WebW3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, … WebMar 12, 2024 · Active learning: Validating an HTML document. Let's try this with our sample document. First, load the Markup Validation Service in one browser tab, if it isn't already open. Switch to the Validate by Direct Input tab. Copy all of the sample document's code (not just the body) and paste it into the large text area shown in the Markup Validation ...
The W3C Markup Validation Service
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12 Common CSS Mistakes Web Developers Make - WebFX
WebApr 5, 2024 · Mistake #4: Ignoring cAsE sEnSiTiViTy. If you are using Windows for your development environment, you might not notice a problem when you inconsistently use lowercase and capital letters. This is a mistake. Let's say you created a CSS folder named "Css" and a file within it named "Main.css". WebNov 18, 2024 · Google Webmaster Tools - A must for any Webmaster. With this free service, you can identify any page or links with errors, scan for malware, find pages with short or missing titles, find duplicate meta tags, and more. It should be noted that you need a Google account to use these tools. Nibbler - A fantastic free online service that gives … WebHow it works. the tool crawls the "root" URL you provide. it extracts stylesheets found in all linked CSS files and inline styles. parses the page to find unused selectors. parses the page to find all internal links and … solar panel with fan