2018-10-10 22:03:03 +00:00
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id: 587d7faa367417b2b2512bd3
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challengeType: 6
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2020-09-17 16:13:05 +00:00
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forumTopicId: 301492
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2020-10-01 15:54:21 +00:00
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title: 给 D3 标签添加样式
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2018-10-10 22:03:03 +00:00
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---
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## Description
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2020-09-17 16:13:05 +00:00
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<section id='description'>
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D3 可以将样式添加到组标签中。<code>fill</code> 属性为 <code>text</code> 节点设置文本颜色，<code>style()</code> 方法设置其它样式的 CSS 规则，例如 "font-family"、"font-size"。
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</section>
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2018-10-10 22:03:03 +00:00
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## Instructions
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2020-09-17 16:13:05 +00:00
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<section id='instructions'>
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将 <code>text</code> 元素的 <code>font-size</code> 设置为 25px，文本颜色设置为 red。
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</section>
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2018-10-10 22:03:03 +00:00
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## Tests
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<section id='tests'>
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```yml
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tests:
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2020-09-17 16:13:05 +00:00
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- text: 所有标签的 <code>fill</code> 颜色应该是 red。
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2020-02-17 16:40:55 +00:00
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testString: assert($('text').css('fill') == 'rgb(255, 0, 0)');
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2020-09-17 16:13:05 +00:00
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- text: 所有标签的 <code>font-size</code> 应该为 25 个像素。
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2020-02-17 16:40:55 +00:00
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testString: assert($('text').css('font-size') == '25px');
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2018-10-10 22:03:03 +00:00
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<body>
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<script>
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const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];
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const w = 500;
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const h = 100;
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const svg = d3.select("body")
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.append("svg")
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.attr("width", w)
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.attr("height", h);
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svg.selectAll("rect")
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.data(dataset)
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.enter()
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.append("rect")
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.attr("x", (d, i) => i * 30)
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.attr("y", (d, i) => h - 3 * d)
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.attr("width", 25)
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.attr("height", (d, i) => d * 3)
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.attr("fill", "navy");
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svg.selectAll("text")
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.data(dataset)
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.enter()
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.append("text")
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.text((d) => d)
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.attr("x", (d, i) => i * 30)
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.attr("y", (d, i) => h - (3 * d) - 3)
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2020-09-17 16:13:05 +00:00
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// 在下面添加你的代码
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2018-10-10 22:03:03 +00:00
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2020-09-17 16:13:05 +00:00
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// 在上面添加你的代码
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2018-10-10 22:03:03 +00:00
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</script>
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</body>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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2020-09-17 16:13:05 +00:00
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```html
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<body>
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<script>
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const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];
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const w = 500;
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const h = 100;
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const svg = d3.select("body")
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.append("svg")
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.attr("width", w)
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.attr("height", h);
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svg.selectAll("rect")
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.data(dataset)
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.enter()
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.append("rect")
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.attr("x", (d, i) => i * 30)
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.attr("y", (d, i) => h - 3 * d)
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.attr("width", 25)
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.attr("height", (d, i) => d * 3)
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.attr("fill", "navy");
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svg.selectAll("text")
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.data(dataset)
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.enter()
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.append("text")
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.text((d) => d)
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.attr("x", (d, i) => i * 30)
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.attr("y", (d, i) => h - (3 * d) - 3)
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.style("font-size", 25)
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.attr("fill", "red")
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</script>
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</body>
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2018-10-10 22:03:03 +00:00
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```
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2020-08-13 15:24:35 +00:00
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2020-09-17 16:13:05 +00:00
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</section>
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