Question

有谁知道它为什么不起作用？

我希望当我点击div odpoved时显示div dotaz。

function ukaz(a) {
  var elements = document.getElementsByClassName(a);
  for (var i = 0; i < elements.length; i++) {
    elements[i].style.display = "block";
  }
}

<div class="dotaz" onClick="ukaz(odpoved)">
  <p>YOSODJDN</p>
  <span class="qanick">jirka</span>
  <span class="fafadown"><i class="arrow fa fa-angle-down" style="font-size:24px"></i></span>
</div>

<div class="odpoved" style="display:none">
  <p>ODPOVED</p>
  <span class="qanick">anetka</span>
</div>

Answer 1

像这样使用它，将odpoved作为字符串传递

<div class="dotaz" onClick="ukaz('odpoved')">

＆＃13;

<div class="dotaz" onClick="ukaz('odpoved')">
<p>YOSODJDN</p>
<span class="qanick">jirka</span>
<span class="fafadown"><i class="arrow fa fa-angle-down" style="font- 
size:24px"></i></span>
</div>

<div class="odpoved" style="display:none">
<p>ODPOVED</p>
<span class="qanick">anetka</span> 
</div>


<script>
function ukaz(a) {
var elements = document.getElementsByClassName(a);
for (var i = 0; i < elements.length; i++) {
elements[i].style.display = "block";
}
}
</script>

＆＃13;

Answer 2

onClick="ukaz(odpoved)"试图使用变量 - 而不是字符串 - 作为参数来调用函数。

function ukaz(a) {
  var elements = document.getElementsByClassName(a);
  for (var i = 0; i < elements.length; i++) {
      elements[i].style.display = "block";
  }
}

<div class="dotaz" onClick="ukaz('odpoved')"> <!-- odpoved is a string, not a variable -->
  <p>YOSODJDN</p>
  <span class="qanick">jirka</span>
  <span class="fafadown">
    <i class="arrow fa fa-angle-down" style="font-size:24px"></i>
   </span>
</div>

<div class="odpoved" style="display:none">
  <p>ODPOVED</p>
  <span class="qanick">anetka</span> 
</div>

document.getElementsByClassName不起作用

2 个答案: