Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <h3>获取css属性</h3>
<div class="first">获取颜色</div>
<p></p> <br>
<div class="second">获取文字尺寸</div>
<p></p> <br>
<div class="third">获取宽高尺寸</div>
<p></p> <br>

</br>
</br>
</br>
<h3>设置css属性</h3>
<div class="fourth">设置颜色设置文字尺寸</div>
<div class="fifth">设置颜色设置文字尺寸</div>
<div class="sixth">通过回调设置新的值</div>
<div class="seventh">同时设置多少个样式</div>
              
            
!

CSS

              
                div {
  width: 60px;
  height: 60px;
  margin: 5px;
  float: left;
  font-size: 0.8em;
  background: #40e0d0;
}
.first {
  background-color: lightSkyBlue;
}
.second {
  background-color: #ccc;
  color: red;
  font-size: 1.2em;
}
.third {
  background-color: yellow;
}
.sixth {
  font-size: 12px;
}

              
            
!

JS

              
                //background-color:blue; => rgb(0, 0, 255)
//颜色都会转化成统一的rgb标示
$("p:eq(0)").text($(".first").css("background-color"));
//字体大小都会转化成统px大小 em=>px
$("p:eq(1)").text($(".first").css("font-size"));
//获取尺寸,传入CSS属性组成的一个数组
//{width: "60px", height: "60px"}
var value = $(".first").css(["width", "height"]);
//因为获取的是一个对象,取到对应的值
$("p:eq(2)").text("widht:" + value.width + " height:" + value.height);
//多种写法设置颜色
$(".fourth").css("background-color", "red");
$(".fifth").css("backgroundColor", "blue");
//多种写法设置字体大小
$(".fourth").css("font-size", "12px");
$(".fifth").css("fontSize", "12px");

//获取到指定元素的宽度,在回调返回宽度值
//通过处理这个value,重新设置新的宽度
$(".sixth").css("width", function(index, value) {
  console.log(index);
  console.log(value);
  value = value.split("px");
  //返回一个新的值,在原有的值上,增加50px
  return Number(value[0]) + 50 + value[1];
});
//合并设置,通过对象传设置多个样式
$(".seventh").css({
  "font-size": "15px",
  "background-color": "#40E0D0",
  border: "10px solid red"
});

              
            
!
999px

Console