如何在单击按钮时将多个元素有效地添加到div标签？

Question

Hey guys im building a scientific calculator in javascript and i was wondering if there was a better way of doing this because i have to do it for 50+ buttons. this is how im currently doing it in my Javascript file it works but i was thinking there must be a more efficient way doing this.

function percent() {
      display = document.getElementById('display')

      display = display + " %"

      document.getElementById('display').innerText = display
}

the id display is where i want to display the formula before the answer is given to the user.

Answer 1

您必须添加对象的内部HTML时才添加对象。

display = document.getElementById('display').innerHTML