OnlineCBT
1. Core HTML Best Practices Checklist
- Always declare
: Forces the browser into modern standards-compliant rendering mode rather than Quirks mode. - Always include the
langattribute: e.g.,or. Screen readers and translation tools depend on this. - Always close all tags properly: While modern browsers attempt auto-correction, unclosed tags create unpredictable layout and DOM tree bugs.
- Use lowercase for all tag names and attributes: Consistent convention: rather than.
- Quote all attribute values: Always wrap attribute values in double quotes:
href="https://...".- Separate structure, presentation, and behavior: Never write styling in HTML; maintain external CSS and JavaScript files.
📝 Live Lesson Practice
HTML/CSS JavaScript Python C++ C PHP💻 Code Editor (Monaco VS Code Engine)👀 Live Preview - Quote all attribute values: Always wrap attribute values in double quotes:
