This is somewhat of an internet axiom. All browser APIs are inconsistent. That's why web devs hate their lifes. Nowadays, it's smooth sailing, as you have about

This is somewhat of an internet axiom. All browser APIs are inconsistent. That's why web devs hate their lifes. Nowadays, it's smooth sailing, as you have about 3 browser engines to deal with. Around a decade ago, it was double that, and a load of bugs.