How can one select specific sibling of a context node using jQuery?

How can one select a specific sibling of a context node using jQuery? Specifically, gi开发者_StackOverflowven context node myContextNode select the sibling span with class myClass.

document.evaluate("../span[@class='myClass']",
    myContextNode, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).
    singleNodeValue;

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You can use .siblings() with a selector, like this:

$(myContextNode).siblings("span.myClass")