1px边框问题在实际项目中非常重要
一、关于reset.css
因为不同的浏览器默认的样式不同,所以在着手项目开始前,我们需要引入reset.css,将所有html标签的默认样式统一化。我这里推荐一个下载reset.css的网站:https://cssreset.com/,里面还有一些normalize.css之类的,大家有兴趣可以研究。
二、关于1px边框问题
因为自从retina屏以来,不同的手机又不同的像素密度,css中的1px并不等于移动设备中的1px, 最直接的表现就是1px边框问题;简单说就是你给border的css写个1px,到手机上却变粗了显示成2px。
所以在项目中我们引入一个border.css解决这个问题。
三、项目中引入
1、新建styles
文件夹
把reset.css
和border.css
粘贴到此:
reset.css
@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
@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);
}
}
2、main.js中引入reset.css以及border.css
3、配置路径
我觉得'./assets/styles/reset.css'
这个路径太长了,所以我们在webapck.base.conf.js
中的alias
中配置下路径
4、main.js中简化下路径引入
上面步骤完成以后,因为修改了webpack里面的配置,所以我们需要npm run dev重启一下服务,ok。