Javascript: byte must be 8 bits

Question

EDIT: http://www.ascii-code.com/ I see the BIN column as binary, but I obviously missed something.

Why doesn't binary conversion work for me?

Lower case b - character code 98

console.log((98).toString(2));

exits

1100010

The output length is 7 if it should be 8

Byte - 8 bits !?

EDIT

Bit groups make up a byte. When 8 bits are grouped together, it is then called a byte. And bytes are what computers use to represent various characters, such as the ones you see on the keyboard.

Quote from: http://wordsmuggler.com/Learn/Binary

Now I do not understand what I should read. If I look at Google, they always tell me 8, but here they tell me different. Please explain, because I do not understand what I should understand.

Answer 1

, .toString(2) 8- , , toString , 0 255. :

(1).toString(2) ==> "1"
(2).toString(2) ==> "10"
(3).toString(2) ==> "11"
(4).toString(2) ==> "100"
(25).toString(2) ==> "11001"
(934534534).toString(2) => "110111101100111101110110000110"

, JavaScript toString(2), 2, 0, 1, 10, 11, 100, 101 .., , 10 0, 1, 2, 3, 4, 5,... , . 8 .

, , - " 0..255 - BYTE JavaScript? , ; JavaScript! base-2 8- - , .

, , :

function byteString(n) {
  if (n < 0 || n > 255 || n % 1 !== 0) {
      throw new Error(n + " does not fit in a byte");
  }
  return ("000000000" + n.toString(2)).substr(-8)
}

:

> byteString(-4)
Error: -4 does not fit in a byte
> byteString(0)
'00000000'
> byteString(7)
'00000111'
> byteString(255)
'11111111'
> byteString(256)
Error: 256 does not fit in a byte