Blur Container with all seeMore button

Question

Am coding web interface that allow user to clic some content to expand it and see more détails. Here My Js code

Const seeMoreBtn =      document.querySelectorAll('seeMoteBtn');
    For(let i=0; i<seeMoreBtn.length; i++){
      seeMoreBtn[i].addEventListener('click',    ()=>{
       document.getElementById('container').classList.    toggle('active');
      });
    }

no error and no active class assigned to container