vue项目笔记（4）-常用的基础样式（reset.css与border.css）

reset.css

不同浏览器对相同标签的显示效果，有时候往往不同，那么在做项目的时候就需要对基本的样式进行设置，以达到在不同浏览器下显示效果是相同的，reset.css的作用就在于此。所有，大家很有必要收藏一下，在做项目的时候直接使用即可。

具体代码：

@charset "utf-8";
html {
    background-color: #fff;
    color: #000;
    font-size: 12px
}

body,
ul,
ol,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
figure,
form,
fieldset,
legend,
input,
textarea,
button,
p,
blockquote,
th,
td,
pre,
xmp {
    margin: 0;
    padding: 0
}

body,
input,
textarea,
button,
select,
pre,
xmp,
tt,
code,
kbd,
samp {
    line-height: 1.5;
    font-family: tahoma, arial, "Hiragino Sans GB", simsun, sans-serif
}

h1,
h2,
h3,
h4,
h5,
h6,
small,
big,
input,
textarea,
button,
select {
    font-size: 100%
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: tahoma, arial, "Hiragino Sans GB", "微软雅黑", simsun, sans-serif
}

h1,
h2,
h3,
h4,
h5,
h6,
b,
strong {
    font-weight: normal
}

address,
cite,
dfn,
em,
i,
optgroup,
var {
    font-style: normal
}

table {
    border-collapse: collapse;
    border-spacing: 0;
    text-align: left
}

caption,
th {
    text-align: inherit
}

ul,
ol,
menu {
    list-style: none
}

fieldset,
img {
    border: 0
}

img,
object,
input,
textarea,
button,
select {
    vertical-align: middle
}

article,
aside,
footer,
header,
section,
nav,
figure,
figcaption,
hgroup,
details,
menu {
    display: block
}

audio,
canvas,
video {
    display: inline-block;
    *display: inline;
    *zoom: 1
}

blockquote:before,
blockquote:after,
q:before,
q:after {
    content: "\0020"
}

textarea {
    overflow: auto;
    resize: vertical
}

input,
textarea,
button,
select,
a {
    outline: 0 none;
    border: none;
}

button::-moz-focus-inner,
input::-moz-focus-inner {
    padding: 0;
    border: 0
}

mark {
    background-color: transparent
}

a,
ins,
s,
u,
del {
    text-decoration: none
}

sup,
sub {
    vertical-align: baseline
}

html {
    overflow-x: hidden;
    height: 100%;
    font-size: 50px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: Arial, "Microsoft Yahei", "Helvetica Neue", Helvetica, sans-serif;
    color: #333;
    font-size: .28em;
    line-height: 1;
    -webkit-text-size-adjust: none;
}

hr {
    height: .02rem;
    margin: .1rem 0;
    border: medium none;
    border-top: .02rem solid #cacaca;
}

a {
    color: #25a4bb;
    text-decoration: none;
}

border.css

该css样式用于解决移动端1像素边框问题。问题分析：有些手机的屏幕分辨率较高，是2-3倍屏幕。css样式中border:1px solid red;在2倍屏下，显示的并不是1个物理像素，而是2个物理像素。为了解决这个问题，引入border.css是非常有必要的。

