Sequences of two bytes that when in the ISO-2022-JP charset and preceded by the JIS X 0201 1978 escape sequence, produce any ASCII character after decoding.
d = new TextDecoder('ISO-2022-JP')b1 = Math.floor(i / 256);0x0D
b2 = i % 256;0x0D
c = d.decode(new Uint8Array([0x1b, 0x24, 0x40, b1, b2])) 0x0D
if (c.split("").map((c) => c.charCodeAt(0)).some((i) => i < 127)) log(i)b1 = Math.floor(i / 256);0x0D
b2 = i % 256;0x0D
c = d.decode(new Uint8Array([0x1b, 0x24, 0x40, b1, b2])) 0x0D
if (c.split("").map((c) => c.charCodeAt(0)).some((i) => i < 127)) alert(i)