回答編集履歴
2
コードコメント修正
test
CHANGED
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@@ -208,7 +208,7 @@
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// cssはPCファーストで書いてたけど，
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// jsはSPファーストで書いてるので，
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// jsはSPファーストで書いてるので，「MAX-width: 768px」ではなく，「MIN-width: 768.0001px」
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const mediaQuery = matchMedia('(min-width: 768.0001px)');
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コードの追記
test
CHANGED
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@@ -12,6 +12,236 @@
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```html
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<input type="checkbox" id="menu_tgl">
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<label for="menu_tgl" data-ui>menu</label>
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<header>
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<nav>
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<ul id="menu_list">
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<li><a href="#">AAA</a></li>
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<li><a href="#">BBB</a></li>
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<li><a href="#">CCC</a></li>
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</ul>
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</nav>
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</header>
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```
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```css
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*,*::before,*::after {
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padding: 0;
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margin: 0;
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box-sizing: border-box;
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}
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[data-ui] {
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-webkit-user-select: none;
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-moz-user-select: none;
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-ms-user-select: none;
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user-select: none;
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}
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#menu_tgl,
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[for="menu_tgl"] {/* toggle */
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position: fixed;
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top: 0;
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right: 0;
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z-index: 0; /* @SP, for make UNtouchable */
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display: none;
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width: 50px;
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height: 50px;
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background: palegreen;
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opacity: 0.5;
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}
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#menu_list {
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display: flex;
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list-style: none;
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text-align: center;
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background: palegreen;
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transition: 0s;
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}
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#menu_list > li {
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border: 1px solid gray;
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padding: 1em;
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margin: 1em;
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}
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/* at transition PC -> SP, to prevent show animation of menu, wrapper of menu need to change own position with no transition time */
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nav {
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position: fixed;
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top: 0;
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left: 0;
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width: 100%;
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}
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nav a {
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display: block;
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}
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/* @SP */
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@media screen and (max-width: 768px) {
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#menu_tgl,
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[for="menu_tgl"] {
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display: block;
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z-index: 100; /* @SP, for make touchable */
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}
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nav {
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top: auto;
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bottom: 100%;
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}
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#menu_list {
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flex-direction: column;
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opacity: 0;
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transition: 0.5s;
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}
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#menu_tgl:checked ~ header #menu_list {
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transform: translateY(100%);
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opacity: 1;
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}
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}
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```
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```js
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// cf. .matchMedia()でJSでもメディアクエリを使って条件分岐する | SPYWEB
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// https://spyweb.media/2018/01/10/css-media-queries-in-js-matchmedia/
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209
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// cssはPCファーストで書いてたけど，
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210
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+
|
|
211
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+
// jsはSPファーストで書いてるので，'MAX-width: 768.0001px'にしている
|
|
212
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+
|
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213
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+
const mediaQuery = matchMedia('(min-width: 768.0001px)');
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function handle(mq) {
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if (mq.matches) {
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document.getElementById("menu_tgl").checked = false;
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}
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}
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// ページが読み込まれた時に実行
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handle(mediaQuery);
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// ウィンドウサイズが変更されても実行されるように
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mediaQuery.addListener(handle);
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```
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15
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そのほか，ひとこと（複数）：
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