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<p>我正在学习JavaScript编程技术</p>
<p>我正在学习<strong style="color: red;">JavaScript</strong>编程技术</p>
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console.log(p.innerHTML); //innerHTML可以输出标签
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//textContent 仅获取纯文本
console.log(p.textContent);
console.log(p1.textContent);
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//nodeValue 节点值
if(p.childNodes[0].nodeType == 3){
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