ElytraWEEE

Holding a firework and jumping swaps the chestplate for an elytra and starts gliding in the same moment, without a second key press. The chestplate is put back when the player lands, and a firework dropped after landing sends the chestplate back automatically. A short grace window lets a firework picked up within 0.5 seconds still launch the player. Gear is never dropped, and if the inventory is full the chestplate stays on.

The mod is aimed at players who want quick flight without juggling armor by hand, and at PvP players who need to switch between a chestplate and an elytra in the middle of a fight. A single key flips the elytra and the chestplate instantly, even in mid-air. Ordinary jumps and attacks that land a critical hit leave the armor untouched, so the elytra only deploys when a firework is held and a jump is made on purpose.

The mod is client-side only. Fabric API is required, Cloth Config is required, and Mod Menu is optional; with Mod Menu installed, the settings screen can be opened from the menu. Files are published for Fabric only, for 26.1.2 and 26.2, with 1.3.0 for 26.2 as the latest file. The code is open source under the MIT License.