83 lines
1.6 KiB
Markdown
83 lines
1.6 KiB
Markdown
---
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id: 60a3e3396c7b40068ad6997f
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title: 步驟 22
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challengeType: 0
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dashedName: step-22
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---
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# --description--
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在畫布的頂部、底部、左側和右側添加 1 個像素的填充將其尺寸更改爲 502 像素 x 602 像素。
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將 `padding` 屬性替換爲 `overflow` 設置爲 `hidden` - 將畫布更改回其原始尺寸。
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# --hints--
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應該從 `.canvas` 選擇器中刪除 `padding` 屬性。
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```js
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const canvasPadding = new __helpers.CSSHelp(document).getStyle('.canvas').getPropertyValue('padding');
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assert(!canvasPadding);
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```
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應該將 `overflow` 屬性設置爲 `hidden`。
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```js
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const hasOverflow = new __helpers.CSSHelp(document).getCSSRules().some(x => x.style.overflow === 'hidden');
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assert(hasOverflow);
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```
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`.canvas` 元素的 `overflow` 值應爲 `hidden`。
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```js
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const canvasOverflow = new __helpers.CSSHelp(document).getStyle('.canvas')?.getPropertyValue('overflow');
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assert(canvasOverflow === 'hidden')
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```
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# --seed--
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## --seed-contents--
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```css
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.canvas {
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width: 500px;
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height: 600px;
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background-color: #4d0f00;
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--fcc-editable-region--
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padding: 1px;
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--fcc-editable-region--
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}
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.frame {
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border: 50px solid black;
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width: 500px;
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padding: 50px;
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margin: 20px auto;
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}
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.one {
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width: 425px;
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height: 150px;
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background-color: #efb762;
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margin: 20px auto;
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}
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```
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Rothko Painting</title>
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<link href="./styles.css" rel="stylesheet">
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</head>
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<body>
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<div class="frame">
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<div class="canvas">
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<div class="one"></div>
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</div>
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</div>
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</body>
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</html>
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```
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