§ SUMMARY "The process of checking that the code is in compliance with the standards and recommendations set by the World Wide Web Consortium (W3C) for the web". Implementation example: "When opening a document in Code view, %appname% automatically validates that the document is not using any tags, attributes, CSS properties, or CSS values that are not available in the target browsers that the user selected. %appname% underlines errors (...)". About Code validation — https://helpx.adobe.com/dreamweaver/extend/code-validation.html § STEPS TO REPRODUCE 1. Right-click on any panel and select "Configure Toolbars" 2. Enter the word "validat" or "linting" in the Filter field of the Available actions block § OBSERVED RESULT The list of suggested functions is empty. § EXPECTED RESULT I expect Kate to include HTML/CSS code checking at the level of applications such as Dreamweaver, oXygenXML Editor, Bluefish, SeaMonkey Composer, Codelobster, CoffeeCup HTML Editor, HTML-Kit, TOWeb, Arachnophilia, EZGenerator or Bootstrap Studio. § SOFTWARE/OS VERSIONS Windows: 10.0.19045.4474 KDE Frameworks Version: 6.3.0 Qt Version: 6.71 (built against 6.7.1)
We have htmltidy integeration in the project plugin. See the screenshot. Alternatively use a language server for html or css. It will provide you with a lot of functionality in addition to validation.
Created attachment 172203 [details] htmltidy
See https://www.npmjs.com/package/@bmewburn/vscode-html-languageserver and our LSP plugin which integerates with the server