<div id='test'></div>

(function(){
  let a = [[1,2,3,4,5],[1,2,3,4,5],[1,2,3,4,5],[1,2,3,4,5],[1,2,3,4,5]];
  let str = `<input type='button' value='Массив в консоли' onClick='console.log(a);'>`  
  document.getElementById('test').innerHTML = str;
    
  //let str = `<input type='button' value='Массив в консоли' id='test2'>`;  
  //document.getElementById('test2').addEventListener('click', () => {console.log(a);});  
})();