--- title: 'SyntaxError: unterminated string literal' slug: Web/JavaScript/Reference/Errors/Unterminated_string_literal tags: - Error - JavaScript - SyntaxError translation_of: Web/JavaScript/Reference/Errors/Unterminated_string_literal ---
SyntaxError: unterminated string literal
{{jsxref("SyntaxError")}}
某处 js 解析字符串出错。字符串必须使用单引号或双引号来正确的关闭。在 Javascript 中使用单引号的字符和双引号的字符串是没有区别的。字符串用转义字符不是单引号就是双引。为解决这个错误,检查一下:
在javascript中你不能够直接使用多行字符串赋值给一个变量。如下:
var longString = "This is a very long string which needs to wrap across multiple lines because otherwise my code is unreadable."; // SyntaxError: unterminated string literal
可以使用"+"运算符,反斜杠,或模板字符串来代替多行。“+”运算符的使用如下:
var longString = "This is a very long string which needs " + "to wrap across multiple lines because " + "otherwise my code is unreadable.";
或者你可以使用“\”在每一行的末尾,以表示该字符串在下一行继续。要确保“\“之后没有没有空格和任何其他的字符,及缩进,否则该“\”将不会起作用。使用方法如下:
var longString = "This is a very long string which needs \ to wrap across multiple lines because \ otherwise my code is unreadable.";
另一种方式是使用 ES 2015 的环境所支持模板字符串(反引号` `)。
var longString = `This is a very long string which needs to wrap across multiple lines because otherwise my code is unreadable.`;