error.message
error.message
属性是通过调用 new Error(message)
设置的错误的字符串描述。
传给构造函数的 message
也会出现在 Error
的堆栈跟踪的第一行,但是在 Error
对象创建后更改此属性可能不会更改堆栈跟踪的第一行(例如,当读取 error.stack
时 在此属性更改之前)。
const err = new Error('The message');
console.error(err.message);
// 打印: The message
The error.message
property is the string description of the error as set by
calling new Error(message)
. The message
passed to the constructor will also
appear in the first line of the stack trace of the Error
, however changing
this property after the Error
object is created may not change the first
line of the stack trace (for example, when error.stack
is read before this
property is changed).
const err = new Error('The message');
console.error(err.message);
// Prints: The message