質問編集履歴
2
リンク修正
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これを読みました
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[https://app.codegrid.net/entry/z-index-1](
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[https://app.codegrid.net/entry/z-index-1](https://app.codegrid.net/entry/z-index-1)
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これはなんでですか?z-indexを設定してないと全部zindex:autoになって、上から順に重ねられるからですか?
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## ソースコード
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```html
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<div class="box1">
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<div class="box3"></div>
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<div class="box5"></div>
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</div>
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<div class="box2">
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<div class="box4"></div>
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<div class="box6"></div>
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</div>
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```
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```css
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div {
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width: 250px;
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height: 250px;
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}
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.box1 {
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background: #ffa;
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position: relative;
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}
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.box2 {
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background: #faf;
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position: relative;
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}
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.box3,
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.box4 {
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opacity: 0;
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background: green;
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}
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.box1:hover .box3,
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.box2:hover .box4 {
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opacity: 1;
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}
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.box5,
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.box6 {
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display: none;
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}
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.box4:hover,
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.box3:hover {
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display: block;
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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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height: 100%;
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background: #aff;
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}
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```
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|
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41
139
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これを読みました
|
|
42
140
|
|
|
43
141
|
[https://app.codegrid.net/entry/z-index-1]( https://app.codegrid.net/entry/z-index-1 )
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