具体代码：

@charset "utf-8";
.border,
.border-top,
.border-right,
.border-bottom,
.border-left,
.border-topbottom,
.border-rightleft,
.border-topleft,
.border-rightbottom,
.border-topright,
.border-bottomleft {
    position: relative;
}
.border::before,
.border-top::before,
.border-right::before,
.border-bottom::before,
.border-left::before,
.border-topbottom::before,
.border-topbottom::after,
.border-rightleft::before,
.border-rightleft::after,
.border-topleft::before,
.border-topleft::after,
.border-rightbottom::before,
.border-rightbottom::after,
.border-topright::before,
.border-topright::after,
.border-bottomleft::before,
.border-bottomleft::after {
    content: "\0020";
    overflow: hidden;
    position: absolute;
}
/* border
 * 因，边框是由伪元素区域遮盖在父级
 * 故，子级若有交互，需要对子级设置
 * 定位 及 z轴
 */
.border::before {
    box-sizing: border-box;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border: 1px solid #eaeaea;
    transform-origin: 0 0;
}
.border-top::before,
.border-bottom::before,
.border-topbottom::before,
.border-topbottom::after,
.border-topleft::before,
.border-rightbottom::after,
.border-topright::before,
.border-bottomleft::before {
    left: 0;
    width: 100%;
    height: 1px;
}
.border-right::before,
.border-left::before,
.border-rightleft::before,
.border-rightleft::after,
.border-topleft::after,
.border-rightbottom::before,
.border-topright::after,
.border-bottomleft::after {
    top: 0;
    width: 1px;
    height: 100%;
}
.border-top::before,
.border-topbottom::before,
.border-topleft::before,
.border-topright::before {
    border-top: 1px solid #eaeaea;
    transform-origin: 0 0;
}
.border-right::before,
.border-rightbottom::before,
.border-rightleft::before,
.border-topright::after {
    border-right: 1px solid #eaeaea;
    transform-origin: 100% 0;
}
.border-bottom::before,
.border-topbottom::after,
.border-rightbottom::after,
.border-bottomleft::before {
    border-bottom: 1px solid #eaeaea;
    transform-origin: 0 100%;
}
.border-left::before,
.border-topleft::after,
.border-rightleft::after,
.border-bottomleft::after {
    border-left: 1px solid #eaeaea;
    transform-origin: 0 0;
}
.border-top::before,
.border-topbottom::before,
.border-topleft::before,
.border-topright::before {
    top: 0;
}
.border-right::before,
.border-rightleft::after,
.border-rightbottom::before,
.border-topright::after {
    right: 0;
}
.border-bottom::before,
.border-topbottom::after,
.border-rightbottom::after,
.border-bottomleft::after {
    bottom: 0;
}
.border-left::before,
.border-rightleft::before,
.border-topleft::after,
.border-bottomleft::before {
    left: 0;
}
@media (max--moz-device-pixel-ratio: 1.49), (-webkit-max-device-pixel-ratio: 1.49), (max-device-pixel-ratio: 1.49), (max-resolution: 143dpi), (max-resolution: 1.49dppx) {
    /* 默认值，无需重置 */
}
@media (min--moz-device-pixel-ratio: 1.5) and (max--moz-device-pixel-ratio: 2.49), (-webkit-min-device-pixel-ratio: 1.5) and (-webkit-max-device-pixel-ratio: 2.49), (min-device-pixel-ratio: 1.5) and (max-device-pixel-ratio: 2.49), (min-resolution: 144dpi) and (max-resolution: 239dpi), (min-resolution: 1.5dppx) and (max-resolution: 2.49dppx) {
    .border::before {
        width: 200%;
        height: 200%;
        transform: scale(.5);
    }
    .border-top::before,
    .border-bottom::before,
    .border-topbottom::before,
    .border-topbottom::after,
    .border-topleft::before,
    .border-rightbottom::after,
    .border-topright::before,
    .border-bottomleft::before {
        transform: scaleY(.5);
    }
    .border-right::before,
    .border-left::before,
    .border-rightleft::before,
    .border-rightleft::after,
    .border-topleft::after,
    .border-rightbottom::before,
    .border-topright::after,
    .border-bottomleft::after {
        transform: scaleX(.5);
    }
}
@media (min--moz-device-pixel-ratio: 2.5), (-webkit-min-device-pixel-ratio: 2.5), (min-device-pixel-ratio: 2.5), (min-resolution: 240dpi), (min-resolution: 2.5dppx) {
    .border::before {
        width: 300%;
        height: 300%;
        transform: scale(.33333);
    }
    .border-top::before,
    .border-bottom::before,
    .border-topbottom::before,
    .border-topbottom::after,
    .border-topleft::before,
    .border-rightbottom::after,
    .border-topright::before,
    .border-bottomleft::before {
        transform: scaleY(.33333);
    }
    .border-right::before,
    .border-left::before,
    .border-rightleft::before,
    .border-rightleft::after,
    .border-topleft::after,
    .border-rightbottom::before,
    .border-topright::after,
    .border-bottomleft::after {
        transform: scaleX(.33333);
    }
}

使用方法：在vue项目中的入口文件main.js中引入即可。

// 在入口文件中引入基本样式
import './assets/styles/reset.css'
import './assets/styles/border.css'