parseint in IE8 conversion returns unequal (parseint ("08") returns 0, etc. with 0 beginning with a number string greater than 7)

Describe

　　parseint ("08") in the IE8 kernel returns 0, and the value returned by a number string that begins with 0 is greater than 7 is not equal

Workaround

　　parseint When Radix is not specified, S is calculated in hexadecimal when starting with 0x, and S is calculated according to octal if it starts with 0 and the second bit is not X, because octal cannot have 8, 9 so the error returns 0.

Test effective effects

　　parseint ("08", 10) ==8

parseint in IE8 conversion returns unequal (parseint ("08") returns 0, etc. with 0 beginning with a number string greater than 7)