一、在根目录下面新建assets文件夹

assets下面新建一个css文件夹，css文件夹下面新建一个reset.css

代码如下

html,
body,
div,
span,
applet,
object,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: 0;
}
/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
  display: block;
}
ol,
ul,
li {
  list-style: none;
}
blockquote,
q {
  quotes: none;
}
blockquote:before,
blockquote:after,
q:before,
q:after {
  content: "";
  content: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
th,
td {
  vertical-align: middle;
}
/* custom */
a {
  outline: none;
  text-decoration: none;
  -webkit-backface-visibility: hidden;
}
a:focus {
  outline: none;
}
input:focus,
select:focus,
textarea:focus {
  outline: -webkit-focus-ring-color auto 0;
}

二、main.js引入

// css样式重置
import './assets/css/reset.css'