/**
 * 创建canvas 元素
 * @param id 提供一个canvas的ID
 * @paramType string
 * @return HTMLCanvasElement
 * @example
 * ``` typescript
 * const canvas:HTMLCanvasElement = createCanvas()
 * ```
 */
export declare function createCanvas(id?: string): HTMLCanvasElement;
/**
 * 创建canvas 的父级元素
 * @param canvas 提供一个canvas元素
 * @paramType HTMLCanvasElement
 * @return HTMLDivElement
 * @example
 * ``` typescript
 * const canvas:HTMLDivElement = createCavansParent()
 * ```
 */
export declare function createCanvasParent(canvas?: HTMLCanvasElement | null): HTMLElement;