Dropzone

Drag a file over and the well darkens and the arrow lifts. A file that's too big shakes the well, flashes red and is refused.

Dropzone is part of Pro.

Get Pro to try it live and copy its code, along with every other element in the library.

Theme toggleSun becomes moon. The disc shrinks while a second disc slides in to bite a crescent out of it, and the rays fold away one after another.
Voice noteHold to record. The pill opens into a live waveform with a timer; let go and it becomes a voice note you can play, the bars filling as it plays.
Reed sliderA row of reeds rooted along a baseline. Drag (or arrow-key) the value and the reeds the hand has passed bend hard and long in the direction of travel, the ones ahead only stir; the fast you go, the harder they lean.
CrownA calm 270-degree dial. One hue drifts calm, warm, hot as you cross the two thresholds; the pointer meets a soft detent at each (travel drops to a quarter), the knob rides a spring and a number rolls in the middle.
InkA signature pad. Stroke width comes from pen pressure, else from speed (fast is thin).
Ooze listRows are drops in one goo layer, the text floats above it. Drag a row: it inks over and narrows, and the rows it passes slide through it, swelling into it and pinching off before they settle.