如何更改A的属性 <div> 切换班级？

Question

I have a <div class="content toggle"> that I have hidden until a certain event is called, and then I add a class to it to show that it needs to be visible.

My current CSS looks like:

.content {
  display: none;
}

.content.visible {
  display: block;
}

My code for adding .visible looks like this:

[].forEach.call(document.getElementsByClassName('toggle'), function(x) {
  x.classList.toggle('visible');
});

But, when the class .visible is added, the <div> is still display: none; . What's happening here? How can I fix it?

Answer 1

似乎您的JS选择了一个名为“ toggle”而不是“ content”的类：

getElementsByClassName('toggle')

Answer 2

There's 100 ways do what you want. Here's one solution.

   <script>
      function makeVisible() {
         var myContentDiv = document.getElementById("mycontent");
         myContentDiv.style.display = "block";
      }
   </script>
   <div id="mycontent" class="content"></div>
   <a id="mybutton" href="javascript:makeVisible()"></a>

Answer 3

Updated answer, to reflect the jsfiddle.

HTML:

<div class="content">hi</div>
<button id='button'>toggle visible</button>

JS

var button = document.getElementById('button');

button.onclick = function() {
    var div = document.getElementById('content');
    if (div.style.display !== 'none') {
        div.style.display = 'none';
    }
    else {
        div.style.display = 'block';
    }
};

Answer 4

.content {
  display: none;
}

.visible {
  display: block;
}

?

Answer 5

Keep your display classes separate from your core class.

in jQuery:

$(this).toggleClass("visible hidden");

and the css:

<style>
.visible {
   display: block;
}
.hidden {
   display: none;
}
</style>