Создание рпг игры на php

let items = document.querySelectorAll('.grid div'); 
let el; 
items.forEach(e => { 
  e.id = 'id_' + Math.random().toString(36).substring(2); 
  e.draggable = true; 
  e.ondragstart = () => { 
    el = e; 
    el.style.transform = 'scale(0.5)'; 
  }; 
  e.ondragend = () => el.style.transform = 'scale(1)'; 
}); 
 
document.querySelectorAll('.grid').forEach(e => { 
  e.ondragover = ev => ev.preventDefault(); 
  e.ondrop = ev => { 
    e.append(el) 
    console.log('move_to_' + e.id + '/' + el.id); 
  }; 
})

.grid { 
  display: inline-block; 
  width: 160px; 
  height: 160px; 
  border: solid; 
} 
 
.grid div { 
  display: block; 
  width: 30px; 
  height: 30px; 
  border: solid; 
  float: left; 
  margin: 3px 0 0 3px; 
  text-align:center; 
  line-height: 30px; 
  transition:0.1s; 
}

<div id=chest class="grid"> 
  <div>