Web制作者は要チェック！現在のWeb制作に合わせて制作された新しいCSSリセット -Reseter.css

Post on:2021年4月12日

Reseter.cssの特徴

Reseter.cssは現在のWeb制作に合わせて制作された新しいCSSリセットで、ブラウザによって事前に作成されたすべてのスタイルをリセットします。クロスブラウザのエクスペリエンスを向上させるために、ブラウザのスタイルシートを正規化します。

Reseter.css

バグやブラウザの不整合を修正
さまざまな要素のスタイルをリブート
.css, .min.cssの他に4つの異なるフォーマット（.sass, .scss, .less, .js）
ファイルサイズは、2.6Kb
全要素のノーマライズが含まれます
box-sizing: border-box;を設定
すべてのブラウザで検証済み、最後から5つ前までのバージョンをサポート

人気が高いCSSリセットとの比較

各CSSリセットについては、以前の記事をご覧ください。

モダンブラウザに適したCSSリセットのまとめ

下記は、Chrome, IEのデフォルトとReseter.cssを使用した同じHTMLファイルの表示結果です。Chromeでは見出しが太字になり（Firefoxも同じ）、IEはさらに太くなりすぎています。IEでは本文のフォントも太字で、ボタンの境界線はブルーです。Firefoxではボタンの境界線は少し少なくなっています。

下記ではたった5種類のタグですが、実際には多くのHTMLのタグがあり、ブラウザも数多くの種類があります。これらのブラウザに対応するためにどうすればよいか、その答えがReseter.cssです。

5種類のHTMLタグによる各ブラウザでの表示の差異

Reseter.cssの使い方

通常のCSSリセットと同様に、HTMLに外部ファイルとして記述するだけです。

<!DOCTYPE html>
<html lang="ja">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>タイトル</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/krishdevdb/reseter.css/css/reseter.min.css">
  </head>
  <body>

  </body>
</html>

<!DOCTYPE html>

<head>

</head>

<body>

</body>

</html>

CDNはUnpkg, CDNJS, Githubなどでも提供されています。もちろん、ファイルはダウンロードして利用することもでき、NPMやYarnなどのパッケージマネージャのも用意されています。

npm install reseter.css

yarn add reseter.css

npm install reseter.css

yarn add reseter.css

CodePenにreseter.cssを適用したHTMLが用意されているので、試せます。

See the Pen
Reseter.css Quick Start For CodePen by Krish Dev DB (@krishdevdb)
on CodePen.

Reseter.cssの中身

2021年4月現在、Reseter.cssの最新版は下記の通りです。
Webページの実装によく使用する要素のスタイルをはじめ、role="button"にcursor: pointer;を適用したり、input::placeholderの不透明度をノーマライズしたり、アクセシビリティにも配慮されています。

@charset "UTF-8";
*,
*::before,
*::after {
  box-sizing: border-box;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  *,
*::before,
*::after {
    -webkit-animation-delay: -1ms;
            animation-delay: -1ms;
    -webkit-animation-duration: 1ms;
            animation-duration: 1ms;
    -webkit-animation-iteration-count: 1;
            animation-iteration-count: 1;
    background-attachment: initial;
    scroll-behavior: auto;
    transition-delay: 0s;
    transition-duration: 0s;
  }
}

html,
body,
div,
span,
applet,
object,
iframe,
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 {
  cursor: default;
  -moz-tab-size: 4;
    -o-tab-size: 4;
       tab-size: 4;
  margin: 0;
  padding: 0;
  border: none;
  font: inherit;
  font-size: 100%;
  vertical-align: baseline;
}

html {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: inherit;
  background-color: inherit;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

