[prefer-targeted-element-main-frame.html]
[targeted box1 is selected snap target.]
expected: FAIL
[targeted box2 is selected snap target.]
expected: FAIL
[targeted box3 is selected snap target.]
expected: FAIL
[targeted box4 is selected snap target.]
expected: FAIL
[targeted box5 is selected snap target.]
expected: FAIL
[targeted box6 is selected snap target.]
expected: FAIL
[targeted box7 is selected snap target.]
expected: FAIL
[targeted box8 is selected snap target.]
expected: FAIL
[targeted box9 is selected snap target.]
expected: FAIL