/**
 * DOM write helpers that preserve the browser's undo/redo stack.
 *
 * Direct `element.value = x` wipes the undo history. `setRangeText` registers an undo
 * step instead, so Ctrl+Z keeps working. Every value mutation in NumoraInput should
 * route through one of these helpers (the public `setValue({ undoable: false })`
 * escape hatch is the only intentional exception).
 */
/**
 * Writes a new value to the input and sets the caret in one operation, preserving the
 * undo stack. Skips the write if the value and caret are already what we want - that
 * avoids adding a noisy no-op undo step.
 *
 * @param el - The input element
 * @param newValue - The value to write
 * @param cursorPos - The caret position to set after the write
 */
export declare function writeValuePreservingUndo(el: HTMLInputElement, newValue: string, cursorPos: number): void;
/**
 * Writes a focus-strip result: replaces the formatted value with raw digits and maps
 * the caret/selection in one shot. Uses `preserve` (not `end`) so setRangeText does not
 * snap the caret to the end of the string before setSelectionRange runs - that snap is
 * what causes the visible left-then-right flicker when external `input` listeners paint
 * between the two calls.
 */
export declare function writeStripPreservingUndo(el: HTMLInputElement, raw: string, rawStart: number, rawEnd: number): void;