检测由标签键启动的焦点？

本文介绍了检测由标签键启动的焦点？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我想检测一个元素的焦点事件，但只有当用户按Tab键启动它时。例如：I want to detect the focus event of an element, but only if it was initiated by the user pressing the tab key. For example:<input type="text" id="foo" /><input type="text" id="detect" />如果用户专注于 #foo 并按，我想要事件一旦 #detect 变得专注（或焦点事件中的条件为true）即可​​触发。相反，如果用户只需点击 #detect 字段来对焦，我不希望事件触发（或者我想要焦点事件调用中的条件为假）。If the user is focused on #foo and presses , I want the event to fire once #detect becomes focused (or a conditional inside the focus event to be true). Conversely, if the user simply clicks on the #detect field to focus it, I do not want the event to fire (or I want the conditional inside the focus event call to be false).我不想使用 #foo 的keydown事件，并检查tab键是否按下，因为我想要的方法是独立于任何其他元素。I don't want to use the keydown event of #foo and check if the tab key was pressed, as I want the approach to be independent of any other element.我看过以下代码的控制台输出，但是没有注意到两者之间的真正差异聚焦方法：I looked through the console output of the following code, but couldn't notice any real differences between the two methods of focusing:$('#detect').on('focus', function(e){ console.log(e);});（小提琴）(fiddle)这是否可以以相对简单的方式完成？Is this possible to accomplish in a relatively simple way?推荐答案我知道您已经接受了一个答案，但您可以使用以下内容测试按下的按钮：I know you have accepted an answer but you could test the button pressed using the following:$('#detect').on('focus', function(e){ $(window).keyup(function (e) { var code = (e.keyCode ? e.keyCode : e.which); if (code == 9) { alert('I was tabbed!'); } });}); http： //jsfiddle.net/LPGLm/1/ 修改：更改收听者：$(window).keyup(function (e) { var code = (e.keyCode ? e.keyCode : e.which); if (code == 9 && $('#detect:focus').length) { alert('I was tabbed!'); }}); http： //jsfiddle.net/LPGLm/7/ 这篇关于检测由标签键启动的焦点？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！