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

[tabindex="-1"]:focus:not(:focus-visible) {
  outline: 0;
}

hr {
  margin: 1rem 0;
  color: inherit;
  background-color: currentColor;
  border: 0;
  opacity: 0.25;
  overflow: visible;
}
hr:not([size]) {
  height: 1px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-weight: 500;
  line-height: 1.2;
}

h1 {
  font-size: calc(1.375rem + 1.5vw);
}
@media (min-width: 1200px) {
  h1 {
    font-size: 2.5rem;
  }
}

h2 {
  font-size: calc(1.325rem + 0.9vw);
}
@media (min-width: 1200px) {
  h2 {
    font-size: 2rem;
  }
}

h3 {
  font-size: calc(1.3rem + 0.6vw);
}
@media (min-width: 1200px) {
  h3 {
    font-size: 1.75rem;
  }
}

h4 {
  font-size: calc(1.275rem + 0.3vw);
}
@media (min-width: 1200px) {
  h4 {
    font-size: 1.5rem;
  }
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

abbr[title],
abbr[data-bs-original-title] {
  -webkit-text-decoration: underline dotted;
  text-decoration: underline dotted;
  cursor: help;
  -webkit-text-decoration-skip-ink: none;
  text-decoration-skip-ink: none;
}

address {
  margin-bottom: 1rem;
  font-style: normal;
  line-height: inherit;
}

ol,
ul {
  padding-left: 2rem;
}

ol,
ul,
dl {
  margin-top: 0;
  margin-bottom: 1rem;
}

ol ol,
ul ul,
ol ul,
ul ol {
  margin-bottom: 0;
}

nav li {
  list-style: none;
  padding: 0;
}
nav li::before {
  content: "";
}

dt {
  font-weight: 700;
}

dd {
  margin-bottom: 0.5rem;
  margin-left: 0;
}

blockquote {
  margin: 0 0 1rem;
}

b,
strong {
  font-weight: bolder;
}

small {
  font-size: 0.875em;
}

mark {
  padding: 0.2em;
  background-color: currentColor;
}

sub,
sup {
  position: relative;
  font-size: 0.75em;
  line-height: 0;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

a {
  cursor: pointer;
  color: #3333e1;
  background-color: transparent;
  text-decoration: none;
}
a:hover {
  color: #3434e0;
  text-decoration: underline;
}
a:focus {
  outline: thin dotted;
}
a:not([href]):not(class), a:not([href]):not([class]):hover {
  cursor: default;
  color: inherit;
  text-decoration: none;
}

a,
area,
button,
input,
label,
select,
summary,
textarea,
[tabindex] {
  touch-action: manipulation;
}

pre,
code,
kbd,
samp {
  font-family: "Fira Code", "Cascadia Code", Consolas, "Inconsolata", Monaco, Menlo, "Noto Mono", "Roboto Mono", "Droid Sans Mono", "Ubuntu Mono", "Ubuntu Monospace", "Source Code Pro", "Oxygen Mono", "Liberation Mono", "DejaVu Sans Mono", "Bitstream Vera Sans Mono", monospace, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-size: 1.05em;
}

pre {
  display: block;
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 0.875em;
  overflow: auto;
  -ms-overflow-style: scrollbar;
}
pre code {
  font-size: inherit;
  color: inherit;
  word-break: normal;
}

code {
  font-size: 0.875em;
  color: inherit;
  word-wrap: break-word;
}

a > code {
  color: inherit;
}

kbd {
  padding: 0.2rem 0.4rem;
  font-size: 0.875em;
  color: inherit;
  background-color: inherit;
  border-radius: 0.2rem;
}
kbd kbd {
  padding: 0;
  font-size: 1em;
  font-weight: 700;
}

figure {
  margin: 0 0 1rem;
}

iframe,
img,
input,
select,
textarea {
  height: auto;
  max-width: 100%;
}

audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle;
}

svg:not([fill]) {
  fill: currentColor;
}
svg:not(:root) {
  overflow: hidden;
}

img {
  border: 0;
  -ms-interpolation-mode: bicubic;
}

table {
  caption-side: bottom;
  border-collapse: collapse;
  text-indent: 0;
}

caption {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  color: inherit;
  text-align: left;
}

th {
  text-align: inherit;
  text-align: -webkit-match-parent;
}

thead,
tbody,
tfoot,
tr,
td,
th {
  border-color: inherit;
  border-style: solid;
  border-width: 0;
}

