How can I select an element by name with jQuery?

2018-12-31 10:42发布

站内问答 / JavaScript
1088 14 4

Have a table column I'm trying to expand and hide:

jQuery seems to hide the td elements when I select it by class but not by element's name.

For example, why does: 

$(".bold").hide(); // selecting by class works
$("tcol1").hide(); // select by element name does not work

Note the HTML below, the second column has the same name for all rows. How could I create this collection using the name attribute?

<tr>    
    <td>data1</td>
    <td name="tcol1" class="bold"> data2</td>
</tr>
<tr>    
    <td>data1</td>
    <td name="tcol1" class="bold"> data2</td>
</tr>  
<tr>    
    <td>data1</td>
    <td name="tcol1" class="bold"> data2</td>
</tr>

14条回答
何处买醉
2楼-- · 2018-12-31 10:55

Here's a simple solution: $('td[name=tcol1]')

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唯独是你
3楼-- · 2018-12-31 10:57 

function toggleByName() {
  var arrChkBox = document.getElementsByName("chName");
  $(arrChkBox).toggle();
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
  <head>
    <title>sandBox</title>
  </head>
  <body>
    <input type="text" name="chName"/><br />
    <input type="text" name="chName"/><br />
    <input type="text" name="chName"/><br />
    <input type="text" name="chName"/><br />
    <input type="button" onclick="toggleByName();" value="toggle"/>
  </body>
</html>

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忆尘夕之涩
4楼-- · 2018-12-31 10:57

You could get the array of elements by name the old fashioned way and pass that array to jQuery.

function toggleByName() {
  var arrChkBox = document.getElementsByName("chName");
  $(arrChkBox).toggle();
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
  <head>
    <title>sandBox</title>
  </head>
  <body>
    <input type="radio" name="chName"/><br />
    <input type="radio" name="chName"/><br />
    <input type="radio" name="chName"/><br />
    <input type="radio" name="chName"/><br />
    <input type="button" onclick="toggleByName();" value="toggle"/>
  </body>
</html>

note: the only time you would have a reason to use the "name" attribute should be for checkbox or radio inputs.

Or you could just add another class to the elements for selection.(This is what I would do)

function toggleByClass(bolShow) {
  if (bolShow) {
    $(".rowToToggle").show();
  } else {
    $(".rowToToggle").hide();
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
  <head>
    <title>sandBox</title>
  </head>
  <body>
    <table>
      <tr>
        <td>data1</td>
        <td class="bold rowToToggle">data2</td>
      </tr>
      <tr>
        <td>data1</td>
        <td class="bold rowToToggle">data2</td>
      </tr>
      <tr>
        <td>data1</td>
        <td class="bold rowToToggle">data2</td>
      </tr>
    </table>
    <input type="button" onclick="toggleByClass(true);" value="show"/>
    <input type="button" onclick="toggleByClass(false);" value="hide"/>
  </body>
</html>

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有味是清欢
5楼-- · 2018-12-31 10:57

You can get the element in JQuery by using its ID attribute like this:

$("#tcol1").hide();
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无色无味的生活
6楼-- · 2018-12-31 11:00

You can get the name value from an input field using name element in jQuery by:

var firstname = jQuery("#form1 input[name=firstname]").val(); //Returns ABCD
var lastname = jQuery("#form1 input[name=lastname]").val(); //Returns XYZ 
console.log(firstname);
console.log(lastname);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form name="form1" id="form1">
  <input type="text" name="firstname" value="ABCD"/>
  <input type="text" name="lastname" value="XYZ"/>
</form>

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心情的温度
7楼-- · 2018-12-31 11:01

You can use the attribute selector:

$('td[name=tcol1]') // matches exactly 'tcol1'

$('td[name^=tcol]') // matches those that begin with 'tcol'

$('td[name$=tcol]') // matches those that end with 'tcol'

$('td[name*=tcol]') // matches those that contain 'tcol'
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