Mousdown为何不起作用 <html> -标签？

Question

The mousedown-event only works if I click an elemnt, not the html-element. 仅当我单击一个元素而不是html元素时，mousedown事件才起作用。 Why and What can I do about it? 为什么以及我该怎么办？

var curFocus;
$(document.body).delegate('*','mousedown', function(){
    if ((this != curFocus) && // don't bother if this was the previous active element                
        ($(curFocus).is('.field'))  // if it was a .field that was blurred
    ) {
        $('.' + $(curFocus).attr("id")).removeClass("visible"); // take action based on the blurred element
    }

    curFocus = this; // log the newly focussed element for the next event
});

Answer 1

<html>标记有点笼统，它包含不可见的元素，例如<head> ，请尝试使用<body>标记。

Answer 2

The <body> element is inside the <html> element, not the other way around. <body>元素位于<html>元素内部，而不是相反。 And your code will only respond to mouse-down events coming from children of the body element, not even the <body> element itself. 而且您的代码将仅响应来自body元素子元素的鼠标按下事件，甚至不响应<body>元素本身。 See http://jsfiddle.net/5T8tW/ for a demo. 有关演示，请参见http://jsfiddle.net/5T8tW/ 。

To make the code respond to such events, change $(document.body) to $(document) . 要使代码响应此类事件，请将$(document.body)更改为$(document) 。 If you don't want to respond to events coming from the <html> element but only its children, you could use $(document.documentElement) , which is the <html> element. 如果您不想响应来自<html>元素的事件，而仅响应其子元素，则可以使用$(document.documentElement) ，它是<html>元素。 Note that as the event bubbles up through the DOM tree, your event handler may be fired more than once; 请注意，随着事件在DOM树中冒泡，您的事件处理程序可能会被触发多次； use return false; 使用return false; at the end to prevent that. 最后防止这种情况。

Mousdown为何不起作用 <html> -标签？

问题描述

2 个解决方案

解决方案1
3 已采纳 2010-11-17 22:22:57

解决方案2
2 2010-11-17 22:30:20

Mousdown为何不起作用 <html> -标签？

问题描述

2 个解决方案

解决方案1 3 已采纳 2010-11-17 22:22:57

解决方案2 2 2010-11-17 22:30:20

解决方案1
3 已采纳 2010-11-17 22:22:57

解决方案2
2 2010-11-17 22:30:20