--- id: 56533eb9ac21ba0edf2244b5 challengeType: 1 videoUrl: 'https://scrimba.com/c/c2QvgSr' forumTopicId: 17568 title: 转义字符串中的引号 --- ## Description
定义一个字符串必须要用单引号或双引号来包裹它。那么当你的字符串里面包含:"或者'时该怎么办呢? 在 JavaScript 中,你可以通过在引号前面使用反斜杠\)来转义引号。 var sampleStr = "Alan said, \"Peter is learning JavaScript\"."; 有了转义符号,JavaScript 就知道这个单引号或双引号并不是字符串的结尾,而是字符串内的字符。所以,上面的字符串打印到控制台的结果为: Alan said, "Peter is learning JavaScript".
## Instructions
使用反斜杠将一个字符串赋值给变量myStr,打印到控制台,输出为: I am a "double quoted" string inside "double quotes".
## Tests
```yml tests: - text: 你的代码中应该包含两个双引号 (") 以及四个转义的双引 (\")。 testString: assert(code.match(/\\"/g).length === 4 && code.match(/[^\\]"/g).length === 2); - text: 变量 myStr 应该包含字符串I am a "double quoted" string inside "double quotes".。 testString: assert(myStr === "I am a \"double quoted\" string inside \"double quotes\"."); ```
## Challenge Seed
```js var myStr = ""; // Change this line ```
### After Test
```js (function(){ if(typeof myStr === 'string') { console.log("myStr = \"" + myStr + "\""); } else { console.log("myStr is undefined"); } })(); ```
## Solution
```js var myStr = "I am a \"double quoted\" string inside \"double quotes\"."; ```