使用jQuery检测元素溢出
问题描述：
CSS:
.blue
{
width:200px;
height:200px;
background-color:blue;
color:#000000;
overflow:auto;
}
JavaScript:
JavaScript:
function addChar() {
$('.blue').append('some text ');
}
HTML:
<div id='blue1' class="blue"></div><br />
<a href='javascript:void(0)' onclick='addChar()'>Add</a>
div id='blue1'的overflow属性设置为auto.我想在发生溢出时进行检测.
div id='blue1' has overflow property set to auto. I want to detect overflow when it happens.
答
$.fn.HasScrollBar = function() {
//note: clientHeight= height of holder
//scrollHeight= we have content till this height
var _elm = $(this)[0];
var _hasScrollBar = false;
if ((_elm.clientHeight < _elm.scrollHeight) || (_elm.clientWidth < _elm.scrollWidth)) {
_hasScrollBar = true;
}
return _hasScrollBar;
}
///这是我的解决方法
/// this is my solution