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  • 2024/7/7 -HTML Validator is a tool that checks HTML documents to ensure they follow the World Wide Web Consortium (W3C) rules. It examines the HTML code for errors helps ...

    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 ...

    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 ...

    2024/9/19 -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.

    2024/9/15 -This free online HTML validator (also known as HTML Linter) allows you to validate HTML code against the W3C standards.

    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,...

    2024/10/1 -The World Wide Web Consortium (W3C) develops standards and guidelines to help everyone build a web based on the principles of accessibility, ...

    Why join W3C-W3C Status-About W3C TPAC-About W3C web standards

    2024/8/26 -This is called client-side form validation, and helps ensure data submitted matches the requirements set forth in the various form controls.

    Sending form data-HTML attribute: pattern-Test your skills-Website security

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

    2024/9/30 -Constraint validation is done through the Constraint Validation API either on a single form element or at the form level, on the <form> element itself. The ...