需要window.location.href行为说明

Question

我注意到，当您不将window.location.href绑定到某个事件浏览器时，不会让我返回页面。请解释为什么会这样

   let link = document.getElementById('link');

   link.addEventListener('click',function(){
    window.location.href = "v.html"
   })

// the code above works just fine and i can go back in history afterwards
// I can't do the same with the code below

   if(1){
      window.location.href = "v.html"
   }