以下实例显示了 XPathExpression 接口的用法。

<div>XPath 实例</div>

<div>&lt;div&gt; 的数量：<output></output></div>

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<script>

var xpath = "//div";

var evaluator = new XPathEvaluator();

var expression = evaluator.createExpression("//div");

var result = expression.evaluate(document, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE);

document.querySelector("output").textContent = result.snapshotLength;

</script>

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