English 中文(简体)
A. 找到一个区域内的所有要素
原标题:Finding all elements within a region

如果想找到一个盒子区域内的所有要素,那么作为延伸的最好方式是什么? 如果检查所有休假内容并打电话给BoundingClientRect(),那么,由于页上很容易有500多个休假时间,就太慢了。

任何帮助都将受到赞赏。 感谢。

最佳回答

您可使用<代码>文件>elementFromPoint,并访问第五版(每五种都比访问每张single pixel都快得多),在各种阵列中添加每个已发现的内容:

function getElementsInRegion(x, y, width, height) {

    var elements = [],
        expando = +new Date,
        cx = x,
        cy = y,
        curEl;

    height = y + height;
    width = x + width;

    while ((cy += 5) < height) {
        cx = x;
        while (cx < width) {
            curEl = document.elementFromPoint(cx, cy);
            if ( curEl && !curEl[expando] ) {
                curEl[expando] = new Number(0);
                elements.push(curEl);
                cx += curEl.offsetWidth;
            } else {
                cx += 5;
            }
        }
    }

    return elements;

}
问题回答

暂无回答




相关问题
selected text in iframe

How to get a selected text inside a iframe. I my page i m having a iframe which is editable true. So how can i get the selected text in that iframe.

How to fire event handlers on the link using javascript

I would like to click a link in my page using javascript. I would like to Fire event handlers on the link without navigating. How can this be done? This has to work both in firefox and Internet ...

How to Add script codes before the </body> tag ASP.NET

Heres the problem, In Masterpage, the google analytics code were pasted before the end of body tag. In ASPX page, I need to generate a script (google addItem tracker) using codebehind ClientScript ...

Clipboard access using Javascript - sans Flash?

Is there a reliable way to access the client machine s clipboard using Javascript? I continue to run into permissions issues when attempting to do this. How does Google Docs do this? Do they use ...

javascript debugging question

I have a large javascript which I didn t write but I need to use it and I m slowely going trough it trying to figure out what does it do and how, I m using alert to print out what it does but now I ...

Parsing date like twitter

I ve made a little forum and I want parse the date on newest posts like twitter, you know "posted 40 minutes ago ","posted 1 hour ago"... What s the best way ? Thanx.

热门标签