64 lines
1.8 KiB
Markdown
64 lines
1.8 KiB
Markdown
---
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id: 587d7b84367417b2b2512b37
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title: 捕捉单引号和双引号的混合用法
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challengeType: 1
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forumTopicId: 301188
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dashedName: catch-mixed-usage-of-single-and-double-quotes
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---
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# --description--
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JavaScript 允许使用单引号(`'`)和双引号(`"`)声明字符串。 决定使用哪一个通常看个人偏好,但有一些例外。
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如果字符串中有缩写或存在一段带引号的文本,你就会明白为什么 JavaScript 允许两种引号了。 请注意,不要提前用引号结束字符串,这会导致语法错误。
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下面是混合使用引号的一些示例:
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```js
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const grouchoContraction = "I've had a perfectly wonderful evening, but this wasn't it.";
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const quoteInString = "Groucho Marx once said 'Quote me as saying I was mis-quoted.'";
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const uhOhGroucho = 'I've had a perfectly wonderful evening, but this wasn't it.';
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```
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前两项是正确的,但第三项是不正确的。
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当然,只使用一种引号也是可以的。 可以使用反斜杠(`\`)来转义字符串内的引号:
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```js
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const allSameQuotes = 'I\'ve had a perfectly wonderful evening, but this wasn\'t it.';
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```
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# --instructions--
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修复字符串,使其对 `href` 值使用不同的引号,或者转义现有的引号。 在整个字符串周围保留双引号。
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# --hints--
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你应通过更改或转义来修复 `href` 的值 `#Home` 周围的引号。
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```js
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assert(code.match(/<a href=\s*?('|\\")#Home\1\s*?>/g));
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```
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你应该在整个字符串外围保留双引号。
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```js
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assert(code.match(/"<p>.*?<\/p>";/g));
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```
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# --seed--
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## --seed-contents--
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```js
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let innerHtml = "<p>Click here to <a href="#Home">return home</a></p>";
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console.log(innerHtml);
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```
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# --solutions--
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```js
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let innerHtml = "<p>Click here to <a href=\"#Home\">return home</a></p>";
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console.log(innerHtml);
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```
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