Continuing from yesterday, I would like to greet you with an article explaining the background and necessity of HTML.

<center><h1>|Background and necessity of HTML|</h1>
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: HTML 4.01 version, which is currently mainly used, was released in 1999. After 2000, it was merged with XML to create XHTML 1.0. The W3C, which manages standards for the web, strongly promoted XHTML as the next-generation web standard, but due to HTML being already widely used, it was difficult for XHTML to spread despite its many advantages. Apple, Mozila, and Opera jointly launched WHATWG and made efforts to evolve existing HTML.
W3C also participated in this project in 2007, established HTML5, and released a draft in 2008. I think you know that HTML5 is not finalized. Is there no need to learn HTML5, which is not yet complete? As the next-generation web platform, many features of HTML5 can already be used in various browsers, and browsers are also growing (updating) rapidly over time. Accordingly, we must learn HTML5 in order to not miss the trend of evolution/growth.