检测输入某个类的输入元素 [英] Detect enter in input elements of a certain class

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问题描述



我需要检测什么时候有人点击输入文本输入。

我的jQuery如下:

  $('input.large')。keypress(function(e){
if(e.which == 13)
console .log(pressed enter);
});

我的HTML是这样的:

 < tr>< td>个人名称< / td>< / tr> 
< tr>< td> < input type ='text'class ='large'> < / td>< / tr>

< tr>< td>电子邮件< / td>< / tr>
< tr>< td> < input type ='text'class ='large'> < / td>< / tr>

当我给出字段ID并尝试 $ ').keypress 它工作。但这不工作。我没有控制台输出。

解决方案

您可以使用live( on())事件在文档 keydown (我想更好)。



HTML

 < strong>个人名称< / strong> 
< input type ='text'class ='large'/>< br />

< strong>电子邮件< / strong>
< input type ='text'class ='large'/>

JS (runnable with jQuery 1.7+):

  jQuery(document).on('keydown','input.large',function(ev){
if(ev.which === 13){
//会将backgroundColor改为蓝色,例如
this.style.backgroundColor ='#EFF';

//避免form submit
return false;
}
});

jsFiddle http://jsfiddle.net/qvhWD/


I need to detect when someone hits "enter" in text inputs with a specific class.

My jQuery is as follows:

$('input.large').keypress(function (e) {
    if(e.which ==13)
        console.log("pressed enter");
});

My HTML is something like this:

<tr><td> Personal Name </td></tr>
<tr><td> <input type='text' class='large'> </td></tr>

<tr><td> Email</td></tr>
<tr><td> <input type='text' class='large'> </td></tr>

When I've given the fields IDs and tried $('#elementid').keypress it worked. But this isn't working. I get no console output. What am I missing?

解决方案

You can use live (.on()) events in document with keydown (I think better). It'll allow you detect keydown in current and future elements that matches with a selector.

HTML:

<strong>Personal Name</strong>
<input type='text' class='large' /><br />

<strong>Email</strong>
<input type='text' class='large' />
​

JS (runnable with jQuery 1.7+):

jQuery(document).on('keydown', 'input.large', function(ev) {
    if(ev.which === 13) {
        // Will change backgroundColor to blue as example
        this.style.backgroundColor = '#EFF';

        // Avoid form submit
        return false;
    }
});​

jsFiddle: http://jsfiddle.net/qvhWD/

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