label {
  display: inline-block;
}

button {
  border-radius: 0;
  text-transform: none;
}
button:focus {
  outline: dotted 1px;
  outline: -webkit-focus-ring-color auto 5px;
}

input,
button {
  overflow: visible;
}

input,
button,
select,
optgroup,
textarea {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button,
input,
select,
textarea {
  background-color: transparent;
  border: 1px solid WindowFrame;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  padding: 0.25em 0.375em;
}

button,
select {
  text-transform: none;
}

[role=button] {
  cursor: pointer;
}

select {
  -moz-appearance: none;
  -webkit-appearance: none;
  text-transform: none;
  word-wrap: normal;
}
select:not([multiple]):not([size]) {
  background-image: "data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='4'%3E%3Cpath d='M4 0h6L7 4'/%3E%3C/svg%3E";
}

::-ms-expand {
  display: none;
}

[list]::-webkit-calendar-picker-indicator {
  display: none;
}

button,
[type=button],
[type=reset],
[type=submit] {
  -webkit-appearance: button;
}
button:not(disabled),
[type=button]:not(disabled),
[type=reset]:not(disabled),
[type=submit]:not(disabled) {
  cursor: pointer;
}

::-webkit-file-upload-button {
  font: inherit;
  -webkit-appearance: button;
}

textarea {
  overflow: auto;
  -ms-overflow-style: scrollbar;
  resize: vertical;
  vertical-align: top;
}

fieldset {
  min-width: 0;
  padding: 0.35em 0.75em 0.625em;
  margin: 0;
  border: 1px solid inherit;
}

legend {
  float: left;
  width: 100%;
  padding: 0;
  margin-bottom: 0.5rem;
  font-size: calc(1.275rem + 0.3vw);
  line-height: inherit;
  max-width: 100%;
  white-space: normal;
}
@media (max-width: 1200px) {
  legend {
    font-size: 1.5rem;
  }
}
legend + * {
  clear: left;
}

dialog {
  background-color: inherit;
  border: solid;
  color: inherit;
  display: block;
  height: -webkit-fit-content;
  height: -moz-fit-content;
  height: fit-content;
  left: 0;
  margin: auto;
  padding: 1em;
  position: absolute;
  right: 0;
  width: -webkit-fit-content;
  width: -moz-fit-content;
  width: fit-content;
}
dialog:not([open]) {
  display: none;
}

::-webkit-datetime-edit-fields-wrapper,
::-webkit-datetime-edit-text,
::-webkit-datetime-edit-minute,
::-webkit-datetime-edit-hour-field,
::-webkit-datetime-edit-day-field,
::-webkit-datetime-edit-month-field,
::-webkit-datetime-edit-year-field {
  padding: 0;
}

::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
  height: auto;
}

::-webkit-input-placeholder {
  color: inherit;
  opacity: 0.54;
}

input::-webkit-input-placeholder {
  opacity: 1;
}

input::-moz-placeholder {
  opacity: 1;
}

input:-ms-input-placeholder {
  opacity: 1;
}

input::placeholder {
  opacity: 1;
}

[type=search] {
  outline-offset: -2px;
  -webkit-appearance: none;
  -moz-appearance: none;
  box-sizing: content-box;
}

input[type=search]::-webkit-search-cancel-button,
input[type=search]::-webkit-search-decoration,
input[type=search]::-webkit-search-results-button,
input[type=search]::-webkit-search-results-decoration {
  -webkit-appearance: none;
  -moz-appearance: none;
}

