"> <input type="text"></td>
  </tr>
</table>

The script I'm writing would take whatever's in the text input field, multiply it by the float specified in the value td and output it. However, I have problems getting to that <td> using JQuery.

I tried something like

parseFloat($(".amount input").parent().siblings($("td.value")).text())

to get the value, but it doesn't work - it seems to be trying to multiply it by every element regardless of the class. I tried a <tr> where the only data was integers...

2013-8-28 | 2.1 | 20

...and it spat out 4026. I have no idea why.

So, the question remains: how do I get the contents of the <td> with the class value starting from the input on the same <tr> ?

Answer 1

Try this:

$(document).ready(function(){
    $('input').on('blur', function(){
       alert($(this).val() * $(this).parent().siblings('.value').text()); 
    });
})

Answer 2

怎么样

$(".amount").parent().find('.value').text();

Answer 3

try

HTML

<table>
  <tr>
    <td id="val1" class="name"> Apples </td>
    <td id="val2" class="value"> 2.33 </td>
    <td class="amount"> <input type="text"></td>
  </tr>
</table>

JavaScript

function getvalue()
{
  var name = (document.getElementById('val1').innerText || document.getElementById('val1').textContent);

  var value = parseFloat(document.getElementById('val2').innerText || document.getElementById('val1').textContent);   
}

Answer 4

you can try

$('.amount').each(function(){
    var $this = $(this), amount = parseFloat($this.find('input').val()) || 0, rate = parseFloat($this.prev().text()) || 0;
    console.log(amount * rate)
})

Answer 5

Change

.siblings($("td.value"))

to

.siblings('td.value')

DEMO

Answer 6

This should also work

$('input').on('blur', function(){
   alert($(this).val() * $(this).parent().siblings('.value').text()); 
});

Working fiddle here

Answer 7

The selector in your siblings() function is wrong. Try this:

parseFloat($(".amount input").parent().siblings(".value").text())

Example fiddle

Answer 8

Use :

$('input').on('blur', function(){
   var value = $(this).closest("tr").siblings(".value").text(); 
});

Answer 9

There are many options to do :

$(".amount input").parent().prev("td.value").text() //good to use

or

$(".amount input").parent().siblings("td.value").text()

or

$(".amount input").parent().parent().find("td.value").text()

Full working demo

FIDDLE DEMO

Answer 10

I have done with keyup event you can however you want , FIDDLE

    jQuery(function(){
        $('.amount input').keyup(function(){
            var input_value = this.value;
            var values = $(this).parent().prev().text();
            alert(input_value * values);
        })
    })