js 創建節點

//獲取對象
console.log(obj)
//字符串轉對象
var ob = JSON.parse(data);
//對象轉為字符串
console.log(JSON.stringify(obj))
  //創建按鈕
 var body = document.body; 
   var input = document.createElement("input");  
   input.type = "button";  
   input.value = "創建一個按鈕";  
   body.appendChild(input);  
//創建 文本框
 var body = document.body; 
   var input = document.createElement("input");  
   input.type = "text";  
   input.value = "創建一個文本框";  
   body.appendChild(input);  

 var body = document.body; 
   var input = document.createElement("textarea");  
   input.value = "創建一個多行文本框";  
   body.appendChild(input);