質問編集履歴
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title
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body
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@@ -5,20 +5,70 @@
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とあるのですが、５０％の位置また、引き算が成立するのはなぜですか
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```
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header{
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height:200px;
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background : silver;
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position: relative;
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｝
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<!DOCTYPE html>
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<html lang="ja">
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<head>
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<meta charset="utf-8">
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<title>CSSの練習</title>
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<link rel="stylesheet" href="css/styles.css">
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</head>
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<body>
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<header>
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<div></div>
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</header>
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</body>
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</html>
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```
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```
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body {
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40
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margin: 0;
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position:absolute;
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top: calc(50% - 20 px);
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left: calc(50% - 50 px);
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}
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header {
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height: 200px;
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50
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background: silver;
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position: relative;
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}
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div {
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width: 100px;
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height: 40px;
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background: skyblue;
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position: absolute;
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top: calc(50% - 20px);
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left: calc(50% - 50px);
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```
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1
title
CHANGED
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File without changes
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body
CHANGED
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@@ -4,7 +4,8 @@
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4
4
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leftに関しては５０％の位置からdivの半分の幅を引いてあげればいいでしょう
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|
5
5
|
とあるのですが、５０％の位置また、引き算が成立するのはなぜですか
|
|
6
6
|
|
|
7
|
+
```
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7
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-
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8
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+
header{
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8
9
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height:200px;
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background : silver;
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position: relative;
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@@ -19,5 +20,5 @@
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left: calc(50% - 50 px);
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}
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```
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