css属性规范
AprilTong 7/14/2021 CSS
# css 属性书写顺序
- 布局定位属性: display / position / float / clear / visibility / overflow
- 自身属性: width / height / margin / padding / border / background
- 文本属性: color / font / text-decoration / text-align / vertical-align / white-space / break-word
- 其他属性(css3): content / cursor / border-radius / box-shadow / text-shadow
# 属性值引号
css 属性需要用到引号时，统一使用单引号
/* 推荐 */
body {
font-family: 'Hiragino Sans GB';
}
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# 选择器
- 尽量少用通用选择器 *
- 不使用 ID 选择器
- 不使用无具体语义定义的标签选择器
# 代码选择器
样式选择器，属性名，属性值关键字全部使用小写字母书写。
/* 推荐 */
.box {
display: block;
}
/* 不推荐 */
.box {
display: BLOCK;
}
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# 其他注意的
- 每个属性声明末尾加分号
- 左括号与类名之间一个空格，冒号与属性值之间一个空格
- 为单个 css 选择器或新申明开启新行
- 属性值十六进制数值能用简写的尽量用简写
- 不要为 0 设置单位
# 重置样式
移动端
* {
-webkit-tap-highlight-color: transparent;
outline: 0;
margin: 0;
padding: 0;
vertical-align: baseline;
}
body,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
p,
blockquote,
dl,
dt,
dd,
ul,
ol,
li,
pre,
form,
fieldset,
legend,
button,
input,
textarea,
th,
td {
margin: 0;
padding: 0;
vertical-align: baseline;
}
img {
border: 0 none;
vertical-align: top;
}
i,
em {
font-style: normal;
}
ol,
ul {
list-style: none;
}
input,
select,
button,
h1,
h2,
h3,
h4,
h5,
h6 {
font-size: 100%;
font-family: inherit;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
a {
text-decoration: none;
color: #666;
}
body {
margin: 0 auto;
min-width: 320px;
max-width: 640px;
height: 100%;
font-size: 14px;
font-family: -apple-system, Helvetica, sans-serif;
line-height: 1.5;
color: #666;
-webkit-text-size-adjust: 100% !important;
text-size-adjust: 100% !important;
}
input[type='text'],
textarea {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
}
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pc 端
html,
body,
div,
h1,
h2,
h3,
h4,
h5,
h6,
p,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
input,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
textarea,
article,
aside,
audio,
canvas,
figure,
footer,
header,
mark,
menu,
nav,
section,
time,
video {
margin: 0;
padding: 0;
}
h1,
h2,
h3,
h4,
h5,
h6 {
font-size: 100%;
font-weight: normal;
}
article,
aside,
dialog,
figure,
footer,
header,
hgroup,
nav,
section,
blockquote {
display: block;
}
ul,
ol {
list-style: none;
}
img {
border: 0 none;
vertical-align: top;
}
blockquote,
q {
quotes: none;
}
blockquote:before,
blockquote:after,
q:before,
q:after {
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
strong,
em,
i {
font-style: normal;
font-weight: normal;
}
ins {
text-decoration: underline;
}
del {
text-decoration: line-through;
}
mark {
background: none;
}
input::-ms-clear {
display: none !important;
}
body {
font: 12px/1.5 \5fae\8f6f\96c5\9ed1, \5b8b\4f53, 'Hiragino Sans GB', STHeiti, 'WenQuanYi Micro Hei', 'Droid Sans Fallback',
SimSun, sans-serif;
background: #fff;
}
a {
text-decoration: none;
color: #333;
}
a:hover {
text-decoration: underline;
}
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