jquery / javascript：未捕获的TypeError？(jquery / javascript: Uncaught TypeError?)

jquery / javascript：未捕获的TypeError？(jquery / javascript: Uncaught TypeError?)

嘿伙计们，我写了一个小的自定义动画滚动功能......

function scroll(selector, animate, viewOffset) { pageOffset = selector.offset(); scrollPos = pageOffset.top - viewOffset; if (animate) { $('html, body').animate({scrollTop : scrollPos + 'px'}, { duration: 'slow', // how fast we are animating easing: 'easeOutQuint', // the type of easing complete: function() { } }); } else { $('html, body').scrollTop( scrollPos ); } }

我用scroll($('#something'), false, 30);调用它scroll($('#something'), false, 30);

它实际上是有效的，但有时它有点儿马车，功能不正常工作。 我总是在click事件上调用scroll（）函数。

我遇到的最大问题是在页面加载时我的控制台告诉我以下行。

未捕获的TypeError：无法读取null的属性'top'（script.js第191行，这是我上面示例中的第3行）

知道什么可能导致这个错误吗？ 在dom-ready或on-load上甚至不调用scroll（）函数。 它只是在特定的点击事件上调用。

感谢您的帮助

hey guys, i wrote a little custom animated scroll function...

function scroll(selector, animate, viewOffset) { pageOffset = selector.offset(); scrollPos = pageOffset.top - viewOffset; if (animate) { $('html, body').animate({scrollTop : scrollPos + 'px'}, { duration: 'slow', // how fast we are animating easing: 'easeOutQuint', // the type of easing complete: function() { } }); } else { $('html, body').scrollTop( scrollPos ); } }

I call it with scroll($('#something'), false, 30);

It actually works, however sometimes it's a little bit buggy and the function doesn't properly work. I always call the scroll() function on a click-event.

The biggest problem I have is that on page load my console tells me the following line.

Uncaught TypeError: Cannot read property 'top' of null (script.js line 191 which is line 3 in my example above)

Any idea what could cause this error? the scroll() function is not even called on dom-ready or on-load. It's just called on specific click-events.

thank you for your help

最满意答案

不应该是：

pageOffset = $(selector).offset();

？

Shouldn't it be:

pageOffset = $(selector).offset();

?