Date的构造方法使用数字，而不是字符串.要么直接输入:

Date's constructor takes a number, not a string. Either feed it in directly:

date = 1475235770601; // Note the lack of quotes making it a number

或者，如果您已经有一个字符串，则将其显式转换:

Or, if you already have a string, convert it explicitly:

date = parseInt(date);