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  • 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 ...

    2024/9/19 -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 ...

    2024/10/1 -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.

    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,...

    3日前 -Offline HTML5 validator. Validates either a full document or a smaller (incomplete) template, eg from an AngularJS or Vue.js component.

    3日前 -1.10.3 How to catch mistakes when writing HTML: validators and conformance checkers ... With the creation of the W3C, HTML's development changed venue again.

    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 ...

    2024/7/30 -IntelliJ IDEA performs two different validity checks: On-the-fly validation is available for all Web content files and is performed as you edit the file.