Index Symbols | A | B | C | D | E | F | G | H | I | J | L | M | N | O | P | Q | R | S | T | U | V | W | X | Z Symbols 8-bit A absolute positioning absolute units absolute URL accessibility adaptive icons alpha channel alpha transparency alternative text ancestors anchor ARIA roles aspect ratio attached background image attribute attribute selector attributes author style sheet B background canvas background painting area bitmapped image Boolean attribute border border-box model box model browser preloader C cascade Cascading Style Sheets CERN character encoding character entity reference character set checkbox buttons child class selector clearing client client-side clipping coded character set collapsing margins color stop color table (also color map) containing block content content area content-box model contextual selector Creative Commons License CSS CSS pixel CSS shapes D declaration declaration block definition list descendants device-independent pixel (DP) device-pixel-ratio disk cache display types DNS server document body document head Document Object Model document outline document type declaration (DOCTYPE) DOM domain name Domain Name System server DRY (Don’t Repeat Yourself) E element element type selector em empty element escaped character explicitly associated labels external link F favicon filter primitive firewall fixed positioning float containment floating font foreground (of an element) form accessibility form controls fragment fragment identifier G gamma generated content GIF (Graphic Interchange Format) global attributes graceful degradation grouped selector grouped selectors H hexadecimal high-density display HSL color model (Hue Saturation Luminosity) HSLa HTML HTTP HTTP header HTTPS HyperText Markup Language HyperText Transfer Protocol HyperText Transfer Protocol Secure I id selector implicitly associated labels index file indexed color inheritance (in CSS) inline style inline SVG inner edge internet intranet IP address J JavaScript JPEG (Joint Photographic Experts Group) L linear gradient lossless compression lossy compression M m-dot site mailto link margin markup masking media condition media queries metadata MIME type monospace font N named character entity NCSA nesting non-replaced elements numeric character entity O open source ordered list origin image outer edge outline P padding palette parent pathname performance pixel pixel density PNG (Portable Network Graphics) PNG-24 PNG-8 point (PT) ppi presentation (also presentation layer) progressive enhancement property protocol pseudo-class selector pseudo-element selector Q quantization R radial gradient radio buttons reference pixel (CSS pixels) relative link relative positioning relative units relative URL rem rendering engine replaced element replaced elements resolution (ppi) responsive web design RGB color model RGBa rights-managed images root directory root element royalty-free images rule order S screen designer Section 508 selector semantic markup server server-side server-side detection siblings source document specificity SSL standalone SVG static positioning sticky positioning structured data style rule SVG (Scalable Vector Graphics) SVG sprite syntax T tag tags TCP text-level semantic elements TLS typeface U Unicode Uniform Resource Locator universal selector unordered list URL user agent user agent style sheet user coordinate system user style sheet V valid HTML validator tools value (form) variable vector image vendor prefix viewbox viewport (SVG) viewport coordinate system visible element box W w-descriptor W3C WAI waterfall chart web Web Accessibility Initiative X x-descriptor XML (eXtensible Markup Language) Z z-index
