Does anything effect javelin damage

[ʍolɟ ǝɥʇ ǝsɹǝʌǝɹ]

Is it higher if you crit or lower against high magic resistance? Is it actually like pure damage?

[AIR]

As far as I know, it only counts the hit as true strike and add the fix ammount of extra damage is magical, per item description. So yeah, Magic Resist reduce the extra damage. It doesn't crit even if your hit crits. It's not pure damage, it's Magic Damage.

Same as the physical damage is reduced by armor, the hit that goes with javelin is just the same.

Basically, 30% change, on each attack, for that attack to be "Ignore Evasion + Deal extra magical damage".

A good example would be WW freezing a person, making it immune to physical damage. Hitting with maelstrom won't "Pierce" the ice, since the target is immune, not with dodging: but the magic dmg of the proc of the javelin, just like a maelstrom proc and any other magical dmg source, it would still go thru.

https://dota2.fandom.com/wiki/Javelin