March 1Mar 1 Administrators CSS Errors CSS Errors Errors in CSS can lead to unexpected behavior or styles not being applied correctly. This page shows common CSS mistakes and how to avoid them. Missing Semicolons Forgetting a semicolon at the end of a property declaration can break the style rule. Example .bad { color: red background-color: yellow; } Try it Yourself » Invalid Property Names Using a property name that does not exist will simply be ignored by the browser. Example .bad { colr: blue; font-size: 16px; } Try it Yourself » Invalid Values Correct properties but invalid values will also be ignored. Example .bad { width: -100px; color: green; } Try it Yourself » Unclosed Braces If you forget to close a brace }, the entire rule may be ignored. Example .bad { padding: 20px; margin: 10px; Try it Yourself » Extra Colons or Braces Typos like extra colons or misplaced braces can cause rules to break. Example .bad { color:: blue; } Try it Yourself » Tips to Avoid CSS Errors Use a code editor with syntax highlighting. Validate your CSS with a CSS linter or validator. Write CSS in small sections and test frequently. ★ +1 Sign in to track progress
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