28 lines
731 B
TypeScript
28 lines
731 B
TypeScript
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import { isValidNumber } from '../utils';
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export interface IDimensions {
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width: number
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height: number
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}
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export class Dimensions implements IDimensions {
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private _width: number
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private _height: number
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constructor(width: number, height: number) {
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if (!isValidNumber(width) || !isValidNumber(height)) {
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throw new Error(`Dimensions.constructor - expected width and height to be valid numbers, instead have ${JSON.stringify({ width, height })}`)
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}
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this._width = width
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this._height = height
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}
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public get width(): number { return this._width }
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public get height(): number { return this._height }
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public reverse(): Dimensions {
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return new Dimensions(1 / this.width, 1 / this.height)
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}
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}
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