jQuery 将焦点设置在按钮上不起作用
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Setting focus on a button is not working
提问by Lamps
I am trying to set the focus to a button while the user presses the Enterkey in the text box. But it is not working. I am using the Internet Explorer 8 browser. Am I missing something?
我试图在用户按下Enter文本框中的键时将焦点设置为按钮。但它不起作用。我使用的是 Internet Explorer 8 浏览器。我错过了什么吗？
$("input.Box").live('keydown', function(e) {
if (e.keyCode == 13) {
e.preventDefault();
$("#button").focus(); // Not working?
}
});
采纳答案by Blender
Microsoft decided that they don't like e.keyCodeand instead have their own syntax, e.which.
微软决定他们不喜欢e.keyCode，而是有自己的语法，e.which.
You have to check for both:
您必须检查两者：
$("input.Box").live('keydown', function(e) {
var keyCode = (window.event) ? e.which : e.keyCode;
if (keyCode == 13)
e.preventDefault();
$("#button").focus(); // Not working?
}
});
回答by Ankit Soni
The problem is that IE is not able to respond quickly enough, so you need to add a small delay between when the livefunction is entered, and when .focus()is called. So, replace
问题是 IE 的响应速度不够快，所以你需要在live函数进入和.focus()调用之间添加一个小的延迟。所以，更换
$("#button").focus();
$("#button").focus();
with
和
setTimeout(function () {
$('#button').focus();
}, 100);
This, in conjunction with using e.whichwith e.keyCodeas Blender suggested should fix your issue.
这e.which与e.keyCodeBlender 建议的with一起使用应该可以解决您的问题。
回答by griegs
Are you sure the name is correct? .NEThas a habit of renaming things. You don't specify the language or environment.
你确定名字正确吗？.NET有重命名事物的习惯。您没有指定语言或环境。
Try to use the class selector. Give the button a class name of class="Test"and then select using $(".Text").focus().
尝试使用类选择器。给按钮一个类名，class="Test"然后选择 using $(".Text").focus()。
回答by Chad
Make sure the DOM is ready, element exists, before attempting to set focus.
在尝试设置焦点之前，请确保 DOM 已准备就绪，元素存在。
