Question

我正在尝试更新元素的innerHTML但没有获得任何输出。

每次点击炸玉米饼的图像时，应将炸玉米饼的价格添加到总数中。值是数字，而不是字符串。

感谢任何帮助，我很难过。

＆＃13;

(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);

})();

＆＃13;

<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>

＆＃13;

Answer 1

json.players.now

这预计会起作用吗？

您需要设置元素的json.players.online才能更新该元素。

Answer 2

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

应该工作

Answer 3

您的错误正在使用，TOTAL上的InnerHTML设置如此

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

而不是仅仅使用innerHTML

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

请参阅此处：点击#taco1后，您可以将值添加到总计中。试试吧：

(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>

innerHTML没有更新

3 个答案: