Class DOMRectReadOnlyPolyfill

src/dom_rect_read_only.ts:14–97

 * Corresponds to the DOM DOMRectReadOnly API.
 */
export class DOMRectReadOnlyPolyfill {
	/**
	 * The x-coordinate of the rectangle.
	 */
	readonly x: number;
	/**
	 * The y-coordinate of the rectangle.
	 */
	readonly y: number;
	/**
	 * The width of the rectangle.
	 */
	readonly width: number;
	/**
	 * The height of the rectangle.
	 */
	readonly height: number;

	/**
	 * Creates a new DOMRectReadOnly.
	 */
	constructor(x = 0, y = 0, width = 0, height = 0) {
		this.x = x;
		this.y = y;
		this.width = width;
		this.height = height;
	}

	/**
	 * The top edge of the rectangle.
	 */
	get top(): number {
		return this.height < 0 ? this.y + this.height : this.y;
	}

	/**
	 * The right edge of the rectangle.
	 */
	get right(): number {
		return this.width < 0 ? this.x : this.x + this.width;
	}

	/**
	 * The bottom edge of the rectangle.
	 */
	get bottom(): number {
		return this.height < 0 ? this.y : this.y + this.height;
	}

	/**
	 * The left edge of the rectangle.
	 */
	get left(): number {
		return this.width < 0 ? this.x + this.width : this.x;
	}

	/**
	 * Creates a DOMRectReadOnly from a DOMRectInit.