innerHTML not updating

innerHTML not updating

本文关键字：updating not innerHTML      更新时间：2023-09-26

我正在尝试更新元素的innerHTML，但没有得到任何输出。

每次点击墨西哥卷饼的图片，墨西哥卷饼价格都应该加到总额中。这些值是数字，而不是字符串。

任何帮助都很感激，我被难住了。

(function() {
  var T1 = document.querySelector('#taco1');
  T1.addEventListener("click", function(e) {
    if (e.target.tagName === "IMG") {
      var Total = document.getElementById("Total").textContent;
      var price = document.getElementById("p1").textContent;
      var nbrprice = parseInt(price);
      var nbrTotal = parseInt(Total);
      console.log("value of nbrprice is " + nbrprice)
      console.log("nbrprice is a " + typeof(nbrprice));
      console.log("nbrTotal is a " + typeof(nbrTotal));
      var sum = Number(price) + Number(Total);
      console.log("sum is a " + typeof(sum));
      console.log("value of sum is " + sum);;
    }
    var sumtxt = (sum + nbrprice);
    Total.innerHTML = sumtxt.toString();
    console.log(Total);
  }, false);
})();
<div id='taco1'>
  <img src="https://placehold.it/300x100" width="300" />
  <p>Taco One Price: <span id="p1">4</span>
  </p>
</div>
<div id='taco2'>
  <img src="https://placehold.it/300x100" width="300" />
  <p>Taco Two Price: <span id="p2">5</span>
  </p>
</div>
<div>Total: $<span id="Total">0</span>
</div>

var Total = document.getElementById("Total");
//...
var nbrTotal = parseInt(Total.textContent);
//...
Total.innerHTML=sumtxt.toString();

应该工作

您的错误是使用，TOTAL交换机上的InnerHTML设置为如下

   var Total = document.getElementById("Total").textContent;

而不是仅在中使用innerHTML

var Total = document.getElementById("Total");

请参阅此处：单击#taco1时，会将值添加到总数中。请在此处尝试：

(function() {
  var T1 = document.querySelector('#taco1');
  T1.addEventListener("click", function(e) {
    if (e.target.tagName === "IMG") {
       var Total = document.getElementById("Total").textContent;
     var price = document.getElementById("p1").textContent;
      var nbrprice = parseInt(price);
      var nbrTotal = parseInt(Total);
      console.log("value of nbrprice is " + nbrprice)
      console.log("nbrprice is a " + typeof(nbrprice));
      console.log("nbrTotal is a " + typeof(nbrTotal));
      var sum = Number(price) + Number(Total);
      console.log("sum is a " + typeof(sum));
      console.log("value of sum is " + sum);;
     var sumtxt = (sum + nbrprice);
      console.log("sumtxt is a " + typeof(sumtxt));
      console.log("value of sumtxt is " + sumtxt);;
      console.log("sumtxt is a " + typeof((sumtxt).toString()));
      console.log("value of sumtxt is " + (sumtxt).toString());;
    document.getElementById("Total").innerHTML = sumtxt;
    console.log(sumtxt);
   }
  }, false);
})();
<div id='taco1'>
  <img src="https://placehold.it/300x100" width="300" />
  <p>Taco One Price: <span id="p1">4</span>
  </p>
</div>
<div id='taco2'>
  <img src="https://placehold.it/300x100" width="300" />
  <p>Taco Two Price: <span id="p2">5</span>
  </p>
</div>
<div>Total: $<span id="Total">0</span>
</div>

var Total = document.getElementById("Total").textContent;
// ...
Total.innerHTML = sumtxt.toString();

这是为什么预期的工作？

您需要设置元素的innerHTML，以便更新该元素。

我在文本区域也遇到了同样的问题。对我有效的是改变"；值"；组件的属性

相关文章：