Node.previousSibling - Web APIs 编辑

The Node.previousSibling read-only property returns the node immediately preceding the specified one in its parent's childNodes list, or null if the specified node is the first in that list.

Syntax

previousNode = node.previousSibling;

Example

<img id="b0">
<img id="b1">
<img id="b2">

console.log(document.getElementById("b1").previousSibling); // <img id="b0">
console.log(document.getElementById("b2").previousSibling.id); // "b1"

Notes

Gecko-based browsers insert text nodes into a document to represent whitespace in the source markup. Therefore a node obtained, for example, using Node.firstChild or Node.previousSibling may refer to a whitespace text node rather than the actual element the author intended to get.

See Whitespace in the DOM and W3C DOM 3 FAQ: Why are some Text nodes empty? for more information.

To navigate the opposite way through the child nodes list use Node.nextSibling.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Node.nextSibling