Help:Lint errors/obsolete-tag/ja

廃止されたタグエラーは、非推奨のHTML要素によるものです.

HTML5準拠の目標をどこまで推進したいかは現時点では不明であるため、このカテゴリは優先度が低いとマークされています. 一部のウィキは、すぐに対処しないことを選択する場合があります. その他のウィキは先に進み、HTML5に準拠したいと思うかもしれません. 一部のウィキは、これに対処するためにボットを作成するかもしれません. したがって、あなたの判断とwiki固有の方針を使用して、これにどれだけの労力を費やしたいかを案内してください. 将来、この修正をより積極的に追求することがより明確になった場合は、このリンターの問題の重大度を適切に更新することで、それを反映します.

非推奨の要素
現在、非推奨の要素と代替要素は次のとおりです.

理論的根拠
MediaWiki currently whitelists these elements, and they tend to be output the same way as input. This means that when browser vendors decide to remove these they will simply display as regular undecorated text. Examples of some "popular" html tags that had visual effects and have been removed from major browsers include and. A further problem is that different browser vendors may remove them independently so editors or readers may have inconsistent views of the same page, leading to confusion.

It is likely that browser vendors will give us significant notice before making any breaking changes given how prevalent these deprecated elements are used across the internet.

Helpful hints
accepts numeric font colors without the standard pound sign prefix. However, with, the pound sign before numeric font colors is mandatory:

accepts some nonstandard font color names such as burntorange and vermillion, which are not on the list of 16 HTML colors or the list of 124 X11 colors. The replacement  markup recognizes only color names on these lists.

accepts 4-digit and 5-digit hexadecimal codes, which need 00 and 0, respectively, appended in  markup. Hexadecimal codes with more than 6 digits need to be trimmed to the first 6 digits.

Tools
The following tools can help fix obsolete HTML tags:

Obsolete tags may be reported by WPCleaner as part of CheckWiki error #541.
 * WPCleaner: see instructions on how to use WPCleaner for fixing errors detected by Linter.