將動態創建的按鈕拆分為Javascript / HTML行

Question

我正在嘗試從頭開始創建虛擬鍵盤。 到目前為止，我有一個函數可以根據給定的字符創建按鈕：

function keyButton(char) { //makes a button out of a string/char
  var btn = document.createElement("button"); //create button
  btn.innerText = char; //fill it with char
  btn.onclick = function () { keyStroke(this); };
  return btn;
}

我的代碼的第二部分拆分了一個典型的qwerty設置，並使用每個字母創建一個按鈕：

var keyList = "QWERTYUIOPASDFGHJKLZXCVBNM";
for (i in keyList) //loops through qwerty keyboard and uses keyButton
{
  var button = keyButton(keyList[i]);
  if (i < 11)
    //give that an element which identifies it as first row
   //document.body.appendChild(button) 
  else if (i < 20)
    //give that an element which identifies it as second row
  else {
    //give that an element which identifies it as third row

  }

我試圖做到這一點，以使按鈕不是一個接一個，而是分成10個鍵，然后是9個鍵，然后是7個鍵的列。 我不知道從哪里開始實現這一目標。 謝謝您的幫助！

Answer 1

 function keyButton(char, num) { var btn = document.createElement("button"); btn.innerText = char; btn.onclick = function () { keyStroke(this); }; btn.dataset.num = num; if(num == 10 || num == 19) { btn.className = 'break'; } keyboard.appendChild(btn); return btn; } var keyList = "QWERTYUIOPASDFGHJKLZXCVBNM"; var keyboard = document.getElementById('keyboard'); for (i in keyList) //loops through qwerty keyboard and usesn { keyButton(keyList[i], i); } 

 button { float: left; display: block; } button.break { clear: left; } 

 <div id="keyboard"></div>