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  • 2024/2/2 -W3C Validator for client side rendering pages. A tool for validating the currently rendered html with the Markup Validation Service provided by the W3C.

    2024/9/19 -Using the W3C validator can improve your site's overall performance. It enables you to avoid code bloat, resolve accessibility issues, and fix common errors.

    2024/8/15 -Checks websites are accessible, use valid HTML, ARIA and CSS, have no broken links, and are free from spelling mistakes. Test single pages through to multiple ...

    2024/8/12 -w3c-html-validator takes HTML files and returns detailed validation results. The reporter produces formatted output indented for use in build scripts and test ...

    2023/11/24 -The latest development code for the CSS Validator is available through the GitHub repository. For a visual representation, see the CSS Validator Sequence ...

    A.私は天下のヤフー様のとあるサイトを担当させていただいていました。 厳密にHTML文法を守って書くのもありますが、その前に、 「全ての環境で同じように表示される」ことを前提においていますので、...

    A.1個目は 「httpヘッダのcharsetが"shift-jis"だけどhtmlの方は"shift_jis"になってるよ。httpヘッダの方を信じるから...

    A.W3C は質問主さんのソースのような記法を認めています。 確かに腑に落ちない警告ですね。 https://momdo.github.io/html5/sections.html#the-h1,...

    2023/11/18 -W3C validation ensures clean, compatible CSS code. Discrepancies in validators arise from interpretation nuances. For the “shape-outside” error, confirm the ...

    2024/2/8 -The HTML Validator by Tiiny Host is an easy & simple way to validate, troubleshoot, and ensure your HTML meets the w3c standard.

    2024/2/2 -The W3C CSS Validation Service, also known as CSS validator, is a popular free online service to find problems in CSS style sheets used by your HTML pages. The ...

    2024/5/17 -Features · Zero-configuration required · Helps reduce hydration errors · Detects common accessibility mistakes. Read more. Quick setup. Add ...