[type=tel],
[type=url],
[type=email],
[type=number] {
  direction: ltr;
}

::-webkit-color-swatch-wrapper {
  padding: 0;
}

::-moz-focus-inner {
  padding: 0;
  border-style: none;
}

::-moz-ui-invalid {
  box-shadow: none;
}

::-moz-focusring {
  outline: 1px dotted ButtonText;
}

output {
  display: inline-block;
}

iframe {
  border: none;
}

audio,
canvas,
video {
  display: inline;
  display: inline-block;
  zoom: 1;
  max-width: 100%;
}

audio:not([controls]) {
  display: none;
  height: 0;
}

summary {
  display: list-item;
  cursor: pointer;
}

progress {
  display: inline-block;
  vertical-align: baseline;
}

template {
  display: none;
}

[hidden] {
  display: none;
}

[aria-busy=true] {
  cursor: progress;
}

[aria-controls] {
  cursor: pointer;
}

[aria-disabled=true],
[disabled] {
  cursor: not-allowed;
}

[aria-hidden=false][hidden=false] {
  display: initial;
}
[aria-hidden=false][hidden=false]:not(:focus) {
  clip: rect(0, 0, 0, 0);
  position: absolute;
}

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@charset "UTF-8";

*::before,

*::after {

box-sizing: border-box;

scroll-behavior: smooth;

}

@media (prefers-reduced-motion: reduce) {

*::before,

*::after {

-webkit-animation-delay: -1ms;

animation-delay: -1ms;

-webkit-animation-duration: 1ms;

animation-duration: 1ms;

-webkit-animation-iteration-count: 1;

animation-iteration-count: 1;

background-attachment: initial;

scroll-behavior: auto;

transition-delay: 0s;

transition-duration: 0s;

}

html,

body,

div,

span,

applet,

object,

iframe,

h1,

h2,

h3,

h4,

h5,

h6,

blockquote,

pre,

abbr,

acronym,

address,

big,

cite,

code,

del,

dfn,

em,

img,

ins,

kbd,

samp,

small,

strike,

strong,

sub,

sup,

tt,

var,

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 {

cursor: default;

-moz-tab-size: 4;

-o-tab-size: 4;

tab-size: 4;

margin: 0;

padding: 0;

border: none;

font: inherit;

font-size: 100%;

vertical-align: baseline;

}

html {

font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";

font-size: 1rem;

font-weight: 400;

line-height: 1.5;

color: inherit;

background-color: inherit;

-webkit-text-size-adjust: 100%;

-webkit-tap-highlight-color: transparent;

}

article,

aside,

details,

figcaption,

figure,

footer,

header,

hgroup,

menu,

nav,

section {

display: block;

}

[tabindex="-1"]:focus:not(:focus-visible) {

outline: 0;

}

hr {

margin: 1rem 0;

color: inherit;

background-color: currentColor;

border: 0;

opacity: 0.25;

overflow: visible;

}

hr:not([size]) {

height: 1px;

}

h1,

h2,

h3,

h4,

h5,

h6 {

margin-top: 0;

margin-bottom: 0.5rem;

font-weight: 500;

line-height: 1.2;

}

h1 {

font-size: calc(1.375rem + 1.5vw);

}

@media (min-width: 1200px) {

h1 {

font-size: 2.5rem;

}

h2 {

font-size: calc(1.325rem + 0.9vw);

}

@media (min-width: 1200px) {

h2 {

font-size: 2rem;

}

h3 {

font-size: calc(1.3rem + 0.6vw);

}

@media (min-width: 1200px) {

h3 {

font-size: 1.75rem;

}

h4 {

font-size: calc(1.275rem + 0.3vw);

}

@media (min-width: 1200px) {

h4 {

font-size: 1.5rem;

}

h5 {

font-size: 1.25rem;

}

h6 {

font-size: 1rem;

}

p {

margin-top: 0;

margin-bottom: 1rem;

}

abbr[title],

abbr[data-bs-original-title] {

-webkit-text-decoration: underline dotted;

text-decoration: underline dotted;

cursor: help;

-webkit-text-decoration-skip-ink: none;

text-decoration-skip-ink: none;

}

address {

margin-bottom: 1rem;

font-style: normal;

line-height: inherit;

}

ol,

ul {

padding-left: 2rem;

}

ol,

ul,

dl {

margin-top: 0;

margin-bottom: 1rem;

