よく忘れるのでメモしておきます。
CSS、JavaScriptの外部ファイルを使用する際は、「*」を適宜修正すること!!
目次
ファイル一式
HTML5の雛形
<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="utf-8">
  <meta http-equiv="x-ua-compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>タイトル</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css">
  <link rel="stylesheet" href="css/html5reset.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/5.0.1/css/bootstrap.min.css">
  <link rel="stylesheet" href="css/style.css">
</head>
<body>
  <h1>Hello World!!</h1>
<script type='text/javascript' src='js/app.js'></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script>
$(function() {
    console.log("Call jQuery");
});
</script>
</body>
</html>
CSSリセット(HTML5 Reset Stylesheet)
html5reset.css
http://html5doctor.com/html-5-reset-stylesheet/
/*
html5doctor.com Reset Stylesheet
v1.6.1
Last Updated: 2010-09-17
Author: Richard Clark - http://richclarkdesign.com
Twitter: @rich_clark
*/
html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
    margin:0;
    padding:0;
    border:0;
    outline:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;
}
body {
    line-height:1;
}
article,aside,details,figcaption,figure,
footer,header,hgroup,menu,nav,section {
    display:block;
}
nav ul {
    list-style:none;
}
blockquote, q {
    quotes:none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content:'';
    content:none;
}
a {
    margin:0;
    padding:0;
    font-size:100%;
    vertical-align:baseline;
    background:transparent;
}
/* change colours to suit your needs */
ins {
    background-color:#ff9;
    color:#000;
    text-decoration:none;
}
/* change colours to suit your needs */
mark {
    background-color:#ff9;
    color:#000;
    font-style:italic;
    font-weight:bold;
}
del {
    text-decoration: line-through;
}
abbr[title], dfn[title] {
    border-bottom:1px dotted;
    cursor:help;
}
table {
    border-collapse:collapse;
    border-spacing:0;
}
/* change border colour to suit your needs */
hr {
    display:block;
    height:1px;
    border:0;  
    border-top:1px solid #cccccc;
    margin:1em 0;
    padding:0;
}
input, select {
    vertical-align:middle;
}
CSS3の雛形
style.css
@charset "UTF-8";
body {
  font-family: "メイリオ", "Hiragino Kaku Gothic Pro", sans-serif;
}
レスポンシブ
@media screen and (min-width:600px)
{
}
メモ
- 一番小さいスマホの画面サイズ 320px
- メディアクエリは600pxで切る
- ブレイクポイント
- スマートフォンとPCのレイアウトが切り替わるポイント
 
- タブレットは、768px以上と言われ、〜1050pxがPCと言われています。
- PCの横幅設定 980px〜1500pxくらい

