* [6.1](https://github.com/yuche/javascript#6.1) 字符串使用单引号 `''` 。 ~~~ // bad const name = "Capt. Janeway"; // good const name = 'Capt. Janeway'; ~~~ * [6.2](https://github.com/yuche/javascript#6.2) 字符串超过 80 个字节应该使用字符串连接号换行。 * [6.3](https://github.com/yuche/javascript#6.3) 注：过度使用字串连接符号可能会对性能造成影响。[jsPerf](http://jsperf.com/ya-string-concat) 和 [讨论](https://github.com/airbnb/javascript/issues/40). ~~~ // bad const errorMessage = 'This is a super long error that was thrown because of Batman. When you stop to think about how Batman had anything to do with this, you would get nowhere fast.'; // bad const errorMessage = 'This is a super long error that was thrown because \ of Batman. When you stop to think about how Batman had anything to do \ with this, you would get nowhere \ fast.'; // good const errorMessage = 'This is a super long error that was thrown because ' + 'of Batman. When you stop to think about how Batman had anything to do ' + 'with this, you would get nowhere fast.'; ~~~ * [6.4](https://github.com/yuche/javascript#6.4) 程序化生成字符串时，使用模板字符串代替字符串连接。 > 为什么？模板字符串更为简洁，更具可读性。 ~~~ // bad function sayHi(name) { return 'How are you, ' + name + '?'; } // bad function sayHi(name) { return ['How are you, ', name, '?'].join(); } // good function sayHi(name) { return `How are you, ${name}?`; } ~~~