在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

get() 方法在 StylePropertyMapReadOnly interface returns a CSSStyleValue object for the first value of the specified property.

句法

var declarationBlock = StylePropertyMapReadOnly.get(property)
					

参数

property

The name of the property to retrieve the value of.

返回值

A CSSStyleValue 对象。

范例

Let's get just a few properties and values. Let's start by creating a link inside a paragraph in our HTML, and adding a definition list which we will populate with JavaScript:

<p>
   <a href="https://example.com">Link</a>
</p>
<dl id="regurgitation"></dl>
					

We add a bit of CSS, including a custom property and an inhertable property:

p {
  font-weight: bold;
}
a {
   --colour: red;
   color: var(--colour);
}
					

We use the Element's computedStyleMap() to return a StylePropertyMapReadOnly object. We create an array of properties of interest and use the StylePropertyMapReadOnly's get() method to get only those values.

// get the element
const myElement = document.querySelector('a');
// get the <dl> we'll be populating
const stylesList = document.querySelector('#regurgitation');
// Retrieve all computed styles with computedStyleMap()
const styleMap = myElement.computedStyleMap();
// array of properties we're interested in
const ofInterest = ['font-weight', 'border-left-color', 'color', '--colour'];
// iterate thru our properties of interest
for ( let i = 0; i < ofInterest.length; i++ ) {
  	// properties
  const cssProperty = document.createElement('dt');
  cssProperty.appendChild(document.createTextNode(ofInterest[i]));
  stylesList.appendChild(cssProperty);
  	// values
  const cssValue = document.createElement('dd');
  cssValue.appendChild(document.createTextNode( styleMap.get(ofInterest[i])));
  stylesList.appendChild(cssValue);
}
					

规范

规范	状态	注释
CSS Typed OM Level 1 The definition of 'get()' in that specification.	工作草案	初始定义。

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
get	Chrome 66	Edge 79	Firefox No	IE No	Opera 53	Safari No	WebView Android 66	Chrome Android 66	Firefox Android No	Opera Android 47	Safari iOS No	Samsung Internet Android 9.0

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

另请参阅

• CSS Typed Object Model API
• Learning Houdini: the CSS Typed Object Model

元数据

• 最后修改： Jul 5, 2019

相关话题

1. StylePropertyMapReadOnly
2. 特性

   1. size
3. 方法

   1. entries()
   2. forEach()
   3. get()
   4. getAll()
   5. has()
   6. keys()
   7. values()