NodeList.item() - Web APIs 编辑

Returns a node from a NodeList by index. This method doesn't throw exceptions as long as you provide arguments. A value of null is returned if the index is out of range, and a TypeError is thrown if no argument is provided.

Syntax

nodeItem = nodeList.item(index)
  • nodeList is a NodeList. This is usually obtained from another DOM property or method, such as childNodes.
  • index is the index of the node to be fetched. The index is zero-based.
  • nodeItem is the indexth node in the nodeList returned by the item method.

Alternate Syntax

JavaScript also offers an array-like bracketed syntax for obtaining an item from a NodeList by index:

nodeItem = nodeList[index]

Example

var tables = document.getElementsByTagName("table");
var firstTable = tables.item(1); // or tables[1] - returns the second table in the DOM

Specifications

SpecificationStatusComment
DOM
The definition of 'NodeList: item' in that specification.
Living Standard

Browser compatibility

BCD tables only load in the browser

如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论, 你可以免费 注册 一个本站的账号。
列表为空,暂无数据

词条统计

浏览:74 次

字数:2311

最后编辑:7年前

编辑次数:0 次

    我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站,即表示您同意使用 Cookies 和您的相关数据。
    原文