when run this my div background is not changing . if i used img tag and put endpoint in src parrameters .but or am i doing it incorrect.

 const movies = testdt.slice(0, 1).map((item, index) => {
        return (
          <div className='item' key={index}>
              <div className="imagess" style={{backgroundImage:`url(${item.poster})` }}></div>
           
           <h6>{item.title}</h6>
          </div>
        );
      });
      
  return (
    <div>
        <div className="containn">
            {movies}
        </div>
    </div>