Test .removeItem within DOM Storage. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Testing sessionStorage storage.clear() PASS storage.length is 0 PASS storage.foo1 is undefined. storage.foo1 = 'bar' PASS storage.foo1 is "bar" storage.removeItem('foo1') PASS storage.foo1 is undefined. storage.removeItem('foo1') PASS storage.foo1 is undefined. PASS storage['foo2'] is undefined. storage['foo2'] = 'bar' PASS storage['foo2'] is "bar" storage.removeItem('foo2') PASS storage['foo2'] is undefined. storage.removeItem('foo2') PASS storage['foo2'] is undefined. PASS storage.getItem('foo3') is null storage.setItem('foo3', 'bar') PASS storage.getItem('foo3') is "bar" storage.removeItem('foo3') PASS storage.getItem('foo3') is null storage.removeItem('foo3') PASS storage.getItem('foo3') is null Testing localStorage storage.clear() PASS storage.length is 0 PASS storage.foo1 is undefined. storage.foo1 = 'bar' PASS storage.foo1 is "bar" storage.removeItem('foo1') PASS storage.foo1 is undefined. storage.removeItem('foo1') PASS storage.foo1 is undefined. PASS storage['foo2'] is undefined. storage['foo2'] = 'bar' PASS storage['foo2'] is "bar" storage.removeItem('foo2') PASS storage['foo2'] is undefined. storage.removeItem('foo2') PASS storage['foo2'] is undefined. PASS storage.getItem('foo3') is null storage.setItem('foo3', 'bar') PASS storage.getItem('foo3') is "bar" storage.removeItem('foo3') PASS storage.getItem('foo3') is null storage.removeItem('foo3') PASS storage.getItem('foo3') is null PASS successfullyParsed is true TEST COMPLETE PASS successfullyParsed is true TEST COMPLETE