Requires the library mod Collective.
This mod is part of The Vanilla Experience.
Easy Elytra Takeoff is a minimalistic mod which allows easy taking off by elytra with a firework rocket from the ground without having to do that awkward jump. Just have the firework in your hand, click on an empty space and you'll fly off. Especially useful on servers where players have a high ping, making it difficult to take off from the ground.
The mods Colytra and Curious Elytra are supported.
Yes it's that easy: