Silly Typscript is Silly

silly.ts

export class TRS {
    /** x transform */
    x: number;
    /** y transform */
    y: number;
    /** x scale */
    sx: number;
    /** y scale */
    sy: number;
    /** x rotation offset */
    tx: number;
    /** y rotation offset */
    ty: number;
    /** rotation amount in radians */
    rotation: number;

    constructor({
        x,
        y,
        sx,
        sy,
        tx,
        ty,
        rotation
    }: { 
        x: number; 
        y: number; 
        tx: number;
        ty: number;
        sx: number; 
        sy: number;
        rotation: number; 
    }) {

        this.x = x;
        this.y = y;
        this.tx = tx;
        this.ty = ty;
        this.sx = sx;
        this.sy = sy;
        this.rotation = rotation;
    }
}