Node JS readFileSync严格模式下不允许八进制转义序列

Question

我想在节点js中读取一个文本文件

这是我的代码：

const fs = require('fs');
const contents = fs.readFileSync('1.txt', 'utf8');
console.log(contents);

但我得到了这个错误：

(node:5168) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): SyntaxError: Octal escape sequences are not allowed in strict mode.
(node:5168) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

此时，我该如何阅读文本文件？