javascript - parseInt - 在 Node 环境中，使用基数

Question

我找不到明确的答案，我们还需要使用基数(Node)吗？

let number = parseInt('666');

VS

let number = parseInt('666', 10);

Answer 1

将 MDN 填写至 parseInt :

If radix is undefined or 0 (or absent), JavaScript assumes the following:

• If the input string begins with "0x" or "0X", radix is 16 (hexadecimal) and the remainder of the string is parsed.

• If the input string begins with "0", radix is eight (octal) or 10 (decimal).  Exactly which radix is chosen is implementation-dependent.  ECMAScript 5 specifies that 10 (decimal) is used, but not all browsers support this yet. For this reason always specify a radix when using parseInt.

• If the input string begins with any other value, the radix is 10 (decimal).