Function syncLineNumbersSpans

packages/muya/src/utils/codeBlockLineNumbers.ts:30–40

(wrapper: HTMLElement, count: number)

// O(delta), not O(count) — typing within a line is free once the count
// matches.
export function syncLineNumbersSpans(wrapper: HTMLElement, count: number): void {
    let current = wrapper.childElementCount;
    while (current < count) {
        wrapper.appendChild(wrapper.ownerDocument.createElement('span'));
        current++;
    }
    while (current > count) {
        wrapper.lastElementChild!.remove();
        current--;
    }
}