Facing the Past and Future of HTML5

This section gives you a few tips to learn how to live with the phenomenon of old and new versions of HTML5.

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By now, you have learned about HTML5 and had to think of older HTML versions only tangentially.

In real life, you often meet old HTML dialects, including XHTML and other old HTML versions.

However, they are very close to HTML5 you learned in this book, but they may use HTML elements and attributes you do not know yet. On the other hand, HTML5 defines new elements that are not supported by all browsers, or not fully, but partially.

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