请看这个小提琴：http: //jsfiddle.net/ZWw3Z/5/

我的代码是：

p {
    position: relative;
    background-color: blue;
}

p:before {
    content: '';
    position: absolute;
    left:100%;
    width: 10px;
    height: 100%;
    background-color: red;
}


    <p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate...</p>

我想仅在伪元素（红色位）上触发点击事件。也就是说，我不希望在蓝色位上触发点击事件。