}

ol ol,

ul ul,

ol ul,

ul ol {

margin-bottom: 0;

}

nav li {

list-style: none;

padding: 0;

}

nav li::before {

content: "";

}

dt {

font-weight: 700;

}

dd {

margin-bottom: 0.5rem;

margin-left: 0;

}

blockquote {

margin: 0 0 1rem;

}

strong {

font-weight: bolder;

}

small {

font-size: 0.875em;

}

mark {

padding: 0.2em;

background-color: currentColor;

}

sub,

sup {

position: relative;

font-size: 0.75em;

line-height: 0;

vertical-align: baseline;

}

sub {

bottom: -0.25em;

}

sup {

top: -0.5em;

}

a {

cursor: pointer;

color: #3333e1;

background-color: transparent;

text-decoration: none;

}

a:hover {

color: #3434e0;

text-decoration: underline;

}

a:focus {

outline: thin dotted;

}

a:not([href]):not(class), a:not([href]):not([class]):hover {

cursor: default;

color: inherit;

text-decoration: none;

}

area,

button,

input,

label,

select,

summary,

textarea,

[tabindex] {

touch-action: manipulation;

}

pre,

code,

kbd,

samp {

font-family: "Fira Code", "Cascadia Code", Consolas, "Inconsolata", Monaco, Menlo, "Noto Mono", "Roboto Mono", "Droid Sans Mono", "Ubuntu Mono", "Ubuntu Monospace", "Source Code Pro", "Oxygen Mono", "Liberation Mono", "DejaVu Sans Mono", "Bitstream Vera Sans Mono", monospace, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";

font-size: 1.05em;

}

pre {

display: block;

margin-top: 0;

margin-bottom: 1rem;

font-size: 0.875em;

overflow: auto;

-ms-overflow-style: scrollbar;

}

pre code {

font-size: inherit;

color: inherit;

word-break: normal;

}

code {

font-size: 0.875em;

color: inherit;

word-wrap: break-word;

}

a > code {

color: inherit;

}

kbd {

padding: 0.2rem 0.4rem;

font-size: 0.875em;

color: inherit;

background-color: inherit;

border-radius: 0.2rem;

}

kbd kbd {

padding: 0;

font-size: 1em;

font-weight: 700;

}

figure {

margin: 0 0 1rem;

}

iframe,

img,

input,

select,

textarea {

height: auto;

max-width: 100%;

}

audio,

canvas,

iframe,

img,

svg,

video {

vertical-align: middle;

}

svg:not([fill]) {

fill: currentColor;

}

svg:not(:root) {

overflow: hidden;

}

img {

border: 0;

-ms-interpolation-mode: bicubic;

}

table {

caption-side: bottom;

border-collapse: collapse;

text-indent: 0;

}

caption {

padding-top: 0.5rem;

padding-bottom: 0.5rem;

color: inherit;

text-align: left;

}

th {

text-align: inherit;

text-align: -webkit-match-parent;

}

thead,

tbody,

tfoot,

tr,

td,

th {

border-color: inherit;

border-style: solid;

border-width: 0;

}

label {

display: inline-block;

}

button {

border-radius: 0;

text-transform: none;

}

button:focus {

outline: dotted 1px;

outline: -webkit-focus-ring-color auto 5px;

}

input,

button {

overflow: visible;

}

input,

button,

select,

optgroup,

textarea {

margin: 0;

font-family: inherit;

font-size: inherit;

line-height: inherit;

}

button,

input,

select,

textarea {

background-color: transparent;

border: 1px solid WindowFrame;

color: inherit;

font: inherit;

letter-spacing: inherit;

padding: 0.25em 0.375em;

}

button,

select {

text-transform: none;

}

[role=button] {

cursor: pointer;

}

select {

-moz-appearance: none;

-webkit-appearance: none;

text-transform: none;

word-wrap: normal;

}

select:not([multiple]):not([size]) {

background-image: "data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='4'%3E%3Cpath d='M4 0h6L7 4'/%3E%3C/svg%3E";

