实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
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<!DOCTYPE html>
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<html>
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<body>
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​
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<p>This is some text.</p>
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​
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<div style="color:#0000FF">
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  <h3>This is a heading in a div element</h3>
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  <p>This is some text in a div element.</p>
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</div>
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​
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<p>This is some text.</p>
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​
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</body>
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</html>