class spriteManip {

    constructor() {}

    function subSprite(element,style){
        let spriteW = 8;
        let spriteH = 8;

        let tokens = style.split(' ');

        let xPos = 0;
        let yPos = 0;

        let x = str.split(tokens,'px')[0];
        let y = str.split(tokens,'px')[0];

        xx = ['left','right','center'].indexOf(x);
        yy = ['top','bottom','middle'].indexOf(y);

        if((xx === -1) && (yy === -1))
        {[x,y]=[y,x];}

        xx = ['left','right','center'].indexOf(x);
        yy = ['top','bottom','middle'].indexOf(y);

        if((xx === -1) && (yy === -1))
        {return 0;}

        // Determine the x position in the sprite sheet
        if (x === 'left') {
            xPos = spriteW * 0;
        } else if (x === 'right') {
            xPos = spriteW * 2;
        } else if (x === 'center') {
            xPos = spriteW * 1;
        }

        // Determine the y position in the sprite sheet
        if (y === 'top') {
            yPos = spriteH * 0;
        } else if (y === 'bottom') {
            yPos = spriteH * 2;
        } else if (y === 'middle') {
            yPos = spriteH * 1;
        }

        // Set the background position of the element
        element.style.backgroundPosition = `${xPos}px ${yPos}px`;

    }

}