}

::-ms-expand {

display: none;

}

[list]::-webkit-calendar-picker-indicator {

display: none;

}

button,

[type=button],

[type=reset],

[type=submit] {

-webkit-appearance: button;

}

button:not(disabled),

[type=button]:not(disabled),

[type=reset]:not(disabled),

[type=submit]:not(disabled) {

cursor: pointer;

}

::-webkit-file-upload-button {

font: inherit;

-webkit-appearance: button;

}

textarea {

overflow: auto;

-ms-overflow-style: scrollbar;

resize: vertical;

vertical-align: top;

}

fieldset {

min-width: 0;

padding: 0.35em 0.75em 0.625em;

margin: 0;

border: 1px solid inherit;

}

legend {

float: left;

width: 100%;

padding: 0;

margin-bottom: 0.5rem;

font-size: calc(1.275rem + 0.3vw);

line-height: inherit;

max-width: 100%;

white-space: normal;

}

@media (max-width: 1200px) {

legend {

font-size: 1.5rem;

}

legend + * {

clear: left;

}

dialog {

background-color: inherit;

border: solid;

color: inherit;

display: block;

height: -webkit-fit-content;

height: -moz-fit-content;

height: fit-content;

left: 0;

margin: auto;

padding: 1em;

position: absolute;

right: 0;

width: -webkit-fit-content;

width: -moz-fit-content;

width: fit-content;

}

dialog:not([open]) {

display: none;

}

::-webkit-datetime-edit-fields-wrapper,

::-webkit-datetime-edit-text,

::-webkit-datetime-edit-minute,

::-webkit-datetime-edit-hour-field,

::-webkit-datetime-edit-day-field,

::-webkit-datetime-edit-month-field,

::-webkit-datetime-edit-year-field {

padding: 0;

}

::-webkit-inner-spin-button,

::-webkit-outer-spin-button {

height: auto;

}

::-webkit-input-placeholder {

color: inherit;

opacity: 0.54;

}

input::-webkit-input-placeholder {

opacity: 1;

}

input::-moz-placeholder {

opacity: 1;

}

input:-ms-input-placeholder {

opacity: 1;

}

input::placeholder {

opacity: 1;

}

[type=search] {

outline-offset: -2px;

-webkit-appearance: none;

-moz-appearance: none;

box-sizing: content-box;

}

input[type=search]::-webkit-search-cancel-button,

input[type=search]::-webkit-search-decoration,

input[type=search]::-webkit-search-results-button,

input[type=search]::-webkit-search-results-decoration {

-webkit-appearance: none;

-moz-appearance: none;

}

[type=tel],

[type=url],

[type=email],

[type=number] {

direction: ltr;

}

::-webkit-color-swatch-wrapper {

padding: 0;

}

::-moz-focus-inner {

padding: 0;

border-style: none;

}

::-moz-ui-invalid {

box-shadow: none;

}

::-moz-focusring {

outline: 1px dotted ButtonText;

}

output {

display: inline-block;

}

iframe {

border: none;

}

audio,

canvas,

video {

display: inline;

display: inline-block;

zoom: 1;

max-width: 100%;

}

audio:not([controls]) {

display: none;

height: 0;

}

summary {

display: list-item;

cursor: pointer;

}

progress {

display: inline-block;

vertical-align: baseline;

}

template {

display: none;

}

[hidden] {

display: none;

}

[aria-busy=true] {

cursor: progress;

}

[aria-controls] {

cursor: pointer;

}

[aria-disabled=true],

[disabled] {

cursor: not-allowed;

}

[aria-hidden=false][hidden=false] {

display: initial;

}

[aria-hidden=false][hidden=false]:not(:focus) {

clip: rect(0, 0, 0, 0);

position: absolute;

}

reseter.css: 2021/4/10のバージョン

Web制作者は要チェック！現在のWeb制作に合わせて制作された新しいCSSリセット -Reseter.css

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Web制作者は要チェック！現在のWeb制作に合わせて制作された新しいCSSリセット -Reseter.css

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