Заменить условие if

let click1 = document.getElementById("click1"); 
      let click2 = document.getElementById("click2"); 
      let content = document.getElementById("content"); 
 
      const inf = { 
        click1: '<button id="click3">Click3</button>', 
        click2: "click2" 
      }; 
 
      function afterClick(newContent) { 
        content.innerHTML = inf[newContent]; 
        let click3 = document.getElementById("click3"); 
        thirdClick(click3); 
      } 
 
      click1.addEventListener("click", function() { 
        afterClick("click1"); 
      }); 
      click2.addEventListener("click", function() { 
        afterClick("click2"); 
      }); 
 
      function thirdClick(newClick) { 
        if (newClick !== null) { 
          newClick.addEventListener("click", function() { 
            inf.click1 += "Click3"; 
            afterClick("click1"); 
          }); 
        } 
      }

    <button id="click1">Click1</button> 
    <button id="click2">Click2</button> 
    <div id="content"></div>