QA

Transition

• duration

CSS Basic

命名

• wrapper
• container
• flex-container
• input-box

pseudo class

• first-child
• :not(:first-child)

Hover

.btn:hover {
    background-color: red;
}

def variable and use

:root {
    --blue: #007bff;
}

.btn {
    background-color: var(--blue);
}

button

name

• button--primary
• button--secondary
• button--danger

.btn {
    cursor: pointer;
    padding: 4px 8px;
    font-weight: bold;
    align-items: center;
    border: 1px solid #000;
    border-radius: 2rem;
    display: flex;
    gap: 1/2rem;
}
.btn:focus{
    outline: 2px solid #000;
  outline-offset: 1px;
}
.btn:disabled{
    opacity: 0.25;
    cursor: not-allowed;
    transition: all 0.3s linear;
}

input

input:focus {
    outline: 1px solid #000;
}

```css
.input-box {
  --size: 3rem;
  height: var(--size);
  width: var(--size);
  border: none;
  outline: none;
  font-weight: 600;
  font-size: 1.5rem;
}

## hidden

```css
.hidden {
    display: none;
}

wrapper

.wrapper {
    width: 100vw;
    height: 100vh;
}

BEM

先说细节,再说更加specific的

EX: like-button--default 和 like-button--liked