Currency switch
Symbol and fraction changes share the same field.
01 / Live field
Auto pulse
Change the value. Keep the place.
Interrupt the motion with a new target, reverse it, or let the field continue its own short sequence.
$4,821.75
USD
02 / Format
The same motion reads many ways.
Switch symbols, separators, locales and value types while the layout keeps its rhythm.
Locale grouping
Separators and symbols follow Intl.NumberFormat.
Percentage field
Fractional input becomes a readable percent.
Large integer
BigInt values stay exact while the digits move.
03 / Motion
Choose the mechanism.
Gliding reels and hinged cards use the same number target with different physical cues.
Rolling reel
Spring motion with an optional vertical blur.
Fast changes retain their current position and velocity when a new target arrives.
Split-flap board
Hinged cards with a visible crease.
2,318
Each face turns through a bounded sequence, then settles back to one clean card.
04 / Text
Words can move through the same machinery.
Use direct glyph replacement for quiet labels or a wheel for a more mechanical board.
Direct transition
Each position goes straight to its next letter.
Wheel + flap
Letter cards advance through a custom wheel.
05 / Control
Tune one field in real time.
Change direction, timing, layout pressure and accessibility behavior without leaving the page.
Decimal
2,746.8
Ready for a new target.