javascript - 克隆 div 并通过 onclick 更改样式

Question

在我的 HTML 中，我有 4 个框，我想增加它们的大小并通过 onclick 出现在网站的中间。但它不适用于此克隆版本。

function changeSize(id, weight, height){
	//$( "." + id ).clone().appendTo( "new" + id );
	var elem = document.getElementById(id);
    clone = elem.cloneNode(true); // true means clone all childNodes and all event handlers
	clone.id = "newid" +id;
	document.body.appendChild(clone);
	    
    
    if(elem.getAttribute('style')){
        elem.removeAttribute('style');
    } else {
        elem.style.width = weight + 'px';
        elem.style.height = height + 'px';
        elem.style.fontSize = '30px';
       
        elem.style.position = 'absolute';
        elem.style.left= '40%';
    }
}

var elems = document.getElementsByClassName('kaesten');
for(var i = 0; i < elems.length; i++){
    elems[i].onclick = function(){
        changeSize(this.id, 600, 600);
    }
}

.kaesten{
	width:240px;
	height:300px;
	background-color:darkgrey;
	background-position:center;
	background-repeat:no-repeat;
	text-shadow:0px 0px 3px #000;
	border: 5px solid #F0F8ff;
	vertical-align:top;
	text-shadow: 3px 3px 4px #777;
	float:left;
	margin-left:30px;
}

<div id="box1" class="kaesten">test1</div>
<div id="box2" class="kaesten">test2</div>
<div id="box3" class="kaesten">test3</div>
<div id="box4" class="kaesten">test4</div>

问题:如何通过 onclick 克隆该框并将其显示在网站中间？如何通过 onclick 删除它？

Answer 1

您可以使用 jQuery css() 方法修改 CSS:来源:http://api.jquery.com/css/

要设置指定的 CSS 属性，请使用以下语法:

css("propertyname","value");

$(document).ready(function() {
  $('.kaesten').click(function() {
    $('.kaesten').removeAttr('style');
    
    var id = $(this).attr('id');
    $('#' + id).css({
      "width": "30em",
      "height": "18em",
      "top": "50%",
      "left": "50%",
      "position": "fixed",
      "margin-top": "-9em",
      "margin-left": "-15em",
      "background-color": "blue"

    });

  });
});

.kaesten {
  cursor: pointer;
  width: 240px;
  height: 300px;
  background-color: darkgrey;
  background-position: center;
  background-repeat: no-repeat;
  text-shadow: 0px 0px 3px #000;
  border: 5px solid #F0F8ff;
  vertical-align: top;
  text-shadow: 3px 3px 4px #777;
  float: left;
  margin-left: 30px;
  color: #fff;
  font-family: 'helvetica';
}
.container {
  position: relative;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div class="container">
  <div id="box1" class="kaesten">test1</div>
  <div id="box2" class="kaesten">test2</div>
  <div id="box3" class="kaesten">test3</div>
  <div id="box4" class="kaesten">test4</div>
</div>