Mise en place d’événement sur les blocs

Array.from(document.querySelectorAll('div'),el => {
  
  let c = "votre couleur";
  el.style.color = el.style.background = c;
  
  el.addEventListener("mouseover", function( event ) {   
    // highlight the mouseover target
    event.target.style.color = "white";

    // reset the color after a short delay
    setTimeout(function() {
      event.target.style.color = c;
    }, 5000);
  }, false);}
 );

Action


JS Bin on jsbin.com