XPath 在 JQuery 选择器中不起作用（JQuery 版本 1.7.1）

Question

Below is a jQuery selector that works, and the value is set correctly into the text box. Why doesn't the XPath code within the jQuery selector work? I thought jQuery supported XPath.

jQuery code working:

$('html > body > form > div:nth-child(4) > label > input').val('hello world');

jQuery code not working:

$('/html/body/form/div[4]/label/input[1]').val('hello world');

Documentation here:

http://docs.jquery.com/DOM/Traversing/Selectors

... search for this code in the documentation above.... $("/html/body//p")

Answer 1

jQuery does not support XPath syntax for selectors out of the box anymore.

If you look at that documentation you link to, you'll see it's for version 1.1.2 , something from more than 5 years ago. It also says, in a great big red box with centered text :

This is an old version of the Selectors API:

View the Current API

Answer 2

When the Xpath selectors were removed ( in JQuery 1.2 ) the functionality was moved to a plugin, http://archive.plugins.jquery.com/project/xpath