$.fn.hasOverflow = function() { var $this = $(this); var $children = $this.find(‘*’); var len = $children.length;
if (len) {
var maxWidth = 0;
var maxHeight = 0
$children.map(function(){
maxWidth = Math.max(maxWidth, $(this).outerWidth(true));
maxHeight = Math.max(maxHeight, $(this).outerHeight(true));
});
return maxWidth > $this.width() || maxHeight > $this.height();
}
return false;
};
例：
var $content = $('#content').children().wrapAll('<div>');
while($content.hasOverflow()){
var size = parseFloat($content.css('font-size'), 10);
size -= 1;
$content.css('font-size', size + 'px');
}
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