Believemy

HTML and CSS glossary

Browse the terms and definitions most commonly used in HTML and CSS development.
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<!DOCTYPE>

3D transform

@media print

a

auto-fit and auto-fill

<animateMotion>

animation-fill-mode

aspect-ratio

<audio>

<aside>

<article>

Attribute selector

<animateTransform>

<area>

<animate>

align-items

align-content

<address>

Angle and time units

align-self

<a>

<abbr>

<acronym>

b

background shorthand

background-color

background-image

BEM

border

border-radius

Box model

box-shadow

box-sizing

Breakpoint

backdrop-filter

bdo

::before and ::after

<b>

<base>

<bdi>

<blockquote>

<body>

<br>

<button>

c

CSS Grid

CSS filter

CSS selector

CSS reset and normalize

CSS inheritance

clamp(), min() and max()

CSS gradient

CSS animation

CSS custom property

CSS combinators

CSS color

CSS units

content

Container query

CSS sizing

Cascade layer

CSS-wide keywords

currentColor

cursor

Class selector

Cascade

<clipPath>

<code>

<col>

calc()

<cite>

<circle>

<caption>

<colgroup>

<canvas>

clip-path

d

<data>

<datalist>

<dfn>

<dd>

<defs>

<del>

<desc>

<details>

<dialog>

display

<div>

<dt>

<dl>

e

<ellipse>

<em>

<embed>

Easing and timing function

f

footer

flex

feature query

feMergeNode

font-weight

flex-direction

flex-wrap

Flexbox

float

font-family

fr unit

font-size

<figure>

<feDisplacementMap>

<feTurbulence>

<feOffset>

<feMerge>

<feGaussianBlur>

<feFlood>

<feDropShadow>

<feComposite>

<figcaption>

<feColorMatrix>

<feBlend>

<filter>

<foreignObject>

<form>

<fieldset>

g

<g>

grid-template-areas

gap

grid-template-columns

grid-auto-flow

Grid vs Flexbox

grid-column and grid-row

h

<header>

:hover

<html>

<hr>

:has()

<hgroup>

<h5>

<head>

<h6>

<h4>

<h3>

<h2>

<h1>

i

<img>

ID selector

<image>

<ins>

<input>

!important

<i>

<iframe>

:is() and :where()

j

justify-content

k

<kbd>

l

Logical properties

<line>

list-style

<link>

<linearGradient>

<legend>

<label>

letter-spacing and word-spacing

li

line-height

m

<mask>

<main>

<map>

<mark>

<marker>

<meter>

<math>

<menu>

<meta>

Mobile first

mix-blend-mode

Media query

mask

margin

n

<nav>

<noscript>

:not()

:nth-child()

Native CSS nesting

o

<ol>

<optgroup>

object-fit

opacity

order

outline

overflow

<option>

<output>

<object>

p

<p>

<path>

<picture>

<polygon>

<polyline>

<pre>

<progress>

<pattern>

position: sticky

pointer-events

prefers-color-scheme

padding

prefers-reduced-motion

Pseudo-class

Pseudo-element

position

q

<q>

r

rem and em

repeat() and minmax()

<rect>

<rp>

<rt>

<ruby>

rgba() and hsla()

<radialGradient>

s

scroll-behavior

Specificity

subgrid

stacking context

<summary>

<style>

<small>

<svg>

<sub>

<strong>

<stop>

<span>

<source>

<slot>

<symbol>

<set>

<select>

<section>

<search>

<script>

<samp>

<s>

<switch>

<sup>

t

<td>

<title>

transition

transform-origin

transform

text-transform

text-overflow and ellipsis

text-decoration

text-align

<tbody>

<track>

<tr>

<tspan>

<time>

<template>

<th>

<tfoot>

<thead>

<textPath>

<table>

<textarea>

<text>

u

<u>

<ul>

<use>

Universal selector

v

Viewport units

<view>

<var>

<video>

visibility

w

will-change

<wbr>

white-space

z

z-index

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