javascript jQuery .offset() 未定义 var 对象的类`top`
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jQuery .offset() getting undefined for class `top` of var object
提问by Brian
I'm working on the following code, and a bit stumped why I'm getting an error in my debugger. apparently in the line that starts with var skillsLimit = ...the class .topof var skillsOffsetis undefined. Am I setting the var for skillsOffsetincorrectly here?
我正在处理以下代码，并且有点困惑为什么我的调试器出现错误。显然，在以 varvar skillsLimit = ...类开头的行中是未定义的。我在这里错误地设置了 var吗？.topskillsOffsetskillsOffset
// Set Pie graph to position fixed during a specified range
var $window = $(window);
var windowHeight = $(window).height();
var pos = $window.scrollTop(); //position of the scrollbar
var $this = $(this);
$window.bind('scroll', function(){ //when the user is scrolling...
var pos = $window.scrollTop(); //position of the scrollbar
var skillsOffset = $('#skills').offset();
var skillsLimit = $('#skills').skillsOffset.top + $('#skills').outerHeight();
if ( pos > skillsOffset ) {
$('.chartwell-pies').css({ 'position' : 'fixed' });
}
});
回答by Rob Cooper
Remove the $('#skills')from the assignment to skillsLimit, you've already got the object in the line above:
$('#skills')从分配到 中删除skillsLimit，您已经在上面的行中获得了对象：
var pos = $window.scrollTop(); //position of the scrollbar
var skillsOffset = $('#skills').offset();
var skillsLimit = skillsOffset.top + $('#skills').outerHeight();
