边界半径隐藏的溢出在 chrome 中不起作用

Question

不确定它是特定于 chrome 的错误还是什么，但是当我在具有边界半径的溢出隐藏的父元素上转换子元素时，溢出是可见的，而转换就位。

var wrapper = document.getElementsByClassName('wrapper')[0],
  img = document.getElementsByTagName('img')[0];

/*
	Click anywhere in the bordered area to toggle img
*/

wrapper.addEventListener('click', function() {
  if (!img.className) {
    img.className = 'hidden';
  } else {
    img.className = '';
  }
}, false);

.wrapper {
  overflow: hidden;
  border-radius: 60px;
  border: 1px solid salmon;
}
img {
  width: 100%;
  height: auto;
  opacity: 1;
  transition: opacity 1s ease;
}
.hidden {
  opacity: 0;
}

<div class="wrapper">
  <img src="http://static.planetminecraft.com/files/resource_media/screenshot/1211/y-you-no-work_1687402.jpg">
</div>

这是一个演示问题的小提琴https://jsfiddle.net/827vuyqb/2/

任何解决方案，解决方法？

Answer 1

只需定位包装元素，并给它一个z-index：

var wrapper = document.getElementsByClassName('wrapper')[0],
  img = document.getElementsByTagName('img')[0];

/*
	Click anywhere in the bordered area to toggle img
*/

wrapper.addEventListener('click', function() {
  if (!img.className) {
    img.className = 'hidden';
  } else {
    img.className = '';
  }
}, false);

.wrapper {
  overflow: hidden;
  border-radius: 60px;
  border: 1px solid salmon;
  
  /*Position and z-index*/
  position: relative;
  z-index: 1;
}
img {
  width: 100%;
  height: auto;
  opacity: 1;
  transition: opacity 1s ease;
}
.hidden {
  opacity: 0;
}

<div class="wrapper">
  <img src="http://static.planetminecraft.com/files/resource_media/screenshot/1211/y-you-no-work_1687402.jpg">
</div>