#P5 JS REFERENCE CODE#

You can call the Number.isNaN function to determine if the result of parseInt is NaN. Leading whitespace is allowed.įor arithmetic purposes, the NaN value is not a number in any radix. If the first character cannot be converted to a number with the radix in use, parseInt returns NaN. is not a numeral either, the return value will always be an integer. For example, although 1e3 technically encodes an integer (and will be correctly parsed to the integer 1000 by parseFloat()), parseInt('1e3', 10) returns 1, because e is not a valid numeral in base 10. If parseInt encounters a character that is not a numeral in the specified radix, it ignores it and all succeeding characters and returns the integer value parsed up to that point. If no signs are found, the algorithm moves to the following step otherwise, it removes the sign and runs the number-parsing on the rest of the string. It is done as an initial step in the parsing after whitespace is removed. ParseInt understands exactly two signs: + for positive, and - for negative. For example, for hexadecimal numbers (base 16), A through F are used. If the radix value (coerced if necessary) is not in range (inclusive) parseInt returns NaN.įor radices above 10, letters of the English alphabet indicate numerals greater than 9. If the radix is 16, parseInt() allows the string to be optionally prefixed by 0x or 0X after the optional sign character ( +/ -). The only prefix that parseInt() recognizes is 0x or 0X for hexadecimal values - everything else is parsed as a decimal value if radix is missing. parseInt() does not treat strings beginning with a 0 character as octal values either. Note: Other prefixes like 0b, which are valid in number literals, are treated as normal digits by parseInt().

#P5 JS REFERENCE CODE#

Warning: unreachable code after return statement.Warning: -file- is being assigned a //# sourceMappingURL, but already has one.TypeError: X.prototype.y called on incompatible type.TypeError: setting getter-only property 'x'.TypeError: Reduce of empty array with no initial value.TypeError: property 'x' is non-configurable and can't be deleted.TypeError: invalid assignment to const 'x'.TypeError: invalid 'instanceof' operand 'x'.TypeError: cannot use 'in' operator to search for 'x' in 'y'.TypeError: can't redefine non-configurable property 'x'.TypeError: can't delete non-configurable array element.TypeError: can't define property 'x': 'obj' is not extensible.TypeError: can't convert BigInt to number.TypeError: can't assign to property 'x' on 'y': not an object.TypeError: 'x' is not a non-null object.

Synta圎rror: Using to indicate sourceURL pragmas is deprecated.

Synta圎rror: unterminated string literal.

Synta圎rror: unparenthesized unary expression can't appear on the left-hand side of '**'.

Synta圎rror: unlabeled break must be inside loop or switch.

Synta圎rror: Unexpected '#' used outside of class body.

Synta圎rror: test for equality (=) mistyped as assignment (=)?.

Synta圎rror: redeclaration of formal parameter 'x'.

Synta圎rror: missing = in const declaration.

Synta圎rror: missing } after property list.

Synta圎rror: missing } after function body.

Synta圎rror: missing ] after element list.

Synta圎rror: missing ) after argument list.

Synta圎rror: missing : after property id.

Synta圎rror: invalid regular expression flag 'x'.

Synta圎rror: invalid assignment left-hand side.

Synta圎rror: identifier starts immediately after numeric literal.

Synta圎rror: function statement requires a name.

Synta圎rror: for-in loop head declarations may not have initializers.

Synta圎rror: continue must be inside loop.

Synta圎rror: cannot use `?` unparenthesized within `||` and `&` expressions.Synta圎rror: await is only valid in async functions, async generators and modules.Synta圎rror: applying the 'delete' operator to an unqualified name is deprecated.Synta圎rror: a declaration in the head of a for-of loop can't have an initializer.Synta圎rror: 'x' is a reserved identifier.Synta圎rror: 'use strict' not allowed in function with non-simple parameters.Synta圎rror: '0'-prefixed octal literals and octal escape seq.ReferenceError: reference to undefined property 'x'.ReferenceError: deprecated caller or arguments usage.ReferenceError: can't access lexical declaration 'X' before initialization.ReferenceError: assignment to undeclared variable 'x'.RangeError: x can't be converted to BigInt because it isn't an integer.RangeError: repeat count must be non-negative.RangeError: repeat count must be less than infinity.RangeError: argument is not a valid code point.Error: Permission denied to access property 'x'.Enumerability and ownership of properties.

P5 js reference