用jquery改变background-color td

how to change background-color td with jquery ?

如何用jquery更改背景颜色td?

I need to change the background-color column one in row two and three and four

我需要在第二行,第三行和第四行更改背景颜色列

my table :

我的桌子:

<table class="myTable">
    <thead>
        <tr>
            <th>Col 1</th>
            <th>Col 2</th>
            <th>Col 3</th>
            <th>Col 4</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
                <tr>
            <td >td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
                <tr>
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
           <tr>
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
           <tr>
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
    </tbody>
</table>

demo : jsfiddle

演示:jsfiddle

How to do it with jQuery?

如何用jQuery做到这一点?

6 个解决方案

#1

You can use the nth selector in jQuery:

你可以在jQuery中使用第n个选择器:

http://api.jquery.com/nth-child-selector/

$( "table tr:nth-child(2) td:nth-child(1)" ).css("background-color", "blue");
$( "table tr:nth-child(3) td:nth-child(1)" ).css("background-color", "blue");
$( "table tr:nth-child(4) td:nth-child(1)" ).css("background-color", "blue");
$( "table tr:nth-child(5) td:nth-child(1)" ).css("background-color", "blue");

jsFiddle

#2

$('.myTable tbody tr:lt(4):gt(0)')
         .children('td:first-child').css('background-color', 'lightblue');

FIDDLE

This gets the tr with index between 0 and 4 => 1,2,3

这将得到索引在0到4 => 1,2,3之间的tr

tr:lt(4):gt(0)

#3

I found:

$('table.myTable tr:gt(1):lt(3)').find('td:first').css('background-color', 'red');

$('table.myTable tr:gt(1):lt(3)')。find('td:first')。css('background-color','red');

demo : jsfiddle

演示:jsfiddle

#4

I would add a class to the tds you are concerned with. A good name for the class would be something that describes why you are highlighting. Then you could just add a statement in css that will handle that. Or if you want to change the color via jquery you could do the following.

我会为你关心的tds添加一个类。这个类的好名字将描述你为什么要突出显示。然后你可以在css中添加一个将处理它的语句。或者,如果您想通过jquery更改颜色,可以执行以下操作。

//Assuming highlighter is your added class name and red is the color you want to change to. 
$('td.highlighter').css('background-color', 'red');

Your html for tr would look like this

你的html for tr看起来像这样

<tr>
  <td class='highlighter'>td1</td>
  <td>td2</td>
  <td>td3</td>
  <td>td4</td>
</tr>

#5

If would use this code :

如果要使用此代码:

$('.myTable tbody tr').filter(function(i){
    return {1 : true, 2 : true, 3 : true}[i];
}).children(':first-child').css('background-color', 'red');

But of course, it would be easier to use class.

但是,当然,使用课程会更容易。

Fiddle

#6

I don't suggest using jQuery for this kind of styling because it can be a performance issue when ran and if the user has JavaScript disabled, it won't render properly.

我不建议将jQuery用于这种样式,因为它在运行时可能是性能问题,如果用户禁用了JavaScript,它将无法正常呈现。

What I suggest is using actual CSS to accomplish this task. If it's absolutely necessary to use JS for it, then adding and removing a class from an element would probably be better.

我建议使用实际的CSS来完成这项任务。如果绝对有必要使用JS,那么从元素中添加和删除类可能会更好。

Find an example of what I'm talking about below. http://jsfiddle.net/F7hnL/

找一个我正在谈论的内容的例子。 http://jsfiddle.net/F7hnL/

CSS

.myTable tr.highlight td:first-child {
    background-color : red;
}

HTML

<table class="myTable">
    <thead>
        <tr>
            <th>Col 1</th>
            <th>Col 2</th>
            <th>Col 3</th>
            <th>Col 4</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
        <tr class="highlight">
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
        <tr class="highlight">
                <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
           <tr class="highlight">
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
           <tr>
            <td>td1</td>
              <td>td2</td>
              <td>td3</td>
              <td>td4</td>
        </tr>
    </tbody>
</table>