Jquery中是否有任何事件只在用户点击文本框中的回车按钮时才会触发?或者任何插件,可以添加到包括这个?如果不是,我该如何编写一个快速插件来做到这一点?
当前回答
值得注意的是,live()在jQuery中的使用从1.7版开始就已弃用,并在jQuery 1.9中被移除。相反,建议使用on()。
我强烈建议使用以下绑定方法,因为它解决了以下潜在的挑战:
By binding the event onto document.body and passing $selector as the second argument to on(), elements can be attached, detached, added or removed from the DOM without needing to deal with re-binding or double-binding events. This is because the event is attached to document.body rather than $selector directly, which means $selector can be added, removed and added again and will never load the event bound to it. By calling off() before on(), this script can live either within within the main body of the page, or within the body of an AJAX call, without having to worry about accidentally double-binding events. By wrapping the script within $(function() {...}), this script can again be loaded by either the main body of the page, or within the body of an AJAX call. $(document).ready() does not get fired for AJAX requests, while $(function() {...}) does.
这里有一个例子:
<!DOCTYPE html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
var $selector = $('textarea');
// Prevent double-binding
// (only a potential issue if script is loaded through AJAX)
$(document.body).off('keyup', $selector);
// Bind to keyup events on the $selector.
$(document.body).on('keyup', $selector, function(event) {
if(event.keyCode == 13) { // 13 = Enter Key
alert('enter key pressed.');
}
});
});
</script>
</head>
<body>
</body>
</html>
其他回答
这里有一个插件给你:(小提琴:http://jsfiddle.net/maniator/CjrJ7/)
$.fn.pressEnter = function(fn) {
return this.each(function() {
$(this).bind('enterPress', fn);
$(this).keyup(function(e){
if(e.keyCode == 13)
{
$(this).trigger("enterPress");
}
})
});
};
//use it:
$('textarea').pressEnter(function(){alert('here')})
HTML代码:
<input type="text" name="txt1" id="txt1" onkeypress="return AddKeyPress(event);" />
<input type="button" id="btnclick">
Java脚本代码
function AddKeyPress(e) {
// look for window.event in case event isn't passed in
e = e || window.event;
if (e.keyCode == 13) {
document.getElementById('btnEmail').click();
return false;
}
return true;
}
您的表单没有默认提交按钮
如果你的输入是搜索,你也可以使用on 'search'事件。例子
<input type="search" placeholder="Search" id="searchTextBox">
.
$("#searchPostTextBox").on('search', function () {
alert("search value: "+$(this).val());
});
$('#textbox').on('keypress', function (e) {
if(e.which === 13){
//Disable textbox to prevent multiple submit
$(this).attr("disabled", "disabled");
//Do Stuff, submit, etc..
//Enable the textbox again if needed.
$(this).removeAttr("disabled");
}
});
您可以连接您自己的自定义事件
$('textarea').bind("enterKey",function(e){
//do stuff here
});
$('textarea').keyup(function(e){
if(e.keyCode == 13)
{
$(this).trigger("enterKey");
}
});
http://jsfiddle.net/x7HVQ/
推荐文章
- 使用jQuery以像素为整数填充或边距值
- 检查是否选择了jQuery选项,如果没有选择默认值
- Next.js React应用中没有定义Window
- 如何重置笑话模拟函数调用计数之前,每次测试
- 如何强制一个功能React组件渲染?
- 在javascript中从平面数组构建树数组
- 将Dropzone.js与其他字段集成到现有的HTML表单中
- 如何在AngularJS中观察路由变化?
- JavaScript DOM删除元素
- 将dd-mm-yyyy字符串转换为日期
- Javascript复选框onChange
- Javascript函数前导bang !语法
- 如何在页面上遍历所有DOM元素?
- 使用jQuery滚动到一个div
- 在JS/jQuery中触发按键/按键/按键事件?